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“Glass transition and disorder-to-order phase transition behavior of poly(l-lactic acid) revealed by infrared spectroscopy”

來源：張建明教授個人網站發布日期：2011-11-17

作者：11. Jianming Zhang*, Chenwei Li, Yongxin Duan, Domb, A. J, and Yukihiro Ozaki
關鍵字：infrared spectroscopy,Glass transition poly(l-lactic acid,
論文來源：期刊
具體來源：Vibrational Spectroscopy, 2010, 53, 307-310.
發表時間：2010年

A detailed analysis of the IR spectral changes of melt-quenched poly(l-lactic acid) (PLLA) sample is presented. It is found that the glass transition, cold crystallization, disorder-to-order and melting behavior of melt-quenched PLLA can be clearly revealed by choosing suitable characteristic bands and combing the 1st derivative manipulation. Of particular note, it is found that, there are chain segment relaxation for both the irregular conformation and the regular helical conformation in the process of glass transition. During the disorder-to-order phase transition, the content of 10/3 helix as indicated by the helical band at

921 cm⁻¹ increases slightly, which suggests that the structural rearrangement and recrystallization may take place at the same time. These results provide more information to understand the glass transition and disorder-to-order phase transition behavior of PLLA at molecular level.

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921 cm−1 increases slightly, which suggests that the structural rearrangement and recrystallization may take place at the same time. These results provide more information to understand the glass transition and disorder-to-order phase transition behavior of PLLA at molecular level.

921 cm⁻¹ increases slightly, which suggests that the structural rearrangement and recrystallization may take place at the same time. These results provide more information to understand the glass transition and disorder-to-order phase transition behavior of PLLA at molecular level.