加工温度对双向拉伸聚丙烯电容膜晶体结构和击穿强度的影响

王锦清; 郭汉乡; 杜建强; 张琴; 王柯

doi:10.14028/j.cnki.1003-3726.2024.24.243

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加工温度对双向拉伸聚丙烯电容膜晶体结构和击穿强度的影响

高分子功能薄膜专题 | 更新时间：2025-03-28

- 加工温度对双向拉伸聚丙烯电容膜晶体结构和击穿强度的影响
- Effect of Processing Temperature on the Crystal Structure and Breakdown Strength of Biaxially Oriented Polypropylene Capacitor Films
- 高分子通报 2025年38卷第4期页码：622-631
- 作者机构：
  
  1.泉州嘉德利电子材料股份公司，泉州 362122
  2.四川大学高分子科学与工程学院，成都 610065
- 作者简介：
  
  *王柯，E-mail: wkestar@scu.edu.cn
- 基金信息：
  
  四川大学与泉州嘉德利校企联合研发项目(23H1284)
- DOI：10.14028/j.cnki.1003-3726.2024.24.243
  中图分类号：
- 收稿日期：2024-08-26，
  
  录用日期：2024-09-22，
  
  网络出版日期：2024-11-08，
  
  纸质出版日期：2025-04-20
- 稿件说明：
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王锦清, 郭汉乡, 杜建强, 张琴, 王柯. 加工温度对双向拉伸聚丙烯电容膜晶体结构和击穿强度的影响. 高分子通报, 2025, 38(4), 622–631.

Wang, J. Q.; Guo, H. X.; Du, J. Q.; Zhang, Q.; Wang, K. Effect of processing temperature on the crystal structure and breakdown strength of biaxially oriented polypropylene capacitor films. Polym. Bull. (in Chinese), 2025, 38(4), 622–631.
王锦清, 郭汉乡, 杜建强, 张琴, 王柯. 加工温度对双向拉伸聚丙烯电容膜晶体结构和击穿强度的影响. 高分子通报, 2025, 38(4), 622–631. DOI： 10.14028/j.cnki.1003-3726.2024.24.243.

Wang, J. Q.; Guo, H. X.; Du, J. Q.; Zhang, Q.; Wang, K. Effect of processing temperature on the crystal structure and breakdown strength of biaxially oriented polypropylene capacitor films. Polym. Bull. (in Chinese), 2025, 38(4), 622–631. DOI： 10.14028/j.cnki.1003-3726.2024.24.243.

摘要

基于同步双拉工艺，采用工业级高速率，分别研究了拉伸温度、热定型温度两大温度因素与双向拉伸聚丙烯(BOPP)电容膜晶体结构和击穿强度之间的关联性。研究发现，双向拉伸过程发生了应变诱导结晶，薄膜的片晶厚度、结晶度和长周期均高于铸片。拉伸温度的提高促进了重结晶，但接近初始熔融温度(

onset

)的拉伸因初始晶体的过度熔融而产生了不完善的薄片晶，导致结晶度降低。厚、薄片晶共同存在于高温拉伸薄膜中，二者的区别源于各自结晶前驱体的不同。对于热定型，温度的提高有利于链扩散，从而促进重结晶形成更完善的厚片晶。击穿强度(

)的威布尔分布结果表明，薄片晶的存在会劣化BOPP薄膜的

，接近

onset

拉伸所制备薄膜的击穿强度较其他薄膜降低了6%，

参数下降了50%，

稳定性遭到破坏。而退火由于促进了晶体结构完善，有利于

提高(120 ℃下退火样品

=655 V/μm，未退火样品

=606 V/μm)。这些结果对加工温度参数与薄膜晶体结构之间关系提供了新认识，有望为基于加工温度调控薄膜微观结构而实现电气性能优化提供理论参考。

Abstract

In this study

based on the synchronous biaxial stretching process and using high-speed rates

the correlation between stretching temperature

heat-setting temperature

and the crystal structure and breakdown strength of biaxially oriented polypropylene (BOPP) films for capacitor was investigated. It was found that strain-induced crystallization occurred during the biaxial stretching process. Lamellae thickness

