女人能不能接受一前一后,17c起草,美国历届总统一览表图

“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.

了解更多信息請進入張建明教授個人網站

私密直播全婐app免费大渔直播,国产av成人无码免费视频,男女同房做爰全过程高潮,国产精品自产拍在线观看

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.