Journal
POLYMER TESTING
Volume 32, Issue 6, Pages 1088-1093Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.polymertesting.2013.06.005
Keywords
Poly(lactic acid); Biodegradable polyesters; Crystallization; Nucleation; Phthalimide
Funding
- Major Project in Public Interest of Henan Province [HNZB [2011] N91]
- National Key Project for Basic Research of China [2012CB025903]
- National Natural Science Foundation of China [50873094]
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The effect of phthalimide compound on the nonisothermal and isothermal crystallization behavior of poly(lactic acid) (PLA) was investigated by differential scanning calorimetly (DSC) and polarized optical microscopy. It was found that the incorporation of a small amount of phthalimide promoted the crystallization of PLA significantly. The Avrami model was applied to analyze the isothermal crystallization kinetics. It was found that the Avrami exponent was higher for PLA/phthalimide blends than for neat PLA, indicating a heterogeneous nucleation mechanism. These results indicate that phthalimide may act as an efficient nucleating agent to improve the crystallization of PLA and expand its applications. (C) 2013 Elsevier Ltd. All rights reserved.
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