crystallinity

and long period are all higher than those of cast sheets. An increase in stretching temperature promoted recrystallization

but stretching close to the onset melting temperature (

onset

) resulted in imperfect thin lamellae due to excessive melting

leading to a decrease in crystallinity. Thick and thin lamellae coexisted in high-temperature stretched films

with the differences originating from their respective recrrystallization precursors. For heat-setting (annealing)

an incre

ase in temperature facilitated chain diffusion

thereby enhancing the recrystallization of more perfect thick lamellae. Weibull distribution analysis of breakdown strength (

) indicated that the presence of thin lamellae degraded the

with films prepared close to

onset

exhibiting a 6% and 50% reduction in

and paremeter

respectively

compared to those of other films. Annealing

by promoting the perfection of crystal structure

was found to enhance

(

=655 V/μm for annealed at 120 ℃

compared to

=606 V/μm for non-annealed samples). These results provide insights into the systematic understanding of the relationship between processing temperature and film crystal structure

laying the groundwork for optimizing the electrical properties of films by controlling the microstructure through processing temperature adjustment.

关键词

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references

刘强 , 邢照亮 , 周昌浩 , 宋赛楠 , 慕雪梅 , 王在花 , 王霞 , 姜涛 , 李健 . 电容器用BOPP薄膜及其专用树脂研究进展 . 绝缘材料 , 2023 , 56 ( 4 ), 1 – 6 .

汪鹏 , 姚成 , 刘刚 , 蔡希鹏 , 贾磊 , 王铠 , 陈龙 . 不同拉伸方式引起BOPP薄膜的结构特征与绝缘介电性能 . 中国塑料 , 2024 , 38 ( 3 ), 54 – 58 .

Xiong, J. ; Wang, X. ; Zhang, X. ; Xie, Y. C. ; Lu, J. Y. ; Zhang, Z. C . How the biaxially stretching mode influence dielectric and energy storage properties of polypropylene films . J. Appl. Polym. Sci. , 2021 , 138 ( 11 ), e50029 .

Zeng, S. X. ; Li, Q. ; Liu, H. X. ; Wang, J. Q. ; Wang, K . Structural characters of biaxially stretched polypropylene films and the relevant electrical insulating properties . J. Polym. Eng. , 2023 , 43 ( 6 ), 497 – 507 .

Xu, R. R. ; Du, B. X. ; Xiao, M. ; Li, J. ; Liu, H. L. ; Ran, Z. Y. ; Xing, J. W . Dielectric properties dependent on crystalline morphology of PP film for HVDC capacitors application . Polymer , 2021 , 213 , 123204 .

Wu, Y. ; Du, B. X. ; Li, Z. L. ; Wang, H. Y. ; Zheng, Z . Heterogeneous mesoscopic structure modulation enhancing dielectric strength of polypropylene insulation . Polymer , 2023 , 280 , 126072 .

Kahouli, A. ; Gallot-Lavallée, O. ; Rain, P. ; Lesaint, O. ; Guillermin, C. ; Lupin, J. M . Dielectric features of two grades of bi-oriented isotactic polypropylene . J. Appl. Polym. Sci. , 2015 , 132 ( 28 ), e42224 .

马宇威 , 程璐 , 刘宏博 , 徐哲 , 张卓 , 邢照亮 , 戴熙瀛 , 刘文凤 . 双向拉伸聚丙烯薄膜聚集态结构与击穿特性的关联 . 绝缘材料 , 2023 , 56 ( 1 ), 1 – 7 .

Sui, H. R. ; Wu, K. N. ; Zhao, G. ; Yang, K. ; Dong, J. Y. ; Li, J. Y . Greatly enhanced temperature stability of eco-friendly polypropylene for cable insulation by multifold long-chain branched structures . Chem. Eng. J. , 2024 , 485 , 149811 .

