Textile Science and Engineering (한국섬유공학회지)

The Korean Fiber Society (한국섬유공학회)
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Synthesis and Thermal Properties of Segmented Block Copolyetheresters Based on Poly(butylene terephthalate) and Poly(tetramethylene ether glycol)

폴리부틸렌테레프탈레이트 및 폴리테트라메틸렌에테르글리콜의 구조를 갖는 세그멘트된 블록 코폴리에테르에스테르의 합성과 열적 성질

  • 백두현 (충남대학교 공과대학 섬유공학과) ;
  • 이민성 (충남대학교 공과대학 섬유공학과, 충남대학교 공과대학 섬유공학과, 충남대학교 공과대학 섬유공학과, 선경인더스트리 섬유연구소)
  • Published : 1994.08.01

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Abstract

Segmented block copolyetheresters based on poly(butylene terephthalate) and poly(tetramethylene ether glycol) with various hard segment contents were synthesized by equilibrium melt transesteriacation. The copolyetheresters synthesized were found to be true segmented block copolymers from the results of IH-NMR and molting temperature depression data. The copolymers having high hard segment content showed multiple melting behavior, which was thought to be due to melting/recrystallization/ remelting process. The two models for copolyetherester crystallization were examined by checking the relationship between minimum hard segment length for crystallization and melting temperature depression. From the analysis of Flory's melting temperature depression equation. the equilibrium length of crystallite was closely akin to the minimum hard segment length for crystallization calculated on the assumption that all the sequences longer than this minimum length participate in crystallization.

Keywords

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