Role of the heat treatment of partial melt recrystallization method on microstructure change and toughness of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) [P(HB-co-HV)]
The microstructure of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) [P(HB-co-HV)] was regulated by the heat treatment of partial melt recrystallization method (PMRM) to improve its mechanical properties effectively. The structural changes and toughening mechanism of P(HB-co-HV) were investigated by p...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Shi, Dan [verfasserIn] |
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| Format: |
E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2021transfer abstract |
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| Übergeordnetes Werk: |
Enthalten in: Functional outcomes at 12 months for patients with traumatic brain injury, intracerebral haemorrhage and subarachnoid haemorrhage treated in an Australian neurocritical care unit: A prospective cohort study - Fitzgerald, Emily ELSEVIER, 2020, the international journal for the science and technology of polymers, Oxford |
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| Übergeordnetes Werk: |
volume:228 ; year:2021 ; day:16 ; month:07 ; pages:0 |
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| DOI / URN: |
10.1016/j.polymer.2021.123874 |
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| 245 | 1 | 0 | |a Role of the heat treatment of partial melt recrystallization method on microstructure change and toughness of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) [P(HB-co-HV)] |
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| 520 | |a The microstructure of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) [P(HB-co-HV)] was regulated by the heat treatment of partial melt recrystallization method (PMRM) to improve its mechanical properties effectively. The structural changes and toughening mechanism of P(HB-co-HV) were investigated by polarized optical microscopy (POM), differential scanning calorimetry (DSC), and wide-angle X-ray diffraction (WAXD), small-angle X-ray scattering (SAXS), scanning electron microscope (SEM) as well as dynamic mechanical analysis (DMA) experiments. The imperfect crystals of P(HB-co-HV) melted at 176 °C while the remaining perfect crystals recrystallized at the higher temperature (T c = 120–150 °C). The results demonstrated that the HV units were easily to be excluded from the PHB crystal lattice in the P (HB-co-HV) recrystallization process, which promoted the crystal perfection of P(HB-co-HV) and improved the tensile strength and melting temperature. Furthermore, the heat treatment of PMRM reduced the molecular chain density and entanglement in the amorphous region and made the distribution of the tensile degree of the molecular chains more uniform, which was conducive to the sliding of lamellar crystals along the impact tensile direction, inducing plastic deformation. In addition, the heat treatment of P(HB-co-HV) via PMRM produced a large number of micropores, which was conducive to dispersing stress and improving its macroscopic toughness during the subsequent stretching process. | ||
| 520 | |a The microstructure of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) [P(HB-co-HV)] was regulated by the heat treatment of partial melt recrystallization method (PMRM) to improve its mechanical properties effectively. The structural changes and toughening mechanism of P(HB-co-HV) were investigated by polarized optical microscopy (POM), differential scanning calorimetry (DSC), and wide-angle X-ray diffraction (WAXD), small-angle X-ray scattering (SAXS), scanning electron microscope (SEM) as well as dynamic mechanical analysis (DMA) experiments. The imperfect crystals of P(HB-co-HV) melted at 176 °C while the remaining perfect crystals recrystallized at the higher temperature (T c = 120–150 °C). The results demonstrated that the HV units were easily to be excluded from the PHB crystal lattice in the P (HB-co-HV) recrystallization process, which promoted the crystal perfection of P(HB-co-HV) and improved the tensile strength and melting temperature. Furthermore, the heat treatment of PMRM reduced the molecular chain density and entanglement in the amorphous region and made the distribution of the tensile degree of the molecular chains more uniform, which was conducive to the sliding of lamellar crystals along the impact tensile direction, inducing plastic deformation. In addition, the heat treatment of P(HB-co-HV) via PMRM produced a large number of micropores, which was conducive to dispersing stress and improving its macroscopic toughness during the subsequent stretching process. | ||
