Quantifying polymer swelling employing a linear variable differential transformer:: CO2 effects on SBS triblock copolymer

被引：13

作者：

Shenoy, S ^{[1
]}

Woerdeman, D ^{[1
]}

Sebra, R ^{[1
]}

Garach-Domech, A ^{[1
]}

Wynne, KJ ^{[1
]}

机构：

[1] Virginia Commonwealth Univ, Dept Chem Engn, Richmond, VA 23284 USA

来源：

MACROMOLECULAR RAPID COMMUNICATIONS | 2002年 / 23卷 / 18期

关键词：

block copolymers; CO2; density; LVDT; SBS; swelling;

D O I：

10.1002/marc.200290007

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

A linear variable differential transformer (LVDT) was employed to evaluate CO2-polymer plasticization. Preliminary results on polystyrene-block-polybutadiene-block-polystyrene (SBS) elastomer are presented. At 22degreesC under CO2 pressure, SBS undergoes compression due hydrostatic pressure. However, sample expansion occurs upon depressurization.At 45degreesC, SBS undergoes swelling of 0.7% due to CO2 plasticization, while no post-pressurization expansion is observed. The contrasting result is explained by change in PS domain mobility and discontinuity in the density-pressure relationship.

引用

页码：1130 / 1133

页数：4

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