中国塑料 ›› 2023, Vol. 37 ›› Issue (12): 29-34.DOI: 10.19491/j.issn.1001-9278.2023.12.005

• 材料与性能 • 上一篇    下一篇

影响BOPP电容膜击穿场强的微观结构及与制备工艺的关系探究

戴熙瀛1, 张翀1, 万彩霞2,3(), 杨威1, 邢照亮1   

  1. 1.北京智慧能源研究院,北京 102209
    2.中国科学技术大学,国家同步辐射实验室,合肥 230029
    3.中国科学技术大学先进技术研究院,合肥 230094
  • 收稿日期:2023-06-17 出版日期:2023-12-26 发布日期:2023-12-26
  • 通讯作者: 万彩霞,博士后,研究领域:高分子物理加工,cxwan113@ustc.edu.cn
    E-mail:cxwan113@ustc.edu.cn
  • 基金资助:
    大会征集承办单位、协办单位、支持单位:

Microstructure of BOPP capacitor film affecting breakdown field strength and its relationship with preparation process

DAI Xiying1, ZHANG Chong1, WAN Caixia2,3(), YANG Wei1, XING Zhaoliang1   

  1. 1.Beijing Institute of Smart Energy,Beijing 102209,China
    2.National Synchrotron Radiation Laboratory,University of Science and Technology of China,Hefei 230026,China
    3.Institute of Advanced Technology,University of Science and Technology of China,Hefei 230094,China
  • Received:2023-06-17 Online:2023-12-26 Published:2023-12-26
  • Contact: WAN Caixia E-mail:cxwan113@ustc.edu.cn

摘要:

侧重研究了双向拉伸聚丙烯(BOPP)电容膜加工工艺对击穿场强的影响关系,及其背后影响击穿场强的微观结构因素。结果表明,影响击穿场强的微观结构包括结晶度、无定形区分子链运动能力及粗糙度,结晶度越高、无定形区分子链运动能力越受限、粗糙度越小,击穿场强越高;在加工过程中,可以通过适当降低纵向拉伸温度来降低无定形区分子链运动能力和粗糙度,此外,可以通过提高横向拉伸温度来提高结晶度,从而实现提高击穿场强的目的;BOPP电容膜加工⁃结构⁃性能之间关系的建立为产线改善产品击穿场强提供了基础依据。

关键词: 双向拉伸聚丙烯, 电容膜, 击穿场强, 结晶度, 无定形区

Abstract:

This article focused on the relationship between the processing parameters of biaxially oriented polypropylene (BOPP) capacitor films and breakdown field strength, as well as the microstructure affecting breakdown field strength. The results indicated that the microstructure affecting breakdown field strength included the crystallinity, mobility of molecular chains in the amorphous region, and roughness of BOPP capacitor films. The higher crystallinity, the more serious was the mobility of molecular chains in the amorphous region limited, the smaller was the roughness, and the higher was the breakdown field strength. During the processing, the molecular chain motion ability in the amorphous region and roughness could be reduced through appropriately reducing the longitudinal stretching temperature. In addition, the crystallinity of BOPP capacitor films increased with an increase in the transverse stretching temperature, thus reaching the goal of improving the breakdown field strength. The establishment of the relationship between the processing, structure and performance of BOPP capacitive films provides a fundamental basis for improving their breakdown field strength in production lines.

Key words: biaxially oriented polypropylene, capacitor film, breakdown field strength, crystallinity, amorphous region

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