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Preparation and Physical Properties of Biodegradable Poly(ι-lactide) Nanocomposites  

이무성 (전남대학교 응용화학부)
김현주 (전남대학교 응용화학부)
최창남 (전남대학교 응용화학부)
김영대 (전남대학교 응용화학부)
이기영 (전남대학교 화학공학부)
고문배 (서울대학교 화학공학부)
Publication Information
Textile Science and Engineering / v.39, no.2, 2002 , pp. 159-166 More about this Journal
Abstract
Nanocomposites of poly(ι-lactide) (PLA) and organosilicate were prepared using a melt mixing method. PLA nanocomposites with partially exfoliated structure can be prepared, only when an organic modifier present in organosilicates, Cloisite 30B. in this study, interacts favorably with PLA. The partially exfoliated silicate layers increase the crystallization rate of PLA and dynamic storage moduli of PLA below the T$_{g}$ of PLA. However, the increase in crystallization rate and storage moduli is also accompanied by the formation of low molecular weight oligomers of PLA during sample preparation, verified by GPC measurement. As the content of 303 increases the tonsils modulus of PLA/30B nanocomposites increases but the tensile strength and the strain at break decrease. The drop is attributed to the formation of non-exfoliated aggregates at higher organosilicate contents. the insufficient adhesion between PLA and silicate layers, and the formation of PLA oligomers.s.
Keywords
nanocomposite; pc Iylactide; organosilica to; exfoliation;
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