Effect of Triphenylphosphite on Crystallization Behavior of Poly(lactic acid)

doi:10.19491/j.issn.1001-9278.2015.08.007

China Plastics ›› 2015, Vol. 29 ›› Issue (8): 42-47 .DOI: 10.19491/j.issn.1001-9278.2015.08.007

Effect of Triphenylphosphite on Crystallization Behavior of Poly(lactic acid)

Received:2015-03-02 Revised:2015-05-08 Online:2015-08-26 Published:2015-08-26

Abstract

Abstract: In this paper, the effect of triphenylphosphite(TPP) on the crystal morphology and crystallization process of poly(lactic acid)(PLA) was investigated using polarizing microscopy(PLM) and differential scanning calorimetry (DSC). The crystallization kinetics was analyzed by the method of Mo. It showed that, firstly, the addition of TPP didn’t change the crystal morphology of PLA, and the crystal geometry of TPP-PLA was still spherical. Then, TPP decreased the cold-crystallization temperature(Tcc) of PLA from 115.4 to 102.8 ℃，and increased the crystalline degree from 30.2 % to 34.9 %. Mo’s F(T) values of TPP-PLA decreased obviously.

Key words: poly(lactic acid), triphenyl phosphite, cold crystallization, crystal morphology, crystallization kinetics

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Effect of Triphenylphosphite on Crystallization Behavior of Poly(lactic acid)

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