Wang, J. Q. ; Guo, H. X. ; Zeng, S. X. ; Du, J. Q. ; Zhang, Q. ; Wang, K . Thin, largescale processed, high-temperature resistant capacitor films based on polypropylene/cycloolefin copolymer blend . Chem. Eng. J. , 2024 , 492 , 152237 .

Gao, L. Y. ; Tu, D. M. ; Zhou, S. C. ; Zhang, Z. L . The influence of morphology on the electrical breakdown strength of polypropylene film . IEEE Trans. Electr. Insul. , 1990 , 25 ( 3 ), 535 – 540 .

Wang, Y. X. ; Wu, T. ; Fu, Q . Competition of shearing and cavitation effects on the deformation behavior of isotactic polypropylene during stretching . Polymer , 2023 , 273 , 125888 .

Wu, T. ; Wang, K. ; Xiang, M. ; Fu, Q . Progresses in manufacturing techniques of lithium-ion battery separators in China . Chin. J. Chem. , 2019 , 37 ( 12 ), 1207 – 1215 .

林浩 , 严飞 , 国江 , 黄想 , 姜胜宝 , 许梦伊 . 等规聚丙烯拉伸取向片晶结构的温度关联性 . 高分子通报 , 2024 , 37 ( 3 ), 358 – 367 .

Wang, Y. X. ; Chen, S. P. ; Wu, T. ; Fu, Q . Yielding behavior of isotactic polypropylene at elevated temperature understood at the spherulite level . Polymer , 2023 , 281 , 126150 .

Lu, Y. ; Chen, R. ; Zhao, J. Y. ; Jiang, Z. Y. ; Men, Y. F . Stretching temperature dependency of fibrillation process in isotactic polypropylene . J. Phys. Chem. B , 2017 , 121 ( 28 ), 6969 – 6978 .

Lin, Y. F. ; Li, X. Y. ; Meng, L. P. ; Chen, X. W. ; Lv, F. ; Zhang, Q. L. ; Zhang, R. ; Li, L. B . Structural evolution of hard-elastic isotactic polypropylene film during uniaxial tensile deformation: the effect of temperature . Macromolecules , 2018 , 51 ( 7 ), 2690 – 2705 .

Jiang, Z. Y. ; Tang, Y. J. ; Men, Y. F. ; Enderle, H. F. ; Lilge, D. ; Roth, S. V. ; Gehrke, R. ; Rieger, J . Structural evolution of tensile-deformed high-density polyethylene during annealing: scanning synchrotron small-angle X-ray scattering study . Macromolecules , 2007 , 40 ( 20 ), 7263 – 7269 .

Rastogi, S. ; Spoelstra, A. B. ; Goossens, J. G. P. ; Lemstra, P. J . Chain mobility in polymer systems: on the borderline between solid and melt. 1. Lamellar doubling during annealing of polyethylene . Macromolecules , 1997 , 30 ( 25 ), 7880 – 7889 .

Chen, X. D. ; Xu, R. J. ; Xie, J. Y. ; Lin, Y. F. ; Lei, C. H. ; Li, L. B . The study of room-temperature stretching of annealed polypropylene cast film with row-nucleated crystalline structure . Polymer , 2016 , 94 , 31 – 42 .

Dai, X. Y. ; Xing, Z. L. ; Yang, W. ; Zhang, C. ; Li, F. ; Chen, X. ; Li, C. ; Zhou, J. J. ; Li, L . The effect of annealing on the structure and electric performance of polypropylene films . Int. J. Polym. Sci. , 2022 , 2022 , 5970484 .

Rambo, R. P. ; Tainer, J. A . Accurate assessment of mass, models and resolution by small-angle scattering . Nature , 2013 , 496 ( 7446 ), 477 – 481 .

Ritamäki, M. ; Rytöluoto, I. ; Lahti, K. ; Vestberg, T. ; Pasanen, S. ; Flyktman, T . Large-area approach to evaluate DC electro-thermal ageing behavior of BOPP thin films for capacitor insulation systems . IEEE Trans. Dielectr. Electr. Insul. , 2017 , 24 ( 2 ), 826 – 836 .