| 650 | 7 | |a Heat treatment |2 Elsevier | |
| 650 | 7 | |a Toughness |2 Elsevier | |
| 650 | 7 | |a P(HB-Co-HV) |2 Elsevier | |
| 650 | 7 | |a Mechanical properties |2 Elsevier | |
| 650 | 7 | |a Microstructure |2 Elsevier | |
| 700 | 1 | |a Miao, Yushuang |4 oth | |
| 700 | 1 | |a Zhu, Hao |4 oth | |
| 700 | 1 | |a Li, Yiguo |4 oth | |
| 700 | 1 | |a Wang, Zongbao |4 oth | |
| 773 | 0 | 8 | |i Enthalten in |n Elsevier Science |a Fitzgerald, Emily ELSEVIER |t Functional outcomes at 12 months for patients with traumatic brain injury, intracerebral haemorrhage and subarachnoid haemorrhage treated in an Australian neurocritical care unit: A prospective cohort study |d 2020 |d the international journal for the science and technology of polymers |g Oxford |w (DE-627)ELV005093368 |
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10.1016/j.polymer.2021.123874 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001438.pica (DE-627)ELV054522587 (ELSEVIER)S0032-3861(21)00497-3 DE-627 ger DE-627 rakwb eng 610 VZ 44.63 bkl 44.69 bkl Shi, Dan verfasserin aut Role of the heat treatment of partial melt recrystallization method on microstructure change and toughness of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) [P(HB-co-HV)] 2021transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The microstructure of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) [P(HB-co-HV)] was regulated by the heat treatment of partial melt recrystallization method (PMRM) to improve its mechanical properties effectively. The structural changes and toughening mechanism of P(HB-co-HV) were investigated by polarized optical microscopy (POM), differential scanning calorimetry (DSC), and wide-angle X-ray diffraction (WAXD), small-angle X-ray scattering (SAXS), scanning electron microscope (SEM) as well as dynamic mechanical analysis (DMA) experiments. The imperfect crystals of P(HB-co-HV) melted at 176 °C while the remaining perfect crystals recrystallized at the higher temperature (T c = 120–150 °C). The results demonstrated that the HV units were easily to be excluded from the PHB crystal lattice in the P (HB-co-HV) recrystallization process, which promoted the crystal perfection of P(HB-co-HV) and improved the tensile strength and melting temperature. Furthermore, the heat treatment of PMRM reduced the molecular chain density and entanglement in the amorphous region and made the distribution of the tensile degree of the molecular chains more uniform, which was conducive to the sliding of lamellar crystals along the impact tensile direction, inducing plastic deformation. In addition, the heat treatment of P(HB-co-HV) via PMRM produced a large number of micropores, which was conducive to dispersing stress and improving its macroscopic toughness during the subsequent stretching process. The microstructure of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) [P(HB-co-HV)] was regulated by the heat treatment of partial melt recrystallization method (PMRM) to improve its mechanical properties effectively. The structural changes and toughening mechanism of P(HB-co-HV) were investigated by polarized optical microscopy (POM), differential scanning calorimetry (DSC), and wide-angle X-ray diffraction (WAXD), small-angle X-ray scattering (SAXS), scanning electron microscope (SEM) as well as dynamic mechanical analysis (DMA) experiments. The imperfect crystals of P(HB-co-HV) melted at 176 °C while the remaining perfect crystals recrystallized at the higher temperature (T c = 120–150 °C). The results demonstrated that the HV units were easily to be excluded from the PHB crystal lattice in the P (HB-co-HV) recrystallization process, which promoted the crystal perfection of P(HB-co-HV) and improved the tensile strength and melting temperature. Furthermore, the heat treatment of PMRM reduced the molecular chain density and entanglement in the amorphous region and made the distribution of the tensile degree of the molecular chains more uniform, which was conducive to the sliding of lamellar crystals along the impact tensile direction, inducing plastic deformation. In addition, the heat treatment of P(HB-co-HV) via PMRM produced a large number of micropores, which was conducive to dispersing stress and improving its macroscopic toughness during the subsequent stretching process. Heat treatment Elsevier Toughness Elsevier P(HB-Co-HV) Elsevier Mechanical properties Elsevier Microstructure Elsevier Miao, Yushuang oth Zhu, Hao oth Li, Yiguo oth Wang, Zongbao oth Enthalten in Elsevier Science Fitzgerald, Emily ELSEVIER Functional outcomes at 12 months for patients with traumatic brain injury, intracerebral haemorrhage and subarachnoid haemorrhage treated in an Australian neurocritical care unit: A prospective cohort study 2020 the international journal for the science and technology of polymers Oxford (DE-627)ELV005093368 volume:228 year:2021 day:16 month:07 pages:0 https://doi.org/10.1016/j.polymer.2021.123874 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA 44.63 Krankenpflege VZ 44.69 Intensivmedizin VZ AR 228 2021 16 0716 0 |
