Effect of Side Groups on the Conformation of a Series of Polysiloxanes in Solution
Abstract The molecular conformation has been obtained for polysiloxane chains in which the pairs of substituents bonded at the silicon atom are $ CH_{3} $, $ CH_{3} $; $ C_{2} $$ H_{5} $, $ C_{2} $$ H_{5} $; $ CH_{3} $, $ C_{6} $$ H_{13} $; $ CH_{3} $, $ C_{16} $$ H_{33} $; and $ CH_{3} $, $ C_{6} $...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Villegas, J. A. [verfasserIn] |
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| Format: |
Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2003 |
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| Anmerkung: |
© Plenum Publishing Corporation 2003 |
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| Übergeordnetes Werk: |
Enthalten in: Journal of inorganic and organometallic polymers and materials - Kluwer Academic Publishers-Plenum Publishers, 1991, 13(2003), 4 vom: Dez., Seite 205-222 |
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| Übergeordnetes Werk: |
volume:13 ; year:2003 ; number:4 ; month:12 ; pages:205-222 |
| Links: |
|---|
| DOI / URN: |
10.1023/A:1026191926742 |
|---|
| Katalog-ID: |
OLC2061505074 |
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| 520 | |a Abstract The molecular conformation has been obtained for polysiloxane chains in which the pairs of substituents bonded at the silicon atom are $ CH_{3} $, $ CH_{3} $; $ C_{2} $$ H_{5} $, $ C_{2} $$ H_{5} $; $ CH_{3} $, $ C_{6} $$ H_{13} $; $ CH_{3} $, $ C_{16} $$ H_{33} $; and $ CH_{3} $, $ C_{6} $$ H_{5} $. Polysiloxanes dissolved in toluene and benzene were studied using a coupled system: Gel Permeation Chromatography/Light Scattering (GPC/LS). Attention was focused on the influence in the molecular conformation of the quality of the solvent and the type of substituent on the main chain. The results obtained were strongly dependent on the side group size and flexibility. Poly(dimethylsiloxane) samples of 273,400 and 97,600 daltons showed a semi-flexible conformation, but the sample of relatively low molecular weight (36×$ 10^{3} $ daltons) exhibited a slope of 0.6 in good solvents; i.e., demonstrated the behavior of dilute (non-overlapping) coils in a good solvent. With respect to the poly(diethylsiloxane), the source of the coil's expansion is the high mobility of the side chains. Poly(methylphenylsiloxane) exhibits a rigid rod conformation in both solvents. The orientation of the phenyl groups and the attractive interaction between these groups dominate the polysiloxane chain behavior in good solvents. For these polysiloxanes, the expansion factor value is analyzed and the influence of solvent on the polymer's unperturbed dimensions is discussed. Poly(methylhexylsiloxane) and poly(methylhexadecylsiloxane) show a spherical conformation in both solvents. This conformation may arise from strong interactions between the bulky side groups and the main chain. | ||
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10.1023/A:1026191926742 doi (DE-627)OLC2061505074 (DE-He213)A:1026191926742-p DE-627 ger DE-627 rakwb eng 660 VZ Villegas, J. A. verfasserin aut Effect of Side Groups on the Conformation of a Series of Polysiloxanes in Solution 2003 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Plenum Publishing Corporation 2003 Abstract The molecular conformation has been obtained for polysiloxane chains in which the pairs of substituents bonded at the silicon atom are $ CH_{3} $, $ CH_{3} $; $ C_{2} $$ H_{5} $, $ C_{2} $$ H_{5} $; $ CH_{3} $, $ C_{6} $$ H_{13} $; $ CH_{3} $, $ C_{16} $$ H_{33} $; and $ CH_{3} $, $ C_{6} $$ H_{5} $. Polysiloxanes dissolved in toluene and benzene were studied using a coupled system: Gel Permeation Chromatography/Light Scattering (GPC/LS). Attention was focused on the influence in the molecular conformation of the quality of the solvent and the type of substituent on the main chain. The results obtained were strongly dependent on the side group size and flexibility. Poly(dimethylsiloxane) samples of 273,400 and 97,600 daltons showed a semi-flexible conformation, but the sample of relatively low molecular weight (36×$ 10^{3} $ daltons) exhibited a slope of 0.6 in good solvents; i.e., demonstrated the behavior of dilute (non-overlapping) coils in a good solvent. With respect to the poly(diethylsiloxane), the source of the coil's expansion is the high mobility of the side chains. Poly(methylphenylsiloxane) exhibits a rigid rod conformation in both solvents. The