Electrospinning of Syndiotactic Polypropylene from a Polymer Solution at Ambient Temperatures
Electrospinning of Syndiotactic Polypropylene from a Polymer Solution at Ambient Temperatures
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DOI：
10.1021/ma9006472
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发表时间：
2009-07-28
期刊：
影响因子：
5.5
通讯作者：
Rabolt, John F.
中科院分区：
文献类型：
--
作者：
Lee, Keun-Hyung;Ohsawa, Osamu;Rabolt, John F.
采用多元溶剂体系，在室温下成功制备了间规聚丙烯(SPP)纤维膜。扫描电子显微镜表明，SPP的形态强烈依赖于环境，尤其是电纺过程中的环境温度。WAXD分析表明，电纺SPP纤维的晶体结构为I和III的混合体。假设在电纺过程中，由于快速的应力诱导结晶，在电纺SPP纤维中诱导出不太稳定的具有TRAMS-平面链的III型晶体。用FT-IR和拉曼光谱证实了陷阱平面构象的存在。然而，研究发现，在电纺SPP纤维中，I型是主要的晶体结构。
A syndiotactic polypropylene (sPP) fibrous membrane was successfully prepared from a multicomponent solvent system at room temperature. As demonstrated by SEM, the morphology of sPP was strongly dependent upon the environment, especially the ambient temperature during electrospinning. The crystal structure of electrospun sPP fibers exhibits a mixture of forms I and III, as determined by WAXD. It is hypothesized that the less stable form III crystals with trams-planar chains are induced in the electrospun sPP fibers due to rapid, stress-induced crystallization during the electrospinning process. To confirm the existence of a traps-planar conformation, FT-IR and Raman were employed. However, it was found that form I is the dominant crystal structure in electrospun sPP fibers.