摘要
为提高PVDF的介电性能,文章研究拉伸温度和拉伸倍率等工艺参数对PVDF膜晶体结构和介电性能的影响。试验结果表明:单向拉伸能够提高PVDF的结晶度且最高达到80%;热拉伸时PVDF薄膜表面出现沿拉伸方向的伸长球晶及微条纹;当拉伸温度为80℃、拉伸倍率为4时,拉伸后的PVDF膜的介电常数增加40%,100 Hz时达到11.4,且此时介电损耗低至0.02。
In order to improve the dielectric performance of poly(vinylidene fluoride) (PVDF) film, the influence of uniaxial stretching on the crystal structure and the dielectric property of PVDF is investigated. The effects of stretching ratios and temperature on the relative degree of crystallinity and dielectric properties of PVDF films are investigated. The degree of crystallinity in PVDF film increases greatly and reaches up to 80% after uniaxial tensile. Meanwhile, the stretched spherulites and micro-strips paralleling with the stretching direction are observed in the matrix by AFM. When the stretching temperature is 80℃ and the stretching ratio is 4, the dielectric constant of the stretched film increases by 40% and reaches up to 11.4 at 100 Hz, with the dielectric loss being as low as 0.02.
出处
《航天器环境工程》
2016年第3期321-326,共6页
Spacecraft Environment Engineering
基金
可靠性与环境工程技术重点实验室开放基金项目(编号:KHZS20143007)
关键词
PVDF薄膜
单向拉伸
结晶度
介电常数
介电损耗
PVDF film
uniaxial stretching
degree of crystallinity
dielectric constant
dielectric loss