orientation of the phenyl groups and the attractive interaction between these groups dominate the polysiloxane chain behavior in good solvents. For these polysiloxanes, the expansion factor value is analyzed and the influence of solvent on the polymer's unperturbed dimensions is discussed. Poly(methylhexylsiloxane) and poly(methylhexadecylsiloxane) show a spherical conformation in both solvents. This conformation may arise from strong interactions between the bulky side groups and the main chain. Olayo, R. aut Cervantes, J. aut Enthalten in Journal of inorganic and organometallic polymers and materials Kluwer Academic Publishers-Plenum Publishers, 1991 13(2003), 4 vom: Dez., Seite 205-222 (DE-627)130968625 (DE-600)1069621-0 (DE-576)029153867 1574-1443 nnns volume:13 year:2003 number:4 month:12 pages:205-222 https://doi.org/10.1023/A:1026191926742 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-CHE SSG-OLC-PHA SSG-OLC-DE-84 GBV_ILN_21 GBV_ILN_40 GBV_ILN_70 GBV_ILN_2005 AR 13 2003 4 12 205-222 |
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10.1023/A:1026191926742 doi (DE-627)OLC2061505074 (DE-He213)A:1026191926742-p DE-627 ger DE-627 rakwb eng 660 VZ Villegas, J. A. verfasserin aut Effect of Side Groups on the Conformation of a Series of Polysiloxanes in Solution 2003 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Plenum Publishing Corporation 2003 Abstract The molecular conformation has been obtained for polysiloxane chains in which the pairs of substituents bonded at the silicon atom are $ CH_{3} $, $ CH_{3} $; $ C_{2} $$ H_{5} $, $ C_{2} $$ H_{5} $; $ CH_{3} $, $ C_{6} $$ H_{13} $; $ CH_{3} $, $ C_{16} $$ H_{33} $; and $ CH_{3} $, $ C_{6} $$ H_{5} $. Polysiloxanes dissolved in toluene and benzene were studied using a coupled system: Gel Permeation Chromatography/Light Scattering (GPC/LS). Attention was focused on the influence in the molecular conformation of the quality of the solvent and the type of substituent on the main chain. The results obtained were strongly dependent on the side group size and flexibility. Poly(dimethylsiloxane) samples of 273,400 and 97,600 daltons showed a semi-flexible conformation, but the sample of relatively low molecular weight (36×$ 10^{3} $ daltons) exhibited a slope of 0.6 in good solvents; i.e., demonstrated the behavior of dilute (non-overlapping) coils in a good solvent. With respect to the poly(diethylsiloxane), the source of the coil's expansion is the high mobility of the side chains. Poly(methylphenylsiloxane) exhibits a rigid rod conformation in both solvents. The orientation of the phenyl groups and the attractive interaction between these groups dominate the polysiloxane chain behavior in good solvents. For these polysiloxanes, the expansion factor value is analyzed and the influence of solvent on the polymer's unperturbed dimensions is discussed. Poly(methylhexylsiloxane) and poly(methylhexadecylsiloxane) show a spherical conformation in both solvents. This conformation may arise from strong interactions between the bulky side groups and the main chain. Olayo, R. aut Cervantes, J. aut Enthalten in Journal of inorganic and organometallic polymers and materials Kluwer Academic Publishers-Plenum Publishers, 1991 13(2003), 4 vom: Dez., Seite 205-222 (DE-627)130968625 (DE-600)1069621-0 (DE-576)029153867 1574-1443 nnns volume:13 year:2003 number:4 month:12 pages:205-222 https://doi.org/10.1023/A:1026191926742 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-CHE SSG-OLC-PHA SSG-OLC-DE-84 GBV_ILN_21 GBV_ILN_40 GBV_ILN_70 GBV_ILN_2005 AR 13 2003 4 12 205-222 |
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10.1023/A:1026191926742 doi (DE-627)OLC2061505074 (DE-He213)A:1026191926742-p DE-627 ger DE-627 rakwb eng 660 VZ Villegas, J. A. verfasserin aut Effect of Side Groups on the Conformation of a Series of Polysiloxanes in Solution 2003 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Plenum Publishing Corporation 2003 Abstract The molecular conformation has been obtained for polysiloxane chains in which the pairs of substituents bonded at the silicon atom are $ CH_{3} $, $ CH_{3} $; $ C_{2} $$ H_{5} $, $ C_{2} $$ H_{5} $; $ CH_{3} $, $ C_{6} $$ H_{13} $; $ CH_{3} $, $ C_{16} $$ H_{33} $; and $ CH_{3} $, $ C_{6} $$ H_{5} $. Polysiloxanes dissolved in toluene and benzene were studied using a coupled system: Gel Permeation Chromatography/Light Scattering (GPC/LS). Attention was focused on the influence in the molecular conformation of the quality