Highly crystallized poly (lactic acid) under high pressure

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Abstract

Biodegradable poly (lactic acid) (PLA) usually has a crystallinity less than 10% due to its poor crystallization ability. In this work, we found high pressure could significantly facilitate formation of crystallites of PLA, resulting in a crystallinity high up to 66.3% at pressure and temperature of 300 MPa and 185 °C. High-pressure induced crystalline reorganization and lamellar thickening led to two melting temperatures in the highly crystallized PLA but without cold crystallization compared to the normal-pressure crystallized PLA. Temperature dependence of high-pressure crystallization of PLA suggested desirable crystallization temperatures for highly crystallized PLA products. © 2012 Author(s). This article is distributed under a Creative Commons Attribution 3.0 Unported License.

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Zhang, J., Yan, D. X., Xu, J. Z., Huang, H. D., Lei, J., & Li, Z. M. (2012). Highly crystallized poly (lactic acid) under high pressure. AIP Advances, 2(4). https://doi.org/10.1063/1.4769351

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