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论文类型：期刊论文

发表时间：2017-12-01

发表刊物：POLYMER TESTING

收录刊物：Scopus、SCIE、EI

卷号：64

页面范围：12-19

ISSN号：0142-9418

关键字：Poly(lactic acid); Crystallization; Nucleating agent; FTIR; X-ray diffraction

摘要：The effect of a self-assembly nucleating agent, N,N',N"-tricyclohexy1-1,3,5-benzenetricarboxylamide (BTCA), on the crystallization behavior of poly(lactic acid) (PLA) was probed by time-resolved Fourier transform infrared spectroscopy (FTIR) and wide angle X-ray diffraction (WAXD). The vibrational changes associated with inter and intra-chain interactions during crystallization were monitored. In the initial period of crystallization, the order of intensity changes is as follows: 1458 cm(-1) > 1210 cm(-1) 921 cm(-1), 1458 cm(-1) similar to 1210 cm(-1) > 921 cm(-1), and 1458 cm(-1) similar to 1210 cm(-1) similar to 921 cm(-1) for neat PLA, PLAs containing 0.1 wt% and 0.3 wt% BTCA, respectively. This indicates that BTCA can accelerate both the formation of skeletal conformational-ordered structure and, especially, the 10(3) helix one. The incorporation of BTCA changes the crystallization mechanism but has no impact on the crystal form of PLA.