of the solvent and the type of substituent on the main chain. The results obtained were strongly dependent on the side group size and flexibility. Poly(dimethylsiloxane) samples of 273,400 and 97,600 daltons showed a semi-flexible conformation, but the sample of relatively low molecular weight (36×$ 10^{3} $ daltons) exhibited a slope of 0.6 in good solvents; i.e., demonstrated the behavior of dilute (non-overlapping) coils in a good solvent. With respect to the poly(diethylsiloxane), the source of the coil's expansion is the high mobility of the side chains. Poly(methylphenylsiloxane) exhibits a rigid rod conformation in both solvents. The orientation of the phenyl groups and the attractive interaction between these groups dominate the polysiloxane chain behavior in good solvents. For these polysiloxanes, the expansion factor value is analyzed and the influence of solvent on the polymer's unperturbed dimensions is discussed. Poly(methylhexylsiloxane) and poly(methylhexadecylsiloxane) show a spherical conformation in both solvents. This conformation may arise from strong interactions between the bulky side groups and the main chain. Olayo, R. aut Cervantes, J. aut Enthalten in Journal of inorganic and organometallic polymers and materials Kluwer Academic Publishers-Plenum Publishers, 1991 13(2003), 4 vom: Dez., Seite 205-222 (DE-627)130968625 (DE-600)1069621-0 (DE-576)029153867 1574-1443 nnns volume:13 year:2003 number:4 month:12 pages:205-222 https://doi.org/10.1023/A:1026191926742 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-CHE SSG-OLC-PHA SSG-OLC-DE-84 GBV_ILN_21 GBV_ILN_40 GBV_ILN_70 GBV_ILN_2005 AR 13 2003 4 12 205-222 |
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10.1023/A:1026191926742 doi (DE-627)OLC2061505074 (DE-He213)A:1026191926742-p DE-627 ger DE-627 rakwb eng 660 VZ Villegas, J. A. verfasserin aut Effect of Side Groups on the Conformation of a Series of Polysiloxanes in Solution 2003 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Plenum Publishing Corporation 2003 Abstract The molecular conformation has been obtained for polysiloxane chains in which the pairs of substituents bonded at the silicon atom are $ CH_{3} $, $ CH_{3} $; $ C_{2} $$ H_{5} $, $ C_{2} $$ H_{5} $; $ CH_{3} $, $ C_{6} $$ H_{13} $; $ CH_{3} $, $ C_{16} $$ H_{33} $; and $ CH_{3} $, $ C_{6} $$ H_{5} $. Polysiloxanes dissolved in toluene and benzene were studied using a coupled system: Gel Permeation Chromatography/Light Scattering (GPC/LS). Attention was focused on the influence in the molecular conformation of the quality of the solvent and the type of substituent on the main chain. The results obtained were strongly dependent on the side group size and flexibility. Poly(dimethylsiloxane) samples of 273,400 and 97,600 daltons showed a semi-flexible conformation, but the sample of relatively low molecular weight (36×$ 10^{3} $ daltons) exhibited a slope of 0.6 in good solvents; i.e., demonstrated the behavior of dilute (non-overlapping) coils in a good solvent. With respect to the poly(diethylsiloxane), the source of the coil's expansion is the high mobility of the side chains. Poly(methylphenylsiloxane) exhibits a rigid rod conformation in both solvents. The orientation of the phenyl groups and the attractive interaction between these groups dominate the polysiloxane chain behavior in good solvents. For these polysiloxanes, the expansion factor value is analyzed and the influence of solvent on the polymer's unperturbed dimensions is discussed. Poly(methylhexylsiloxane) and poly(methylhexadecylsiloxane) show a spherical conformation in both solvents. This conformation may arise from strong interactions between the bulky side groups and the main chain. Olayo, R. aut Cervantes, J. aut Enthalten in Journal of inorganic and organometallic polymers and materials Kluwer Academic Publishers-Plenum Publishers, 1991 13(2003), 4 vom: Dez., Seite 205-222 (DE-627)130968625 (DE-600)1069621-0 (DE-576)029153867 1574-1443 nnns volume:13 year:2003 number:4 month:12 pages:205-222 https://doi.org/10.1023/A:1026191926742 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-CHE SSG-OLC-PHA SSG-OLC-DE-84 GBV_ILN_21 GBV_ILN_40 GBV_ILN_70 GBV_ILN_2005 AR 13 2003 4 12 205-222 |
