Fabrication of Long-chain-branched Polypropylene/Cycloolefin Copolymer Blends for High Temperature Capacitor Film

Ju-yang Liu; Bo Wang; HIZBULLAH; Chong Zhang; Xin Chen; Zhao-liang Xing; Shao-wei Guo; Yao-tian Su; Feng-tao Chen; Jin-yong Dong

doi:10.11777/j.issn1000-3304.2025.25196

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Fabrication of Long-chain-branched Polypropylene/Cycloolefin Copolymer Blends for High Temperature Capacitor Film

Research Article | 更新时间：2026-02-01

- Fabrication of Long-chain-branched Polypropylene/Cycloolefin Copolymer Blends for High Temperature Capacitor Film
- Acta Polymerica Sinica Vol. 57, Issue 2, Pages: 442-459(2026)
- 作者机构：
  
  1.中国电力科学研究院有限公司先进输电技术国家重点实验室北京 100192
  2.中国科学院化学研究所中国科学院工程塑料重点实验室北京 100190
- 作者简介：
  
  Feng-tao Chen, E-mail: chenfengtao@iccas.ac.cn
- 基金信息：
- DOI：10.11777/j.issn1000-3304.2025.25196
  CLC：
- CSTR：32057.14.GFZXB.2025.7477
- Received：19 August 2025，
  
  Accepted：26 September 2025，
  
  Published Online：31 December 2025，
  
  Published：20 February 2026
- 稿件说明：
移动端阅览
刘炬阳, 王博, HIZBULLAH, 张翀, 陈新, 邢照亮, 郭少玮, 苏尧天, 陈风涛, 董金勇. 用于高温电容器薄膜的长链支化聚丙烯/环烯烃共聚物共混物的制备. 高分子学报, 2026, 57(2), 442-459.

Liu, J. Y.; Wang, B.; HIZBULLAH; Zhang, C; Chen, X; Xing, Z. L.; Guo, S. W.; Su, Y. T.; Chen, F. T.; Dong, J. Y. Fabrication of long-chain-branched polypropylene/cycloolefin copolymer blends for high temperature capacitor film. Acta Polymerica Sinica (in Chinese), 2026, 57(2), 442-459.
刘炬阳, 王博, HIZBULLAH, 张翀, 陈新, 邢照亮, 郭少玮, 苏尧天, 陈风涛, 董金勇. 用于高温电容器薄膜的长链支化聚丙烯/环烯烃共聚物共混物的制备. 高分子学报, 2026, 57(2), 442-459. DOI： 10.11777/j.issn1000-3304.2025.25196. CSTR： 32057.14.GFZXB.2025.7477.

Liu, J. Y.; Wang, B.; HIZBULLAH; Zhang, C; Chen, X; Xing, Z. L.; Guo, S. W.; Su, Y. T.; Chen, F. T.; Dong, J. Y. Fabrication of long-chain-branched polypropylene/cycloolefin copolymer blends for high temperature capacitor film. Acta Polymerica Sinica (in Chinese), 2026, 57(2), 442-459. DOI： 10.11777/j.issn1000-3304.2025.25196. CSTR： 32057.14.GFZXB.2025.7477.

摘要

设计并合成了一种长链支化聚丙烯(LCB-PP)/环烯烃共聚物(COC)的共混物，为开发耐高温聚丙烯电容膜提供了一种新方法. 首先使用优选的Ph

C(Cp)(Flu)ZrCl

/C(C

)

)(B(C

)

)茂金属催化剂体系，通过调控降冰片烯与乙烯的比例合成得到了具有高玻璃化转变温度的COC树脂. 随后，将所得COC分别与基于

-烯烃基甲基二氯硅烷共聚合-水解化学合成得到的LCB-PP以及商用双向拉伸聚丙烯(BOPP)按照一定比例进行熔融共混，制备得到了一系列linear-PP/COC和LCB-PP/COC共混物样品，并对其结构与性能进行了系统表征. 结果表明，PP/COC共混物具有更高的结晶温度和热变形温度，有利于其在高温环境下的应用. 同时，LCB结构作为成核位点能够促进成核，细化聚丙烯相的球晶尺寸，进而增大球晶密度. 此外，LCB结构对分子链缠结作用的提升能够限制分子链的运动，同时抑制熔融加工过程中COC颗粒的迁移聚集，促进其均匀分散，使PP/COC共混物的加工稳定性明显提升.

Abstract

A long-chain-branched polypropylene (LCB-PP)/cycloolefin copolymer (COC) blend was designed and synthesized

offering a novel approach for developing high-temperature-resistant polypropylene capacitor films. Initially

COC resins with high glass transition temperature were synthesized using a preferred Ph

C(Cp)(Flu)ZrCl

/C(C

)

)(B(C

)

) metallocene catalyst system by precisely adjusting the norbornene-to-ethylene ratio. Subsequently

the resulting COC was melt-blended in specific proportions with LCB-PP (synthesized

via

-alkenylmethyldichlorosilane copolymerization-hydrolysis (ACH) chemistry)

and commercial biaxially oriented polypropylene (BOPP)

respectively

thereby yielding a series of linear-PP/COC and LCB-PP/COC blend samples. The structure and properties of these blends were systematically characterized. The results demonstrated that the PP/COC blends exhibited elevated crystallization temperatures and enhanced heat deflection temperature

which are advantageous for their application in high-temperature environments. Meanwhile

the LCB structures

acting as nucleation sites

could promote heterogeneous nucleation

refined the spherulite size of the PP phase

and thereby increased the spherulite density. In addition

the enhancement of chain entanglement by the LCB structures effectively restricted the sliding of chains

concurrently suppressed the grain coarsening tendency of dispersed COC particles during melt processing

promoted their dispersion uniformity

and thereby significantly improved the processing stability of the PP/COC blends.

关键词

Keywords

references

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