Textile Science and Engineering (한국섬유공학회지)

The Korean Fiber Society (한국섬유공학회)
권호 표지

Synthesis and Properties of Modified Copolyesters Containing Flexible Chain Moiety(II) -The Crystallization Behavior of Copolyesters Based on Neopentyl Glycol-

유연쇄를 사용한 개질 폴리에스터 공중합체의 제조와 그 특성(II) -Neopentyl glycol 단위체를 함유한 공중합 폴리에스터의 결정화 거동-

  • Son, Tae-Won (School of Textiles, Yeungnam University) ;
  • Han, Song-Jung (Department of Textile Engineering, Graduate School, Yeungnam University) ;
  • Ko, Jae-Wang (Department of Textile Engineering, Graduate School, Yeungnam University) ;
  • Lee, Gun-Min (HTF Research Team, Kolon Fashion Material Research Institute)
  • Received : 2009.10.04
  • Accepted : 2009.12.09
  • Published : 2009.12.31
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Abstract

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.

Keywords

Acknowledgement

Supported by : 영남대학교

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