• Elastomers and Composites
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• v.49 no.1
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• pp.13-23
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• 2014

In this work, glycolide, L-lactide and ${\varepsilon}$-caprolactone monomers were polymerized into the triblock copolymers by two step polymerization method and their non-isothermal crystallization behaviors were studied by combination of modified Avrami and Ozawa formula for further analysis of their behaviors. The result showed that PGCLA21 gave the highest value for supercooling analysis and super cooling degree increased with L-lactide content. Crystallization velocity constant, however, showed no significant change. The result of cooling function in specific relative crystallization degree showed that the increase of L-lactide content made an effect on the more enhancement of crystallization velocity of the PGCLA than PGCL. The result of big logF(T) value with the L-lactide content above critical point for PGCLA41 and PGCLA21 showed that bigger cooling velocity needed to gain same crystal size compared with PGCL. This means that it gives negative effect in the increase of crystallization velocity.

• Proceedings of the Korean Fiber Society Conference
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• 2001.10a
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• pp.179-182
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• 2001

지방족 폴리에스터는 보통 의료용 고분자 및 환경분해성 고분자로 알려져 왔으며, 이에 따라 지방족 폴리에스터와 그의 공중합물, 그리고 다른 상용고분자와의 블렌드들의 분해 메카니즘에 관한 연구 보고가 이루어져 왔다. 일반적으로 결정성 고분자의 분해성은 일차적인 화학구조외에도 결정의 size나 perfactness, 결정화도 또는 배향도와 같은 미세 구조에 의해서도 크게 영향을 받는다. (중략)