The effects of solvent type and aging on structural development in poly(vinyl chloride) thermoreversible gels

被引：1
作者：
Hwang, Minkyu [1 ]
Yang, Hoichang [1 ,2 ]
Park, Sanghyun [1 ]
Lee, Dae Ho [1 ]
Cho, Kilwon [1 ]
机构：
[1] Pohang Univ Sci & Technol, Polymer Res Inst, Dept Chem Engn, Pohang 790784, South Korea
[2] Rensselaer Polytech Inst, Rensselaer Nanotechnol Ctr, Troy, NY 12180 USA
来源：
JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS | 2008年 / 46卷 / 03期
关键词：
aging; gel network; gels; polyvinyl chloride; SAXS; thermoreversible;
D O I：
10.1002/polb.21363
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
We investigated the effects of solvent type (mono-ester vs. di-ester solvent) and aging on the structural development in the poly(vinyl chloride)/butyl benzoate (PVC/BB) and PVC/dibutyl phthalate(DBP) gels, as well as on their viscoelastic and mechanical behaviors. It was found that aged PVC/DBP gels held at RT for 7 days exhibit an improvement of about 100% in storage modulus (G') compared to fresh gels, with a sudden drop in G' around 50 degrees C, whereas the storage moduli of the PVC/BB gels decrease monotonically with temperature, irrespective of the postaging time. These different behaviors of the PVC/BB and PVC/DBP gels arise mainly because of the difference in the network structure produced by the formation of the polymer-solvent complex between the C = O groups of the solvent and the polarized hydrogen moieties of PVC, as was confirmed with small angle X-ray scattering and uniaxial tensile experiments. (C) 2007 Wiley Periodicals, Inc.
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收藏
页码：263 / 271
页数：9
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