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10.1023/A:1026191926742 doi (DE-627)OLC2061505074 (DE-He213)A:1026191926742-p DE-627 ger DE-627 rakwb eng 660 VZ Villegas, J. A. verfasserin aut Effect of Side Groups on the Conformation of a Series of Polysiloxanes in Solution 2003 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Plenum Publishing Corporation 2003 Abstract The molecular conformation has been obtained for polysiloxane chains in which the pairs of substituents bonded at the silicon atom are $ CH_{3} $, $ CH_{3} $; $ C_{2} $$ H_{5} $, $ C_{2} $$ H_{5} $; $ CH_{3} $, $ C_{6} $$ H_{13} $; $ CH_{3} $, $ C_{16} $$ H_{33} $; and $ CH_{3} $, $ C_{6} $$ H_{5} $. Polysiloxanes dissolved in toluene and benzene were studied using a coupled system: Gel Permeation Chromatography/Light Scattering (GPC/LS). Attention was focused on the influence in the molecular conformation of the quality of the solvent and the type of substituent on the main chain. The results obtained were strongly dependent on the side group size and flexibility. Poly(dimethylsiloxane) samples of 273,400 and 97,600 daltons showed a semi-flexible conformation, but the sample of relatively low molecular weight (36×$ 10^{3} $ daltons) exhibited a slope of 0.6 in good solvents; i.e., demonstrated the behavior of dilute (non-overlapping) coils in a good solvent. With respect to the poly(diethylsiloxane), the source of the coil's expansion is the high mobility of the side chains. Poly(methylphenylsiloxane) exhibits a rigid rod conformation in both solvents. The orientation of the phenyl groups and the attractive interaction between these groups dominate the polysiloxane chain behavior in good solvents. For these polysiloxanes, the expansion factor value is analyzed and the influence of solvent on the polymer's unperturbed dimensions is discussed. Poly(methylhexylsiloxane) and poly(methylhexadecylsiloxane) show a spherical conformation in both solvents. This conformation may arise from strong interactions between the bulky side groups and the main chain. Olayo, R. aut Cervantes, J. aut Enthalten in Journal of inorganic and organometallic polymers and materials Kluwer Academic Publishers-Plenum Publishers, 1991 13(2003), 4 vom: Dez., Seite 205-222 (DE-627)130968625 (DE-600)1069621-0 (DE-576)029153867 1574-1443 nnns volume:13 year:2003 number:4 month:12 pages:205-222 https://doi.org/10.1023/A:1026191926742 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-CHE SSG-OLC-PHA SSG-OLC-DE-84 GBV_ILN_21 GBV_ILN_40 GBV_ILN_70 GBV_ILN_2005 AR 13 2003 4 12 205-222 |
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660 VZ Effect of Side Groups on the Conformation of a Series of Polysiloxanes in Solution |
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Effect of Side Groups on the Conformation of a Series of Polysiloxanes in Solution |
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Effect of Side Groups on the Conformation of a Series of Polysiloxanes in Solution |
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Villegas, J. A. |
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Journal of inorganic and organometallic polymers and materials |
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Journal of inorganic and organometallic polymers and materials |
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2003 |
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Villegas, J. A. Olayo, R. Cervantes, J. |
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Villegas, J. A. |
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effect of side groups on the conformation of a series of polysiloxanes in solution |
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Effect of Side Groups on the Conformation of a Series of Polysiloxanes in Solution |
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Abstract The molecular conformation has been obtained for polysiloxane chains in which the pairs of substituents bonded at the silicon atom are $ CH_{3} $, $ CH_{3} $; $ C_{2} $$ H_{5} $, $ C_{2} $$ H_{5} $; $ CH_{3} $, $ C_{6} $$ H_{13} $; $ CH_{3} $, $ C_{16} $$ H_{33} $; and $ CH_{3} $, $ C_{6} $$ H_{5} $. Polysiloxanes dissolved in toluene and benzene were studied using a coupled system: Gel Permeation Chromatography/Light Scattering (GPC/LS). Attention was focused on the influence in the molecular conformation of the quality of the solvent and the type of substituent on the main chain. The results obtained were strongly dependent on the side group size and flexibility. Poly(dimethylsiloxane) samples of 273,400 and 97,600 daltons showed a semi-flexible conformation, but the sample of relatively low molecular weight (36×$ 10^{3} $ daltons) exhibited a slope of 0.6 in good solvents; i.e., demonstrated