不同拉伸方式引起BOPP薄膜的结构特征与绝缘介电性能

doi:10.19491/j.issn.1001-9278.2024.03.010

中国塑料 ›› 2024, Vol. 38 ›› Issue (3): 54-58.DOI: 10.19491/j.issn.1001-9278.2024.03.010

不同拉伸方式引起BOPP薄膜的结构特征与绝缘介电性能

汪鹏¹(), 姚成², 刘刚², 蔡希鹏¹, 贾磊², 王铠¹, 陈龙¹

^1.深圳供电局有限公司，广东深圳 518001
^2.南方电网科学研究院有限责任公司，广州 510663

收稿日期:2023-08-17 出版日期:2024-03-26 发布日期:2024-03-28
作者简介:汪鹏（1985—），男，高级工程师，从事变电站设备检修、运维管理及电容器设备的研究，79893806@qq.com

Structural characteristics and electrical insulating properties of BOPP films based on different stretching modes

WANG Peng¹(), YAO Cheng², LIU Gang², CAI Xipeng¹, JIA Lei², WANG Kai¹, CHEN Long¹

^1.Shenzhen Power Supply Bureau Co，Ltd，Shenzhen 518001，China
^2.China Southern Power Grid Research Institute Co，Ltd，Guangzhou 510663，China

Received:2023-08-17 Online:2024-03-26 Published:2024-03-28

摘要/Abstract

摘要：

采用不同拉伸方式以及改变双向拉伸聚丙烯（BOPP）薄膜厚度，调节伸直链晶含量（厚晶片）、纤维化形貌和取向形态，并考察这些结构因素对介电性能的作用规律。结果表明，热稳定的伸直链晶和纤维网络的结构各向同性有利于提高击穿场强、降低介电损耗；对电介质薄膜加工⁃结构⁃性能关系的深入理解能够为设计、开发高品质电容膜产品提供参考。

关键词: 双向拉伸聚丙烯, 伸直链晶, 纤维化形貌, 击穿场强

Abstract:

In this work， simultaneous biaxial drawing and sequential biaxial drawing were chosen as two stretching modes to adjust the thickness， extended chain crystal content， fibrillar morphology， and orientation texture of BOPP films， and the working rules of these structural issues on their electrical insulating properties were investigated. The results indicated that a thick lamellar structure with a good thermal stability and an isotropous fibrillated network facilitated an improvement in the breakdown strength and a reduction in the dielectric loss. These results are advantageous to a good understanding on the processing⁃structure⁃property relation of polymer film dielectric.

Key words: biaxially stretched polypropylene, extended chain crystal, fibrillated network, breakdown strength

中图分类号:

TQ325.1⁺4

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[J]. 中国塑料, 2024, 38(3): 54-58.

WANG Peng, YAO Cheng, LIU Gang, CAI Xipeng, JIA Lei, WANG Kai, CHEN Long. Structural characteristics and electrical insulating properties of BOPP films based on different stretching modes[J]. China Plastics, 2024, 38(3): 54-58.

图/表 9

图1 3.4 μm厚度薄膜的DSC升温熔融曲线（a）、（b）； 4.5 μm厚度薄膜的DSC升温熔融曲线（c）、（d）；伸直链晶相对含量与膜厚度的关系（e）

Fig.1 DSC temperature rise melting curve of a 3.4 μm thick film（a） and （b）； DSC temperature rise melting curve of a 4.5 μm thick film（c） and （d）； relationship between the relative content of extended chain crystals and film thickness（e）

样品	X_c/% （DSC）	X_c/% （XRD）	T_m1/℃	T_m2/℃	T_m3/℃	T_m4/℃
同步_3.4 μm	50.4	58.0	160.8	168.5	170.9	172.2
异步_3.4 μm	50.6	58.6	158.8	166.6	168.9	170.1
同步_4.5 μm	47.0	56.8	160.1	166.7	170.0	171.7
异步_4.5 μm	47.7	54.8	157.3	166.7	168.8	170.6

表1 不同拉伸方式制备3.4 μm与4.5 μm厚度薄膜的结晶度与熔点

Tab.1 Crystallinity and melting point of 3.4 μm and 4.5 μm thick films prepared by different stretching methods

图2 不同拉伸方式制备3.4 μm与4.5 μm薄膜的XRD谱图

Fig.2 XRD diffraction spectra of 3.4 μm and 4.5 μm films prepared by different stretching methods

图3 不同拉伸方式制备BOPP薄膜的表面轮廓形貌

Fig.3 Surface profile morphology of BOPP films prepared by different stretching methods

图4 利用AFM观测不同拉伸方式制备薄膜的表面微观形貌

Fig.4 AFM observation of the surface microstructure of films prepared by different stretching methods

图5 不同拉伸方式和不同厚度薄膜的应力松弛行为

Fig.5 Stress relaxation behavior of different tensile modes and different thickness films

样品	松弛时间（τ）/s	初始应力（σ₀）/MPa	最终应力（σ）/MPa
同步_4.5 μm/MD	392.4	44.0	20.5
同步_4.5 μm/TD	241.5	102.8	29.7
异步_4.5 μm/MD	373.7	32.6	14.6
异步_4.5 μm/TD	240.8	125.2	36.0
同步_3.4 μm/MD	408.6	46.9	22.5
同步_3.4 μm/TD	260.4	92.1	29.1
异步_3.4 μm/MD	391.4	36.4	17.1
异步_3.4 μm/TD	253.1	146.8	44.9