| spelling |
10.1016/j.polymer.2021.123874 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001438.pica (DE-627)ELV054522587 (ELSEVIER)S0032-3861(21)00497-3 DE-627 ger DE-627 rakwb eng 610 VZ 44.63 bkl 44.69 bkl Shi, Dan verfasserin aut Role of the heat treatment of partial melt recrystallization method on microstructure change and toughness of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) [P(HB-co-HV)] 2021transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The microstructure of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) [P(HB-co-HV)] was regulated by the heat treatment of partial melt recrystallization method (PMRM) to improve its mechanical properties effectively. The structural changes and toughening mechanism of P(HB-co-HV) were investigated by polarized optical microscopy (POM), differential scanning calorimetry (DSC), and wide-angle X-ray diffraction (WAXD), small-angle X-ray scattering (SAXS), scanning electron microscope (SEM) as well as dynamic mechanical analysis (DMA) experiments. The imperfect crystals of P(HB-co-HV) melted at 176 °C while the remaining perfect crystals recrystallized at the higher temperature (T c = 120–150 °C). The results demonstrated that the HV units were easily to be excluded from the PHB crystal lattice in the P (HB-co-HV) recrystallization process, which promoted the crystal perfection of P(HB-co-HV) and improved the tensile strength and melting temperature. Furthermore, the heat treatment of PMRM reduced the molecular chain density and entanglement in the amorphous region and made the distribution of the tensile degree of the molecular chains more uniform, which was conducive to the sliding of lamellar crystals along the impact tensile direction, inducing plastic deformation. In addition, the heat treatment of P(HB-co-HV) via PMRM produced a large number of micropores, which was conducive to dispersing stress and improving its macroscopic toughness during the subsequent stretching process. The microstructure of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) [P(HB-co-HV)] was regulated by the heat treatment of partial melt recrystallization method (PMRM) to improve its mechanical properties effectively. The structural changes and toughening mechanism of P(HB-co-HV) were investigated by polarized optical microscopy (POM), differential scanning calorimetry (DSC), and wide-angle X-ray diffraction (WAXD), small-angle X-ray scattering (SAXS), scanning electron microscope (SEM) as well as dynamic mechanical analysis (DMA) experiments. The imperfect crystals of P(HB-co-HV) melted at 176 °C while the remaining perfect crystals recrystallized at the higher temperature (T c = 120–150 °C). The results demonstrated that the HV units were easily to be excluded from the PHB crystal lattice in the P (HB-co-HV) recrystallization process, which promoted the crystal perfection of P(HB-co-HV) and improved the tensile strength and melting temperature. Furthermore, the heat treatment of PMRM reduced the molecular chain density and entanglement in the amorphous region and made the distribution of the tensile degree of the molecular chains more uniform, which was conducive to the sliding of lamellar crystals along the impact tensile direction, inducing plastic deformation. In addition, the heat treatment of P(HB-co-HV) via PMRM produced a large number of micropores, which was conducive to dispersing stress and improving its macroscopic toughness during the subsequent stretching process. Heat treatment Elsevier Toughness Elsevier P(HB-Co-HV) Elsevier Mechanical properties Elsevier Microstructure Elsevier Miao, Yushuang oth Zhu, Hao oth Li, Yiguo oth Wang, Zongbao oth Enthalten in Elsevier Science Fitzgerald, Emily ELSEVIER Functional outcomes at 12 months for patients with traumatic brain injury, intracerebral haemorrhage and subarachnoid haemorrhage treated in an Australian neurocritical care unit: A prospective cohort study 2020 the international journal for the science and technology of polymers Oxford (DE-627)ELV005093368 volume:228 year:2021 day:16 month:07 pages:0 https://doi.org/10.1016/j.polymer.2021.123874 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA 44.63 Krankenpflege VZ 44.69 Intensivmedizin VZ AR 228 2021 16 0716 0 |
