Preparation of Porous Thermoset Polyurethane with Supercritical CO2 as Non-solvent

Most of porous polymer materials are mainly prepared by solution phase inversion method. The de-mixing process can be initiated by diffusive solvent/non-solvent exchange of binary, ternary or multicomponent mixture. Recently, supercritical CO2 (ScCO2) is used as a non-solvent to prepare porous polym...
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Autor*in:	Mohsen Izadi [verfasserIn] Mohammad Hossein Navid Famili [verfasserIn] Zahra Maghsoud [verfasserIn]

Format:	E-Artikel
Sprache:	Persisch

Erschienen:	2015

Schlagwörter:	phase inversion thermoset polyurethane cells and pores size distribution nucleation and growth spinodal de-mixing

Übergeordnetes Werk:	In: علوم و تکنولوژی پلیمر - Iran Polymer and Petrochemical Institute, 2018, 28(2015), 2, Seite 109-101
Übergeordnetes Werk:	volume:28 ; year:2015 ; number:2 ; pages:109-101

Links:	Link aufrufen Link aufrufen Link aufrufen Journal toc Journal toc

DOI / URN:	10.22063/jipst.2015.1237

Katalog-ID:	DOAJ04888183X

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language	Persian
source	In علوم و تکنولوژی پلیمر 28(2015), 2, Seite 109-101 volume:28 year:2015 number:2 pages:109-101
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topic_facet	phase inversion thermoset polyurethane cells and pores size distribution nucleation and growth spinodal de-mixing Polymers and polymer manufacture
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callnumber-first	T - Technology
author	Mohsen Izadi
spellingShingle	Mohsen Izadi misc TP1080-1185 misc phase inversion misc thermoset polyurethane misc cells and pores size distribution misc nucleation and growth misc spinodal de-mixing misc Polymers and polymer manufacture Preparation of Porous Thermoset Polyurethane with Supercritical CO2 as Non-solvent
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topic_title	TP1080-1185 Preparation of Porous Thermoset Polyurethane with Supercritical CO2 as Non-solvent phase inversion thermoset polyurethane cells and pores size distribution nucleation and growth spinodal de-mixing
topic	misc TP1080-1185 misc phase inversion misc thermoset polyurethane misc cells and pores size distribution misc nucleation and growth misc spinodal de-mixing misc Polymers and polymer manufacture
topic_unstemmed	misc TP1080-1185 misc phase inversion misc thermoset polyurethane misc cells and pores size distribution misc nucleation and growth misc spinodal de-mixing misc Polymers and polymer manufacture
topic_browse	misc TP1080-1185 misc phase inversion misc thermoset polyurethane misc cells and pores size distribution misc nucleation and growth misc spinodal de-mixing misc Polymers and polymer manufacture
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title	Preparation of Porous Thermoset Polyurethane with Supercritical CO2 as Non-solvent
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title_full	Preparation of Porous Thermoset Polyurethane with Supercritical CO2 as Non-solvent
author_sort	Mohsen Izadi
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author_browse	Mohsen Izadi Mohammad Hossein Navid Famili Zahra Maghsoud
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title_sort	preparation of porous thermoset polyurethane with supercritical co2 as non-solvent
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title_auth	Preparation of Porous Thermoset Polyurethane with Supercritical CO2 as Non-solvent
abstract	Most of porous polymer materials are mainly prepared by solution phase inversion method. The de-mixing process can be initiated by diffusive solvent/non-solvent exchange of binary, ternary or multicomponent mixture. Recently, supercritical CO2 (ScCO2) is used as a non-solvent to prepare porous polymers. ScCO2 possesses excellent properties, such as environmental friendliness, liquid-like density and gas-like diffusivity in comparison with conventional liquid non-solvents. Porous polyurethane was prepared from polymer/N-dimethylformamide (DMF) solution using a supercritical fluid-phase inversion process in which carbon dioxide acted as the non-solvent. The effects of time delay, casting temperature and ratio of polyol/chain