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

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)50-59
Number of pages10
JournalPolymer Testing
Volume30
Issue number1
DOIs
Publication statusPublished - Feb 2011

Fingerprint

Siloxanes
Urethane
Phase separation
Ether
Ethers
Copolymers
Phase transitions
Dynamic mechanical analysis
Differential scanning calorimetry
Hydrogen bonds
Tensile strength
Solubility
Crystallization

Keywords

  • DMA
  • DSC
  • Mixed soft segment
  • Phase transition
  • Poly(siloxane/ether urethane)

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics

Cite this

Characteristics of the phase transition of poly(siloxane/ether urethane) copolymers. / Tsi, Hung Yi; Chen, Chien Chung; Tsen, Wen Chin; Shu, Yao Chi; Chuang, Fu Sheng.

In: Polymer Testing, Vol. 30, No. 1, 02.2011, p. 50-59.

Research output: Contribution to journalArticle

Tsi, Hung Yi ; Chen, Chien Chung ; Tsen, Wen Chin ; Shu, Yao Chi ; Chuang, Fu Sheng. / Characteristics of the phase transition of poly(siloxane/ether urethane) copolymers. In: Polymer Testing. 2011 ; Vol. 30, No. 1. pp. 50-59.
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