Article
  • Crystallization Kinetics and Melting Behavior of PET Aminolyzed by PEG-Diamine
  • Kim KJ, Ko SW
  • PEG-Diamine으로 아민분해된 PET의 결정화속도 및 용융거동
  • 김갑진, 고석원
Abstract
The blends of PET/PET-PEG block copolymer with various PEG content(PET-b-PEG) were obtained by aminolyzing PET with PEG-diamine. The crystallization and melting behaviors of PET-b-PEG were investigated with DSC. The rate of crystallization was evaluated by some crystallization rate parameters for both isothermal and non-isothermal crystallizations. The rate of crystallization of PET-b-PEG increases with PEG content upto about 4 wt% due to the ease of nucleation, but the rate decreases steadily with PEG content in the case of more than 4 wt%. PET-b-FEG crystallized from melt with the rate of cooling higher than 14℃/min shows double melting transition. The origin of double melting can be explained as the melting of the original crystal formed from melt and subsequent recrystallization followed by remelting. There is a very good correlation between crystallizability and melting of PET-b-PEG as a function of PEG content.

PET를 PEG-diamine으로 아민분해하여 제조된 PET-PEG 블록중합제/PET 블렌드(PET-b-PEG)의 결정화 및 용융 거동을 DSC결과로 해석하였다. 결정화속도는 등온 및 비등온 결정화에 관한 몇 개의 걸정화속도 parameter로 평가하였다. PEG함량이 4%까지는 PEG함량이 증가에 따사 결정화 속도는 증가하였으나 그 이상의 함량에서는 조금씩 감소하는 경향을 보였다. 14℃/min 이상의 냉각속도로 용융상태로 부터 비등온 결정화한 시료의 용융곡선은 이중용융 특성을 나타냈다. 여기서의 이중용융피크의 근윈은 초기 결정의 용융과 함께 일어나는 재결정화에 의한 결정의 재용응으로 해석가능하였다. PEG-b-PEG의 crystallizability 변화와 이중용융 거동과는 상당히 좋은 상관관계를 보였다.

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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

  • 1990; 14(4): 332-341

    Published online Aug 25, 1990