表2 各种薄膜样品应力松弛行为的特征参数

Tab.2 Characteristic parameters of stress relaxation behavior of various films with different thickness

图6 不同拉伸方式制备3.4 μm厚度（a）和4.5 μm厚度（b）薄膜的击穿场强Weibull分布；同步拉伸薄膜的击穿场强（α因子）与厚晶片含量之间的关系（c）

Fig.6 The Weibull distribution of breakdown field strength of （a） 3.4 μm thick and （b） 4.5 μm thick films prepared by different stretching methods；（c） the relationship between the breakdown field strength （α factor） and the content of thick wafer for simultaneously stretched films

图7 各种BOPP薄膜介电常数及介电损耗的频率依赖性（a）、（b）与温度依赖性（c）、（d）

Fig.7 Frequency dependence of dielectric constant and dielectric loss of various BOPP films （a） and （b）； and temperature dependence of dielectric constant and dielectric loss of various BOPP films （c） and （d）

参考文献 15

1	Ritamaki M， Rytoluoto I， Lahti K. Performance metrics for a modern BOPP capacitor film［J］. IEEE Trans Dielectr Electr Insul， 2019， 26：1 229.
2	Chen Q， Shen Y， Zhang S H， Zhang Q M. Polymer⁃based dielectrics with high energy storage density［J］. Annu Rev Mater Res， 2015， 45：433.
3	Ritamaki M， Rytoluoto I， Lahti K. Large⁃area approach to evaluate DC electro⁃thermal ageing behavior of BOPP thin film for capacitor insulation systems［J］. IEEE Trans Dielectr Electr Insul， 2017， 24：826.
4	Huan T D， Boggs S， Teyssedre G， et al. Advanced polymeric dielectrics for high energy density applications［J］. Prog Mater Sci， 2016， 83：236.
5	Kahouli A， Lavallee O G， Rain P， et al. Structure effect of thin film polypropylene view by dielectric spectroscopy and X⁃ray diffraction： Application to dry type power capacitors［J］. J Appl Polym Sci，2015， 132：42602.
6	Ho J， Ramprasad R， Boggs S. Effect of alteration of antioxidant by UV treatment on the dielectric strength of BOPP capacitor film［J］. IEEE Trans Dielectr Electr Insul， 2007， 14：1 295.
7	Nitta K H， Sawada T， Yoshida S， et al. Three dimensional molecular orientation of isotactic polypropylene films under biaxial deformation at higher temperatures［J］. Polymer， 2015， 74：30.
8	Kahouli A， Lavallee O G， Rain P， et al. Dielectric features of two grades of bi⁃oriented isotactic polypropylene［J］. J Appl Polym Sci， 2015， 132： 42224.
9	Gao L Y， Tu D M， Zhou S C， et al. The influence of morphology on the electrical breakdown strength of polypropylene film［J］. IEEE Trans Dielectr Electr Insul， 1990， 25：535.
10	Rytöluotoa I， Gitsasb A， Pasanenc S， et al. Effect of film structure and morphology on the dielectric breakdown characteristics of cast and biaxially oriented polypropylene films［J］. Eur Polym J， 2017， 95：606.
11	Xiong J， Wang X， Zhang X， et al. How the biaxially stretching mode influence dielectric and energy storage properties of polypropylene films［J］. J Appl Polym Sci， 2021， 138： e50029.
12	Chen Q， Wang Z W， Zhang S M， et al. Structure evolution and deformation behavior of polyethylene film during biaxial stretching［J］. ACS Omega， 2020， 5： 655.
13	Tabatabaei S H， Carreau P J， Ajji A. Effect of processing on the crystalline orientation， morphology， and mechanical properties of polypropylene cast films and microporous membrane formation［J］. Polymer， 2009， 50： 4 228.
14	Capt L， Rettenbergen S， Munstedt H， et al. Simultaneous biaxial deformation behavior of isotactic polypropylene films［J］. Polym Eng Sci， 2003， 43：1 428.
15	Lupke T， Dunger S， Sanze J， et al. Sequential biaxial drawing of polypropylene films［J］. Polymer，2004， 45：6 861.

[1]	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[J]. , 2024, 38(3): 54-58.
[2]	戴熙瀛, 张翀, 万彩霞, 杨威, 邢照亮. 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[J]. 中国塑料, 2023, 37(12): 29-34.
[3]	赵素芬涂志刚张莉琼刘晓艳. 烟包BOPP爽滑母料的研究[J]. 中国塑料, 2012, 26(08): 94-96 .
[4]	涂志刚. 时效稳定型高收缩BOPP烟膜的研究 [J]. 中国塑料, 2008, 22(04): 66-69 .
[5]	尹汉成, 宋健, 石振民, 杨福金, 张敏. BOPP薄膜生产线蒸汽梯级利用的研究[J]. 中国塑料, 2007, 21(7): 83-87.

不同拉伸方式引起BOPP薄膜的结构特征与绝缘介电性能

Structural characteristics and electrical insulating properties of BOPP films based on different stretching modes

RichHTML

PDF

可视化

摘要/Abstract

引用本文

使用本文

图/表 9

参考文献 15

相关文章 5

编辑推荐

Metrics

本文评价