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首页> 外文期刊>Journal of Applied Polymer Science >Crystallization of amorphous poly(lactic acid) induced by organic solvents
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Crystallization of amorphous poly(lactic acid) induced by organic solvents

机译：有机溶剂诱导的无定形聚乳酸结晶

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摘要

Crystallization of amorphous poly(lactic acid) (PLA) was investigated in various organic solvents, such as acetone, ethylacetate, diethylether, tetrahydrofurane, methanol, hexane, toluene, xylene, and o-dichlorobenene. Most of the solvents, except hexane, induced crystallization of amorphous PLA. Acetone was the most effective solvent to accelerate the crystallization among the solvents used. The crystallization was induced by permeation of acetone into the amorphous phase of PLA, and the permeation obeyed Fick type diffusion. The crystallization rate increased with increasing of conducting temperature. Crystallized PLA formed α crystalline structure. The permeated acetone in the crystallized PLA gradually evaporated as time passes, and the elimination of acetone affected thermal and mechanical properties of the crystallized PLA.
机译：在各种有机溶剂（例如丙酮，乙酸乙酯，二乙醚，四氢呋喃，甲醇，己烷，甲苯，二甲苯和邻二氯苯）中研究了非晶态聚乳酸（PLA）的结晶。除己烷外，大多数溶剂都会引起无定形PLA的结晶。在使用的溶剂中，丙酮是最有效的加速结晶的溶剂。丙酮渗透到PLA的非晶相中诱导结晶，并且渗透遵循Fick型扩散。结晶速率随导电温度的升高而增加。结晶的PLA形成α晶体结构。随着时间的流逝，结晶的PLA中渗透的丙酮逐渐蒸发，丙酮的消除影响结晶的PLA的热和机械性能。

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