the behavior of dilute (non-overlapping) coils in a good solvent. With respect to the poly(diethylsiloxane), the source of the coil's expansion is the high mobility of the side chains. Poly(methylphenylsiloxane) exhibits a rigid rod conformation in both solvents. The orientation of the phenyl groups and the attractive interaction between these groups dominate the polysiloxane chain behavior in good solvents. For these polysiloxanes, the expansion factor value is analyzed and the influence of solvent on the polymer's unperturbed dimensions is discussed. Poly(methylhexylsiloxane) and poly(methylhexadecylsiloxane) show a spherical conformation in both solvents. This conformation may arise from strong interactions between the bulky side groups and the main chain. © Plenum Publishing Corporation 2003 |
| abstractGer |
Abstract The molecular conformation has been obtained for polysiloxane chains in which the pairs of substituents bonded at the silicon atom are $ CH_{3} $, $ CH_{3} $; $ C_{2} $$ H_{5} $, $ C_{2} $$ H_{5} $; $ CH_{3} $, $ C_{6} $$ H_{13} $; $ CH_{3} $, $ C_{16} $$ H_{33} $; and $ CH_{3} $, $ C_{6} $$ H_{5} $. Polysiloxanes dissolved in toluene and benzene were studied using a coupled system: Gel Permeation Chromatography/Light Scattering (GPC/LS). Attention was focused on the influence in the molecular conformation of the quality of the solvent and the type of substituent on the main chain. The results obtained were strongly dependent on the side group size and flexibility. Poly(dimethylsiloxane) samples of 273,400 and 97,600 daltons showed a semi-flexible conformation, but the sample of relatively low molecular weight (36×$ 10^{3} $ daltons) exhibited a slope of 0.6 in good solvents; i.e., demonstrated the behavior of dilute (non-overlapping) coils in a good solvent. With respect to the poly(diethylsiloxane), the source of the coil's expansion is the high mobility of the side chains. Poly(methylphenylsiloxane) exhibits a rigid rod conformation in both solvents. The orientation of the phenyl groups and the attractive interaction between these groups dominate the polysiloxane chain behavior in good solvents. For these polysiloxanes, the expansion factor value is analyzed and the influence of solvent on the polymer's unperturbed dimensions is discussed. Poly(methylhexylsiloxane) and poly(methylhexadecylsiloxane) show a spherical conformation in both solvents. This conformation may arise from strong interactions between the bulky side groups and the main chain. © Plenum Publishing Corporation 2003 |
| abstract_unstemmed |
Abstract The molecular conformation has been obtained for polysiloxane chains in which the pairs of substituents bonded at the silicon atom are $ CH_{3} $, $ CH_{3} $; $ C_{2} $$ H_{5} $, $ C_{2} $$ H_{5} $; $ CH_{3} $, $ C_{6} $$ H_{13} $; $ CH_{3} $, $ C_{16} $$ H_{33} $; and $ CH_{3} $, $ C_{6} $$ H_{5} $. Polysiloxanes dissolved in toluene and benzene were studied using a coupled system: Gel Permeation Chromatography/Light Scattering (GPC/LS). Attention was focused on the influence in the molecular conformation of the quality of the solvent and the type of substituent on the main chain. The results obtained were strongly dependent on the side group size and flexibility. Poly(dimethylsiloxane) samples of 273,400 and 97,600 daltons showed a semi-flexible conformation, but the sample of relatively low molecular weight (36×$ 10^{3} $ daltons) exhibited a slope of 0.6 in good solvents; i.e., demonstrated the behavior of dilute (non-overlapping) coils in a good solvent. With respect to the poly(diethylsiloxane), the source of the coil's expansion is the high mobility of the side chains. Poly(methylphenylsiloxane) exhibits a rigid rod conformation in both solvents. The orientation of the phenyl groups and the attractive interaction between these groups dominate the polysiloxane chain behavior in good solvents. For these polysiloxanes, the expansion factor value is analyzed and the influence of solvent on the polymer's unperturbed dimensions is discussed. Poly(methylhexylsiloxane) and poly(methylhexadecylsiloxane) show a spherical conformation in both solvents. This conformation may arise from strong interactions between the bulky side groups and the main chain. © Plenum Publishing Corporation 2003 |
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Effect of Side Groups on the Conformation of a Series of Polysiloxanes in Solution |
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