Effects of initial crystallization process on piezoelectricity of PVDF-HFP films

被引：5

作者：

Hu, Bin ^{[3
]}

Hu, Ning ^{[1
,2
]}

Wu, Liangke ^{[1
]}

Liu, Feng ^{[4
]}

Liu, Yaolu ^{[1
]}

Ning, Huiming ^{[1
]}

Atobe, Satoshi ^{[5
]}

Fukunaga, Hisao ^{[5
]}

机构：

[1] Chongqing Univ, Coll Aerosp Engn, Chongqing 400044, Peoples R China

[2] Chiba Univ, Dept Mech Engn, Inage Ku, Chiba 2638522, Japan

[3] Chongqing Univ Sci & Technol, Coll Met & Mat Engn, Chongqing 401331, Peoples R China

[4] Hunan Univ, Coll Mech & Vehicle Engn, Changsha 412008, Hunan, Peoples R China

[5] Tohoku Univ, Dept Aerosp Engn, Aoba Ku, Sendai, Miyagi 9808579, Japan

来源：

JOURNAL OF POLYMER ENGINEERING | 2015年 / 35卷 / 05期

基金：

中国国家自然科学基金;

关键词：

crystalline structure; initial crystallization process; piezoelectricity; PVDF-HFP; POLY(VINYLIDENE FLUORIDE); PHASE-TRANSFORMATION; ALPHA-PHASE; BETA-PHASE;

D O I：

10.1515/polyeng-2014-0239

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

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 degrees 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 (beta-phase).

引用

页码：451 / 461

页数：11

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