Crystallization behavior of poly(L-lactic acid)

被引：231
作者：
Di Lorenzo, ML [1 ]
机构：
[1] Ist Chim & Tecnol Polimeri CNR, Pozzuoli, NA, Italy
来源：
EUROPEAN POLYMER JOURNAL | 2005年 / 41卷 / 03期
关键词：
poly(L-lactic acid); crystallization kinetics; morphology;
D O I：
10.1016/j.eurpolymj.2004.10.020
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
This article contains a detailed analysis of the crystallization behavior of poly(L-lactic acid) (PLLA). Crystallization rates of PLLA have been measured in a wide temperature range, using both isothermal and non-isothermal methods. The combined usage of multiple thermal treatments allowed to obtain information on crystallization kinetics of PLLA at temperatures almost ranging from glass transition to melting point. Crystallization rate of PLLA is very high at temperatures between 100 and 118 degreesC, showing a clear deviation from the usual bell-shaped curve. This discontinuity has been ascribed to a sudden acceleration in spherulite growth, and is not associated to morphological changes in the appearance of PLLA spherulites. Experimental data of spherulite growth rates of PLLA have been analyzed with Hoffman-Lauritzen method. Applicability and limitations of this theoretical treatment have been discussed. (C) 2004 Elsevier Ltd. All rights reserved.
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页码：569 / 575
页数：7
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