Bao, R. Y. ; Ding, Z. T. ; Liu, Z. Y. ; Yang, W. ; Xie, B. H. ; Yang, M. B . Deformation-induced structure evolution of oriented β-polypropylene during uniaxial stretching . Polymer , 2013 , 54 ( 3 ), 1259 – 1268 .

Tamura, S. ; Ohta, K. ; Kanai, T . Study of crater structure formation on the surface of biaxially oriented polypropylene film . J. Appl. Polym. Sci. , 2012 , 124 ( 4 ), 2725 – 2735 .

Spieckermann, F. ; Polt, G. ; Wilhelm, H. ; Kerber, M. B. ; Schafler, E. ; Reinecker, M. ; Soprunyuk, V. ; Bernstorff, S. ; Zehetbauer, M . Dislocation movement induced by molecular relaxations in isotactic polypropylene . Macromolecules , 2017 , 50 ( 17 ), 6362 – 6368 .

Lin, Y. F. ; Li, X. Y. ; Meng, L. P. ; Chen, X. W. ; Lv, F. ; Zhang, Q. L. ; Li, L. B . Stress-induced microphase separation of interlamellar amorphous phase in hard-elastic isotactic polypropylene film . Polymer , 2018 , 148 , 79 – 92 .

Cui, K. P. ; Liu, D. ; Ji, Y. X. ; Huang, N. D. ; Ma, Z. ; Wang, Z. ; Lv, F. ; Yang, H. R. ; Li, L. B . Nonequilibrium nature of flow-induced nucleation in isotactic polypropylene . Macromolecules , 2015 , 48 ( 3 ), 694 – 699 .

Capt, L. ; Rettenberger, S. ; Münstedt, H. ; Kamal, M.R . Simultaneous biaxial stretching of polypropylene resins of varying tacticity part Ⅱ: film morphology and properties . Int. Polym. Proc. , 2005 , 20 ( 4 ), 369 – 379 .

Xu, S. S. ; Zhou, J. ; Pan, P. J . Strain-induced multiscale structural evolutions of crystallized polymers: From fundamental studies to recent progresses . Prog. Polym. Sci. , 2023 , 140 , 101676 .

Flory, P. J. ; Yoon, D. Y . Molecular morphology in semic-rystalline polymers . Nature , 1978 , 272 ( 5650 ), 226 – 229 .

Li, X.Y. ; Su, F.M. ; Ji, Y.X. ; Tian, N. ; Lu, J. ; Wang, Z. ; Qi, Z.M. ; Li, L. B . Influence of the memory effect of a mesomorphic isotactic polypropylene melt on crystallization behavior . Soft Matter , 2013 , 9 ( 35 ), 8579 – 8588 .

Nie, C. ; Peng, F. ; Xu, T. Y. ; Ding, Y. W. ; Sheng, J. F. ; Chen, W. ; Li, L. B . Biaxial stretch-induced cryst-allization of polymers: A molecular dynamics simulation study . Macromolecules , 2021 , 54 ( 21 ), 9794 – 9803 .

Wang, Z. ; Ma, Z. ; Li, L. B . Flow-induced crystallization of polymers: Molecular and thermodynamic considerations . Macromolecules , 2016 , 49 ( 5 ), 1505 – 1517 .

Zuo, F. ; Keum, J. K. ; Chen, X. M. ; Hsiao, B. S. ; Chen, H. Y. ; Lai, S. Y. ; Wevers, R. ; Li, J . The role of interlamellar chain entanglement in deformation-induced structure changes during uniaxial stretching of isotactic polypropylene . Polymer , 2007 , 48 ( 23 ), 6867 – 6880 .

Hu, W. G. ; Schmidt-Rohr, K . Polymer ultradrawability: The crucial role of α-relaxation chain mobility in the crystallites . Acta Polym. , 1999 , 50 ( 8 ), 271 – 285 .

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