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Crystallization Behavior of Poly(lactic acid) / Poly($\varepsilon$-caprolactone) Blends  

이종록 (기능성고분자 신소재연구센터, 단국대학교 고분자공학과)
천상욱 (서울대학교 재료공학부)
강호종 (기능성고분자 신소재연구센터, 단국대학교 고분자공학과)
Publication Information
Polymer(Korea) / v.27, no.4, 2003 , pp. 285-292 More about this Journal
Abstract
The compatibility of poly(lactic acid)/poly($\varepsilon$-caprolactone) (PLA/PCL) blends as a function of blend composition was studied and triphenyl phosphite (TPP) was applied to PLA/PCL blends as a reactive compatibilizer. Especially the effect of compatibility on the crystallization behavior in both PLA/PCL blends and PLA/PCL blends with TPP was considered. PLA/PCL blends were immiscible based on thermal characteristics of PLA/PCL blends and the miscibility was depend upon the blend composition. The enhancement of compatibility was found in PLA/PCL blends with TPP depend upon its content. The rate of crystallization in PLA/PCL blend varied with blend composition. This was understood as the development of nucleation at the interface of PLA-PCL due to the immiscibility. TPP was acting as a compatibilizer as well as an agent for the acceleration of spherulite growth In PLA. As a result, the crystallization rate increased and the size of spherulite became larger than that of PLA/PCL blend without TPP.
Keywords
poly(lactic acid); poly($\varepsilon$-caprolactone); blend; crystallization; compatibilizer; triphenyl pho sphite;
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