Article
  • Study on the Randomness of Poly(ethylene naphthalate)/Poly(ε-caprolactone) Copolymer by Melt Blending
  • Kang HJ, Han K, Kim W
  • Poly(ethylene naphthalate)/poly(ε-caprolactone)용융 블렌딩에 의하여 발현된 공중합체의 Randomness에 관한 연구
  • 강호종, 한규일, 김환기
Abstract
It is generally agreed that transesterification provieds the copolymer inthe melt blending of poly(ethylene naphthalate) (PEN) and poly(ε-caprolactone) (PCL). Effects of the conditions of transesterification reaction and catalyst on the degree of randomness and average sequence length of PEN/PCL blends were investigated and results were used to interpret the biodegradability of PEN/PCL blends. It was found that degree of randomness values of obtained copolymer lied between 0 and 1, and it indicated that this blend consisted with physical blends of PEN/PCL and PEN/PCL block copolymers. The degree of randomness reached almost 1 which is the theroretical value of random copolymers and the average sequence length became shorter by the further transesterification reaction. In additions, it was found that the increase of copolymers, especially random copolymers reduced the biodegradability in PEN/PCL blends.

Poly(ethylene naphthalate)/poly(ε-caprolactone) (PEN/PCL)의 용융 블렌딩시 필연적으로 발현되는 상호에스테르 교환반응은 PEN/PCL 공중합체를 형성하게 된다. 블렌드의 조성비, 상호에스테르 교환반응 조건 그리고 사용된 촉매가 형성된 공중합체의 randomness와 평균 sequence length에 미치는 영향을 살펴보고 이들과 블렌드의 생분해 특성과의 관계를 확인하여 보았다. 용융 블렌딩에 의하여 얻어진 PEN/PCL 공중합체는 randomness가 0과 1사이인 것으로 보아 블록 공중합체임을 알 수 있었으며, 열처리 시간과 온도의 증가 그리고 촉매의 첨가에 의하여 randomness가 1에 근접하고 PEN과 PCL의 평균 sequence length 모두 감소하는 것으로 보아 랜덤 공중합체로 변화됨을 확인할 수 있었다. 이러한 공중합체의 생성과 랜덤화는 PEN/PCL 블렌드의 생분해성 감소를 초래함을 알 수 있었다.

Keywords: poly(ethylene naphthalate); poly(ε-caprolactone); copolymers; transesterification; randomness; sequence length

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  • Polymer(Korea) 폴리머
  • Frequency : Bimonthly(odd)
    ISSN 0379-153X(Print)
    ISSN 2234-8077(Online)
    Abbr. Polym. Korea
  • 2022 Impact Factor : 0.4
  • Indexed in SCIE

This Article

  • 2000; 24(5): 664-672

    Published online Sep 25, 2000