| allfields_unstemmed |
10.1016/j.polymer.2021.123874 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001438.pica (DE-627)ELV054522587 (ELSEVIER)S0032-3861(21)00497-3 DE-627 ger DE-627 rakwb eng 610 VZ 44.63 bkl 44.69 bkl Shi, Dan verfasserin aut Role of the heat treatment of partial melt recrystallization method on microstructure change and toughness of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) [P(HB-co-HV)] 2021transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The microstructure of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) [P(HB-co-HV)] was regulated by the heat treatment of partial melt recrystallization method (PMRM) to improve its mechanical properties effectively. The structural changes and toughening mechanism of P(HB-co-HV) were investigated by polarized optical microscopy (POM), differential scanning calorimetry (DSC), and wide-angle X-ray diffraction (WAXD), small-angle X-ray scattering (SAXS), scanning electron microscope (SEM) as well as dynamic mechanical analysis (DMA) experiments. The imperfect crystals of P(HB-co-HV) melted at 176 °C while the remaining perfect crystals recrystallized at the higher temperature (T c = 120–150 °C). The results demonstrated that the HV units were easily to be excluded from the PHB crystal lattice in the P (HB-co-HV) recrystallization process, which promoted the crystal perfection of P(HB-co-HV) and improved the tensile strength and melting temperature. Furthermore, the heat treatment of PMRM reduced the molecular chain density and entanglement in the amorphous region and made the distribution of the tensile degree of the molecular chains more uniform, which was conducive to the sliding of lamellar crystals along the impact tensile direction, inducing plastic deformation. In addition, the heat treatment of P(HB-co-HV) via PMRM produced a large number of micropores, which was conducive to dispersing stress and improving its macroscopic toughness during the subsequent stretching process. The microstructure of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) [P(HB-co-HV)] was regulated by the heat treatment of partial melt recrystallization method (PMRM) to improve its mechanical properties effectively. The structural changes and toughening mechanism of P(HB-co-HV) were investigated by polarized optical microscopy (POM), differential scanning calorimetry (DSC), and wide-angle X-ray diffraction (WAXD), small-angle X-ray scattering (SAXS), scanning electron microscope (SEM) as well as dynamic mechanical analysis (DMA) experiments. The imperfect crystals of P(HB-co-HV) melted at 176 °C while the remaining perfect crystals recrystallized at the higher temperature (T c = 120–150 °C). The results demonstrated that the HV units were easily to be excluded from the PHB crystal lattice in the P (HB-co-HV) recrystallization process, which promoted the crystal perfection of P(HB-co-HV) and improved the tensile strength and melting temperature. Furthermore, the heat treatment of PMRM reduced the molecular chain density and entanglement in the amorphous region and made the distribution of the tensile degree of the molecular chains more uniform, which was conducive to the sliding of lamellar crystals along the impact tensile direction, inducing plastic deformation. In addition, the heat treatment of P(HB-co-HV) via PMRM produced a large number of micropores, which was conducive to dispersing stress and improving its macroscopic toughness during the subsequent stretching process. Heat treatment Elsevier Toughness Elsevier P(HB-Co-HV) Elsevier Mechanical properties Elsevier Microstructure Elsevier Miao, Yushuang oth Zhu, Hao oth Li, Yiguo oth Wang, Zongbao oth Enthalten in Elsevier Science Fitzgerald, Emily ELSEVIER Functional outcomes at 12 months for patients with traumatic brain injury, intracerebral haemorrhage and subarachnoid haemorrhage treated in an Australian neurocritical care unit: A prospective cohort study 2020 the international journal for the science and technology of polymers Oxford (DE-627)ELV005093368 volume:228 year:2021 day:16 month:07 pages:0 https://doi.org/10.1016/j.polymer.2021.123874 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA 44.63 Krankenpflege VZ 44.69 Intensivmedizin VZ AR 228 2021 16 0716 0 |
