The effect of ionic cross-links on the deformation behavior of homoblends made of poly(styrene-co-styrenesulfonic acid) and poly(styrene-co-4-vinylpyridine)

被引：18

作者：

Chen, WJ ^{[1
]}

Sauer, JA ^{[1
]}

Hara, M ^{[1
]}

机构：

[1] Rutgers State Univ, Dept Chem & Biochem Engn, Piscataway, NJ 08854 USA

来源：

POLYMER | 2003年 / 44卷 / 25期

关键词：

ionic cross-links; homoblends; deformation modes;

D O I：

10.1016/j.polymer.2003.09.053

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Deformation behavior of stoichiometric blends made from poly(styrene-co-styrenesulfonic acid) (SPS) and poly(styrene-co-4-vinylpyridine) (SVP) was investigated by TEM observation of strained thin films. An FTIR investigation revealed that ionic cross-links were formed between the component polymers upon blending due to intermolecular ion-ion interactions, which arose from proton transfer from sulfonic acid groups to pyridine groups. TEM observations indicate that the deformation mode of the blends changed from crazing only to crazing plus shear deformation, with the shear contribution becoming larger, as the ion content in the blends increased. Such changes in deformation mode can be understood as arising from an increase in the 'effective' strand density due to the formation of ionic cross-links upon blending. It was also found that the ionic cross-links via pyridinium cation/sulfonate anion ion pairs were More effective in inducing the transition of deformation mode than ionic cross-links via -SO3-/Na+ or -SO3-/Ca2+ ion pairs. (C) 2003 Elsevier Ltd. All rights reserved.

引用

页码：7729 / 7738

页数：10

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