Multiscale porosity from thermoreversible poly(vinylidene fluoride) gels in diethyl azelate

被引：3

作者：

Dasgupta, D ^{[1
]}

Nandi, AK ^{[1
]}

机构：

[1] Indian Assoc Cultivat Sci, Polymer Sci Unit, Kolkata 700032, W Bengal, India

来源：

MACROMOLECULAR SYMPOSIA | 2005年 / 222卷

关键词：

BJH isotherm; macroporosity; mercury intrusion porosimetry; mesoporosity; thermoreversible gel; CHANNEL STRUCTURES; GELATION;

D O I：

10.1002/masy.200550408

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Poly(vinylidene fluoride) (PVF2) produces thermoreversible gets in a series of diesters. The polymer-solvent complexation occurred for intermittent number of carbon atoms n >= 2 and the enthalpy of complexation increased with increasing n. The gels were dried by replacing the diesters with low boiling solvent like cyclohexane (bp. 80 degrees C) and methylcyclohexane (bp. 99 degrees C). The porosity of the dried gels was measured using Poremaster-60. For PVF2-DEAZ gel meso and macro porosity have been observed. The former pore dimensions have been attributed for polymer-solvent complexation while the macroporosity has been attributed for caging of solvent between the PVF2 fibrils The porosity measured from nitrogen adsorption isotherms using BJH method indicate presence of minimum pore diameter of 3.8 rim for the 10% dried gel of PVF2.

引用

页码：81 / 86

页数：6

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