中文

冷拉伸聚乳酸亚稳相凝聚态结构的光谱研究

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  • Key Words:聚乳酸;;亚稳相;;偏振红外;;相变

  • Abstract:高分子亚稳相,作为一种结构有序程度介于非晶态与晶态之间的相态,近年来由于其结构的特殊性及其在高分子相变过程中所扮演的角色引起了高分子物理领域研究者的广泛关注。而有关聚乳酸亚稳相是最近才被发现的,Zhang等和Stoclet人分别在熔融淬冷聚乳酸嵌段共聚物PLLA-PEG-PLLA中样品中和玻璃化转变温度附近拉伸聚乳酸非晶膜可以分别制得亚稳相结构,但对于冷拉伸聚乳酸亚稳相光谱分析还较为缺乏。在本文中,我们结合WAXD及偏振红外光谱对不同拉伸比的聚乳酸亚稳相进行分析,建立了聚乳酸半稳相微结构与其特征谱的对应关系,同时也依据变温偏振红外光谱的结果,对聚乳酸亚稳相至有序相变的机理进行了探讨。

  • Volume:VOL.32

  • Translation or Not:no


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