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유연쇄를 사용한 개질 폴리에스터 공중합체의 제조와 그 특성(II) -Neopentyl glycol 단위체를 함유한 공중합 폴리에스터의 결정화 거동-
Synthesis and Properties of Modified Copolyesters Containing Flexible Chain Moiety(II) -The Crystallization Behavior of Copolyesters Based on Neopentyl Glycol-

손태원    (영남대학교 섬유패션학부   ); 한송정    (영남대학교 섬유공학과   ); 고재왕    (영남대학교 섬유공학과   ); 이건민    ((주)코오롱 FM 연구소  );
  • 초록

    Poly(ethyleneterephthalate)(PET) was chemically modified through copolymerization of bis(2-hydroxyethyl) terephthalate (BHET) and neopentyl glycol (NPG). NPG was used as flexible chain moiety to enhance spinnability by retarding the stress-induced crystallization during spinning. The properties of the copolyester were investigated by using GPC, DSC(differential scanning calorimetry), TGA(thermogravimetry analysis), and $^1H-NMR$ . From the result of GPC, it was found that the copolyesters were able to get higher molecular weight and narrower molecular weight distribution than those of PET obtained from BHET alone. Non-isothermal crystallization behavior of the copolymers was investigated by differential scanning calorimetry (DSC). Non-isothermal crystallization measurements showed that, with increasing the amount of comonomer, Tcm decreased.. It seems that the rate of crystallization of copolymer might be retarded during melt-spinning. Isothermal melt-crystallization measurement demonstrated that the rate of crystallization and the Avrami index were reduced with increasing the amount of comonomer.


  • 주제어

    PET .   BHET .   NGP .   copolymer .   flexible chain.  

  • 참고문헌 (25)

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