폴리트리메틸렌테레프탈레이트 및 폴리테트라메틸렌에테르글리콜 구조를 갖는 세그멘트화 블록 코폴리에테르에스테르 고무탄성체의 합성과 물성(I) -합성과 열적성질

Synthesis and Properties of Segmented Block Copolyetherester Elastomers Based on Poly(trimethylene terephthalate) and Poly(tetramethylene ether glycol)(I) -Synthesis and Thermal Properties-

Segmented block cololyetheresters based on poly(trimethylene terephthalate) and poly(teramethylene ether glycol) (3GT/PTMGT) were synthesized with various hard segment contents. The number average molecular weights of PTMG selected were 1000, 2000, and 2900. Copolymer composition was determined by $^{1}H$-NMR experiment. The effects of hard segment content and hard segment length on the thermal properties of copolytheresters were studied. 3GT/PTMGT showed higher melting temperature and higher crystallinity than 4GT/PTMGT of the same hard segment content.