Characteristics of the phase transition of poly(siloxane/ether urethane) copolymers

Hung Yi Tsi, Chien Chung Chen, Wen Chin Tsen, Yao Chi Shu, Fu Sheng Chuang

研究成果: 雜誌貢獻文章同行評審

12 引文 斯高帕斯(Scopus)

摘要

The aim of this study is to investigate the characteristics of the phase transition for poly(siloxane/ether urethane) copolymers (PSi-EUs) consisting of PTMG/PDMS mixed soft segments and urethane hard segments by differential scanning calorimetry (DSC) and dynamic mechanical analysis (DMA). PSi-EUs exhibit three regions of amorphous phase transition, involving the PDMS soft phase, the PTMG soft phase and the urethane hard phase; therefore, they display phase separation due to low miscibility. Intermolecular hydrogen bonding, which is key to phase mixing, hence resulting in a low degree of phase separation, occurs between the PTMG soft segments in the PTMG/PDMS mixed soft phase and the urethane hard segments. Accordingly, the PSi-EUs are superior to poly(siloxane urethane) copolymer (PSiU) in terms of tensile strength due to the low phase separation and strain-induced crystallization resulting from PTMG soft segments.

原文英語
頁(從 - 到)50-59
頁數10
期刊Polymer Testing
30
發行號1
DOIs
出版狀態已發佈 - 二月 2011

ASJC Scopus subject areas

  • 有機化學
  • 聚合物和塑料

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