Influence of urea on crystallization of polycaprolactone
Wang Wanwan, Chen Hongxiang, Dai Qiaoli Zhao Dan, Wang Lijuan, Zhou Yu, Zeng Danlin
Hubei Province Key Laboratory of Coal Conversion and New Carbon Materials,School of Chemistry and Chemical Engineering,Wuhan University of Science and Technology,Wuhan 430081
Abstract: PCL/urea complex was prepared by adding small molecular urea to improve the crystallinity of PCL.The melting range,crystallinity,crystal morphology and crystallization process of complex were studied by micro-melting point,X-ray diffraction (XRD),differential scanning calorimetry (DSC) and polarizing microscopy (POM).The structure of complexe was studied by fourier transform infrared spectroscopy (FT-IR).The results showed that the crystal morphology of PCL and its complex were spherulite,and the density of spherulite in complex was higher than pure PCL.The size of spherulite became smaller with the increase of urea content.The crystallinity of complex was slightly lower than pure PCL.The adding of urea narrowed the melting range of PCL.This was due to the hydrogen bonding between urea and PCL,and urea played a role in the nucleating agent.
王婉婉, 陈红祥, 代巧丽, 赵丹, 王丽娟, 周瑜, 曾丹林. 尿素对聚己内酯二醇结晶性能的影响研究[J]. 化工新型材料, 2018, 46(11): 173-176.
Wang Wanwan, Chen Hongxiang, Dai Qiaoli Zhao Dan, Wang Lijuan, Zhou Yu, Zeng Danlin. Influence of urea on crystallization of polycaprolactone. New Chemical Materials, 2018, 46(11): 173-176.
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