| allfieldsGer |
10.1016/j.polymer.2021.123874 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001438.pica (DE-627)ELV054522587 (ELSEVIER)S0032-3861(21)00497-3 DE-627 ger DE-627 rakwb eng 610 VZ 44.63 bkl 44.69 bkl Shi, Dan verfasserin aut Role of the heat treatment of partial melt recrystallization method on microstructure change and toughness of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) [P(HB-co-HV)] 2021transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The microstructure of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) [P(HB-co-HV)] was regulated by the heat treatment of partial melt recrystallization method (PMRM) to improve its mechanical properties effectively. The structural changes and toughening mechanism of P(HB-co-HV) were investigated by polarized optical microscopy (POM), differential scanning calorimetry (DSC), and wide-angle X-ray diffraction (WAXD), small-angle X-ray scattering (SAXS), scanning electron microscope (SEM) as well as dynamic mechanical analysis (DMA) experiments. The imperfect crystals of P(HB-co-HV) melted at 176 °C while the remaining perfect crystals recrystallized at the higher temperature (T c = 120–150 °C). The results demonstrated that the HV units were easily to be excluded from the PHB crystal lattice in the P (HB-co-HV) recrystallization process, which promoted the crystal perfection of P(HB-co-HV) and improved the tensile strength and melting temperature. Furthermore, the heat treatment of PMRM reduced the molecular chain density and entanglement in the amorphous region and made the distribution of the tensile degree of the molecular chains more uniform, which was conducive to the sliding of lamellar crystals along the impact tensile direction, inducing plastic deformation. In addition, the heat treatment of P(HB-co-HV) via PMRM produced a large number of micropores, which was conducive to dispersing stress and improving its macroscopic toughness during the subsequent stretching process. The microstructure of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) [P(HB-co-HV)] was regulated by the heat treatment of partial melt recrystallization method (PMRM) to improve its mechanical properties effectively. The structural changes and toughening mechanism of P(HB-co-HV) were investigated by polarized optical microscopy (POM), differential scanning calorimetry (DSC), and wide-angle X-ray diffraction (WAXD), small-angle X-ray scattering (SAXS), scanning electron microscope (SEM) as well as dynamic mechanical analysis (DMA) experiments. The imperfect crystals of P(HB-co-HV) melted at 176 °C while the remaining perfect crystals recrystallized at the higher temperature (T c = 120–150 °C). The results demonstrated that the HV units were easily to be excluded from the PHB crystal lattice in the P (HB-co-HV) recrystallization process, which promoted the crystal perfection of P(HB-co-HV) and improved the tensile strength and melting temperature. Furthermore, the heat treatment of PMRM reduced the molecular chain density and entanglement in the amorphous region and made the distribution of the tensile degree of the molecular chains more uniform, which was conducive to the sliding of lamellar crystals along the impact tensile direction, inducing plastic deformation. In addition, the heat treatment of P(HB-co-HV) via PMRM produced a large number of micropores, which was conducive to dispersing stress and improving its macroscopic toughness during the subsequent stretching process. Heat treatment Elsevier Toughness Elsevier P(HB-Co-HV) Elsevier Mechanical properties Elsevier Microstructure Elsevier Miao, Yushuang oth Zhu, Hao oth Li, Yiguo oth Wang, Zongbao oth Enthalten in Elsevier Science Fitzgerald, Emily ELSEVIER Functional outcomes at 12 months for patients with traumatic brain injury, intracerebral haemorrhage and subarachnoid haemorrhage treated in an Australian neurocritical care unit: A prospective cohort study 2020 the international journal for the science and technology of polymers Oxford (DE-627)ELV005093368 volume:228 year:2021 day:16 month:07 pages:0 https://doi.org/10.1016/j.polymer.2021.123874 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA 44.63 Krankenpflege VZ 44.69 Intensivmedizin VZ AR 228 2021 16 0716 0 |
| allfieldsSound |