extender (POL/CE) on the membrane morphology and structure (size and distribution of cells and pores, thickness of dense layer and porosity) were studied. According to the results, a minimum time delay of 120 min was determined for formation of a suitable structure. The dense layer of 77.6 μm thickness was decreased to 43.1 μm by lowering casting temperature from 55°C to 35°C. The ratio of POL/CE influenced the thermodynamic and kinetic properties. A decrease in POL/CE ratio led to formation of smaller and uniform cells and increased porosity. On decreasing the ratio of POL/CE from 2 to 0.25, the mean diameter of the cells at 6.3 μm dropped to 3 μm.
abstractGer	Most of porous polymer materials are mainly prepared by solution phase inversion method. The de-mixing process can be initiated by diffusive solvent/non-solvent exchange of binary, ternary or multicomponent mixture. Recently, supercritical CO2 (ScCO2) is used as a non-solvent to prepare porous polymers. ScCO2 possesses excellent properties, such as environmental friendliness, liquid-like density and gas-like diffusivity in comparison with conventional liquid non-solvents. Porous polyurethane was prepared from polymer/N-dimethylformamide (DMF) solution using a supercritical fluid-phase inversion process in which carbon dioxide acted as the non-solvent. The effects of time delay, casting temperature and ratio of polyol/chain extender (POL/CE) on the membrane morphology and structure (size and distribution of cells and pores, thickness of dense layer and porosity) were studied. According to the results, a minimum time delay of 120 min was determined for formation of a suitable structure. The dense layer of 77.6 μm thickness was decreased to 43.1 μm by lowering casting temperature from 55°C to 35°C. The ratio of POL/CE influenced the thermodynamic and kinetic properties. A decrease in POL/CE ratio led to formation of smaller and uniform cells and increased porosity. On decreasing the ratio of POL/CE from 2 to 0.25, the mean diameter of the cells at 6.3 μm dropped to 3 μm.
abstract_unstemmed	Most of porous polymer materials are mainly prepared by solution phase inversion method. The de-mixing process can be initiated by diffusive solvent/non-solvent exchange of binary, ternary or multicomponent mixture. Recently, supercritical CO2 (ScCO2) is used as a non-solvent to prepare porous polymers. ScCO2 possesses excellent properties, such as environmental friendliness, liquid-like density and gas-like diffusivity in comparison with conventional liquid non-solvents. Porous polyurethane was prepared from polymer/N-dimethylformamide (DMF) solution using a supercritical fluid-phase inversion process in which carbon dioxide acted as the non-solvent. The effects of time delay, casting temperature and ratio of polyol/chain extender (POL/CE) on the membrane morphology and structure (size and distribution of cells and pores, thickness of dense layer and porosity) were studied. According to the results, a minimum time delay of 120 min was determined for formation of a suitable structure. The dense layer of 77.6 μm thickness was decreased to 43.1 μm by lowering casting temperature from 55°C to 35°C. The ratio of POL/CE influenced the thermodynamic and kinetic properties. A decrease in POL/CE ratio led to formation of smaller and uniform cells and increased porosity. On decreasing the ratio of POL/CE from 2 to 0.25, the mean diameter of the cells at 6.3 μm dropped to 3 μm.
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title_short	Preparation of Porous Thermoset Polyurethane with Supercritical CO2 as Non-solvent
url	https://doi.org/10.22063/jipst.2015.1237 https://doaj.org/article/42babda8a7384ac5ba14440ebde60d9d http://jips.ippi.ac.ir/article_1237_c5ccc6e5f59cb045fbc2d3c479bab0ce.pdf https://doaj.org/toc/1016-3255 https://doaj.org/toc/2008-0883
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author2	Mohammad Hossein Navid Famili Zahra Maghsoud
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up_date	2024-07-03T20:12:21.107Z
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Preparation of Porous Thermoset Polyurethane with Supercritical CO2 as Non-solvent

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