The Effect of Annealing on the Structure and Electric Performance of Polypropylene Films

IF 3.4 4区 化学 Q2 POLYMER SCIENCE International Journal of Polymer Science Pub Date : 2022-11-08 DOI:10.1155/2022/5970484
Xiying Dai, Z. Xing, Wei Yang, Chong Zhang, Fei Li, Xin Chen, Chen Li, Jianjun Zhou, Lin Li
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引用次数: 2

Abstract

Biaxially oriented polypropylene (BOPP) and uniaxially oriented polypropylene (UOPP) films were annealed. The effect of annealing temperature (Ta) on dielectric strength was studied. The electric breakdown strength (Eb) of BOPP and UOPP films changes in a quite different trend with the annealing process. Eb of BOPP films decreases with the increase in Ta, whereas Eb of UOPP films increases first and then decreases with Ta. The structural changes during annealing were investigated. The crystallinity rises with Ta, while the orientation degree and Eb show a similar trend with Ta. Although the crystallinity and crystal structure can affect Eb of polypropylene films, the orientation of chain segments has a much larger correlation with Eb. Our results indicate that the deterioration of the metallized BOPP film capacitor may originate from the orientation degree decrease of chain segments after experiencing high temperature.
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退火对聚丙烯薄膜结构和电学性能的影响
对双轴取向聚丙烯(BOPP)和单轴取向聚丙烯(UOPP)薄膜进行了退火处理。研究了退火温度对介电强度的影响。BOPP和UOPP薄膜的电击穿强度(Eb)随退火过程的变化趋势完全不同。BOPP薄膜的Eb随Ta的增加而减小,而UOPP薄膜的Eb随Ta先增大后减小。研究了退火过程中的结构变化。结晶度随Ta的升高而升高,取向度和Eb值也随Ta的升高而升高。虽然结晶度和晶体结构会影响聚丙烯薄膜的Eb,但链段的取向与Eb的相关性要大得多。结果表明,金属化BOPP薄膜电容器的劣化可能源于高温后链段取向度的降低。
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来源期刊
CiteScore
6.10
自引率
0.00%
发文量
55
审稿时长
>12 weeks
期刊介绍: The International Journal of Polymer Science is a peer-reviewed, Open Access journal that publishes original research articles as well as review articles on the chemistry and physics of macromolecules.
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