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

共 5 条

[1] Quantifying plasticization and melting behavior of poly(vinylidene fluoride) in supercritical CO2 utilizing a linear variable differential transformer
Shenoy, SL
Fujiwara, T
Wynne, KJ
[J]. MACROMOLECULES, 2003, 36 (09) : 3380 - 3385
[2] Measurement of Supercritical CO2 Plasticization of Poly(tetrafluoroethylene) Using a Linear Variable Differential Transformer
Guney-Altay, Ozge
Shenoy, Suresh L.
Fujiwara, Tomoko
Irie, Sadashige
Wynne, Kenneth J.
[J]. MACROMOLECULES, 2008, 41 (22) : 8660 - 8668
[3] Supercritical and liquid CO2: Polymer swelling and effects on melting behavior.
Wynne, KJ
Shenoy, SL
Fujiwara, T
Irie, S
Woerdeman, D
Sebra, R
Garach, A
McHugh, MA
[J]. ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, 2002, 224 : U469 - U469
[4] Grafting of maleic anhydride onto styrene-butadiene-styrene triblock copolymer using supercritical CO2 as a swelling agent
Li, Chunsheng
Zhang, Shuxiang
Zheng, Anna
Kong, Xiangzheng
Geng, Bing
[J]. JOURNAL OF APPLIED POLYMER SCIENCE, 2006, 102 (05) : 4425 - 4429
[5] Quantifying supercritical CO2 dilation of poly(vinylidene fluoride) and poly(vinylidene fluoride-co-hexafluoro-propylene) utilizing a linear variable differential transducer:: Plasticization and melting behavior
Shenoy, SL
Fujiwara, T
Wynne, KJ
[J]. MACROMOLECULAR SYMPOSIA, 2003, 201 : 171 - 178

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