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−)

서지정보

· 발행기관 : 한국섬유공학회
· 수록지 정보 : 한국섬유공학회지 / 46권 / 6호 / 303 ~ 310페이지
· 저자명 : 손태원, 한송정, 이건민, 고재왕

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.

영어초록

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.

참고자료

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