材料科学
结晶
结晶度
压电
六氟丙烯
聚合物结晶
双层
铸造
复合材料
化学工程
氟化物
过程(计算)
相(物质)
聚合物
膜
有机化学
四氟乙烯
化学
计算机科学
工程类
操作系统
无机化学
生物化学
共聚物
作者
Bin Hu,Ning Hu,Liangke Wu,Feng Liu,Yaolu Liu,Huiming Ning,Satoshi Atobe,Hisao Fukunaga
出处
期刊:Journal of Polymer Engineering
[De Gruyter]
日期:2014-12-20
卷期号:35 (5): 451-461
被引量:4
标识
DOI:10.1515/polyeng-2014-0239
摘要
Abstract The effects of some important factors in the initial crystallization process of the solution casting method on the piezoelectricity of poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) films were extensively explored. The experimental results revealed that there is an optimal initial crystallization temperature at around 90°C. The slow cooling speed can moderately enhance the degree of crystallinity. The most important finding was that a bilayer crystalline structure caused by an asymmetrical heating pattern can enhance the formation of packed micro-fibrillar morphologies after drawing. These three points can increase the piezoelectricity of the PVDF-HFP films, indicating the increase of the extended-chain crystals ( β -phase).
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