10.1016/j.polymer.2021.123874 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001438.pica (DE-627)ELV054522587 (ELSEVIER)S0032-3861(21)00497-3 DE-627 ger DE-627 rakwb eng 610 VZ 44.63 bkl 44.69 bkl Shi, Dan verfasserin aut Role of the heat treatment of partial melt recrystallization method on microstructure change and toughness of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) [P(HB-co-HV)] 2021transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The microstructure of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) [P(HB-co-HV)] was regulated by the heat treatment of partial melt recrystallization method (PMRM) to improve its mechanical properties effectively. The structural changes and toughening mechanism of P(HB-co-HV) were investigated by polarized optical microscopy (POM), differential scanning calorimetry (DSC), and wide-angle X-ray diffraction (WAXD), small-angle X-ray scattering (SAXS), scanning electron microscope (SEM) as well as dynamic mechanical analysis (DMA) experiments. The imperfect crystals of P(HB-co-HV) melted at 176 °C while the remaining perfect crystals recrystallized at the higher temperature (T c = 120–150 °C). The results demonstrated that the HV units were easily to be excluded from the PHB crystal lattice in the P (HB-co-HV) recrystallization process, which promoted the crystal perfection of P(HB-co-HV) and improved the tensile strength and melting temperature. Furthermore, the heat treatment of PMRM reduced the molecular chain density and entanglement in the amorphous region and made the distribution of the tensile degree of the molecular chains more uniform, which was conducive to the sliding of lamellar crystals along the impact tensile direction, inducing plastic deformation. In addition, the heat treatment of P(HB-co-HV) via PMRM produced a large number of micropores, which was conducive to dispersing stress and improving its macroscopic toughness during the subsequent stretching process. The microstructure of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) [P(HB-co-HV)] was regulated by the heat treatment of partial melt recrystallization method (PMRM) to improve its mechanical properties effectively. The structural changes and toughening mechanism of P(HB-co-HV) were investigated by polarized optical microscopy (POM), differential scanning calorimetry (DSC), and wide-angle X-ray diffraction (WAXD), small-angle X-ray scattering (SAXS), scanning electron microscope (SEM) as well as dynamic mechanical analysis (DMA) experiments. The imperfect crystals of P(HB-co-HV) melted at 176 °C while the remaining perfect crystals recrystallized at the higher temperature (T c = 120–150 °C). The results demonstrated that the HV units were easily to be excluded from the PHB crystal lattice in the P (HB-co-HV) recrystallization process, which promoted the crystal perfection of P(HB-co-HV) and improved the tensile strength and melting temperature. Furthermore, the heat treatment of PMRM reduced the molecular chain density and entanglement in the amorphous region and made the distribution of the tensile degree of the molecular chains more uniform, which was conducive to the sliding of lamellar crystals along the impact tensile direction, inducing plastic deformation. In addition, the heat treatment of P(HB-co-HV) via PMRM produced a large number of micropores, which was conducive to dispersing stress and improving its macroscopic toughness during the subsequent stretching process. Heat treatment Elsevier Toughness Elsevier P(HB-Co-HV) Elsevier Mechanical properties Elsevier Microstructure Elsevier Miao, Yushuang oth Zhu, Hao oth Li, Yiguo oth Wang, Zongbao oth Enthalten in Elsevier Science Fitzgerald, Emily ELSEVIER Functional outcomes at 12 months for patients with traumatic brain injury, intracerebral haemorrhage and subarachnoid haemorrhage treated in an Australian neurocritical care unit: A prospective cohort study 2020 the international journal for the science and technology of polymers Oxford (DE-627)ELV005093368 volume:228 year:2021 day:16 month:07 pages:0 https://doi.org/10.1016/j.polymer.2021.123874 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA 44.63 Krankenpflege VZ 44.69 Intensivmedizin VZ AR 228 2021 16 0716 0 |
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role of the heat treatment of partial melt recrystallization method on microstructure change and toughness of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) [p(hb-co-hv)] |
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Role of the heat treatment of partial melt recrystallization method on microstructure change and toughness of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) [P(HB-co-HV)] |
| abstract |
The microstructure of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) [P(HB-co-HV)] was regulated by the heat treatment of partial melt recrystallization method (PMRM) to improve its mechanical properties effectively. The structural changes and toughening mechanism of P(HB-co-HV) were investigated by polarized optical microscopy (POM), differential scanning calorimetry (DSC), and wide-angle X-ray diffraction (WAXD), small-angle X-ray scattering (SAXS), scanning electron microscope (SEM) as well as dynamic mechanical analysis (DMA) experiments. The imperfect crystals of P(HB-co-HV) melted at 176 °C while the remaining perfect crystals recrystallized at the higher temperature (T c = 120–150 °C). The results demonstrated that the HV units were easily to be excluded from the PHB crystal lattice in the P (HB-co-HV) recrystallization process, which promoted the crystal perfection of P(HB-co-HV) and improved the tensile strength and melting temperature. Furthermore, the heat treatment of PMRM reduced the molecular chain density and entanglement in the amorphous region and made the distribution of the tensile degree of the molecular chains more uniform, which was conducive to the sliding of lamellar crystals along the impact tensile direction, inducing plastic deformation. In addition, the heat treatment of P(HB-co-HV) via PMRM produced a large number of micropores, which was conducive to dispersing stress and improving its macroscopic toughness during the subsequent stretching process. |
| abstractGer |
The microstructure of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) [P(HB-co-HV)] was regulated by the heat treatment of partial melt recrystallization method (PMRM) to improve its mechanical properties effectively. The structural changes and toughening mechanism of P(HB-co-HV) were investigated by polarized optical microscopy (POM), differential scanning calorimetry (DSC), and wide-angle X-ray diffraction (WAXD), small-angle X-ray scattering (SAXS), scanning electron microscope (SEM) as well as dynamic mechanical analysis (DMA) experiments. The imperfect crystals of P(HB-co-HV) melted at 176 °C while the remaining perfect crystals recrystallized at the higher temperature (T c = 120–150 °C). The results demonstrated that the HV units were easily to be excluded from the PHB crystal lattice in the P (HB-co-HV) recrystallization process, which promoted the crystal perfection of P(HB-co-HV) and improved the tensile strength and melting temperature. Furthermore, the heat treatment of PMRM reduced the molecular chain density and entanglement in the amorphous region and made the distribution of the tensile degree of the molecular chains more uniform, which was conducive to the sliding of lamellar crystals along the impact tensile direction, inducing plastic deformation. In addition, the heat treatment of P(HB-co-HV) via PMRM produced a large number of micropores, which was conducive to dispersing stress and improving its macroscopic toughness during the subsequent stretching process. |
| abstract_unstemmed |
The microstructure of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) [P(HB-co-HV)] was regulated by the heat treatment of partial melt recrystallization method (PMRM) to improve its mechanical properties effectively. The structural changes and toughening mechanism of P(HB-co-HV) were investigated by polarized optical microscopy (POM), differential scanning calorimetry (DSC), and wide-angle X-ray diffraction (WAXD), small-angle X-ray scattering (SAXS), scanning electron microscope (SEM) as well as dynamic mechanical analysis (DMA) experiments. The imperfect crystals of P(HB-co-HV) melted at 176 °C while the remaining perfect crystals recrystallized at the higher temperature (T c = 120–150 °C). The results demonstrated that the HV units were easily to be excluded from the PHB crystal lattice in the P (HB-co-HV) recrystallization process, which promoted the crystal perfection of P(HB-co-HV) and improved the tensile strength and melting temperature. Furthermore, the heat treatment of PMRM reduced the molecular chain density and entanglement in the amorphous region and made the distribution of the tensile degree of the molecular chains more uniform, which was conducive to the sliding of lamellar crystals along the impact tensile direction, inducing plastic deformation. In addition, the heat treatment of P(HB-co-HV) via PMRM produced a large number of micropores, which was conducive to dispersing stress and improving its macroscopic toughness during the subsequent stretching process. |
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