热老化对聚丙烯电缆绝缘料聚集态结构的影响

张凯, 刘爱民, 段玉兵, 高嫄, 穆明亮, 颜森, 聂兴成, 吴春海

PDF(2196 KB)
PDF(2196 KB)
塑料科技 ›› 2024, Vol. 52 ›› Issue (10) : 55-60. DOI: 10.15925/j.cnki.issn1005-3360.2024.10.010
理论与研究

热老化对聚丙烯电缆绝缘料聚集态结构的影响

作者信息 +

Effect of Thermal Aging on Aggregated State Structure of Polypropylene Cable Insulating Material

Author information +
History +

摘要

为了研究热老化对聚丙烯聚集态结构的影响,采用熔融共混和接枝改性方式分别制备了两种聚丙烯绝缘料,对各试样进行了加速热老化试验,并通过X射线衍射、差示扫描量热法、偏光显微镜对热老化前后试样的聚集态结构进行表征。结果表明:老化前的共混型聚丙烯仅存在α晶体,热老化可使其诱导产生β晶体,而接枝型聚丙烯老化前后均为α晶体和β晶体共存,但老化后β晶体含量出现明显下降。两种聚丙烯的结晶速率均较交联聚乙烯(XLPE)高。其中,接枝型聚丙烯具有明显的异相成核作用,其晶体更加完善且晶体尺寸分布均匀,结晶度高达40.17%。同时,在热老化过程中,接枝型聚丙烯试样表现出较优的抗热氧老化能力,受损程度明显低于共混型聚丙烯试样。

Abstract

In order to investigate the effect of thermal aging on the aggregation structure of polypropylene, two kinds of polypropylene insulating materials were prepared by melt blending and grafting modifications, and accelerated thermal aging tests were carried out on each specimen. The structures of the aggregated states before and after thermal aging were characterized by X-ray diffraction, differential scanning calorimetry, and polarizing optical microscopy. The results show that only α-crystals exist in the blended polypropylene before aging, and thermal aging can induce the production of β-crystals, while the αcrystals and β crystals coexist in the grafted polypropylene before and after aging, but β crystal content decreases significantly after aging. The crystallization rate of the two polypropylene is significantly higher than that of cross-linked polyethyline (XLPE), in which the grafted polypropylene has obvious heterophase nucleation, its crystal is more perfect and the crystal size distribution is uniform, and the crystallinity is as high as 40.17%. At the same time, grafted polypropylene specimens show better resistance to thermal oxygen aging, and the damage degree of grafted polypropylene specimens is significantly lower than that of blended polypropylene specimens.

关键词

聚丙烯 / 共混改性 / 接枝改性 / 聚集态结构

Key words

Polypropylene / Blending modification / Graft modification / Aggregate state structure

中图分类号

TM247 / TQ325.14

引用本文

导出引用
张凯 , 刘爱民 , 段玉兵 , . 热老化对聚丙烯电缆绝缘料聚集态结构的影响. 塑料科技. 2024, 52(10): 55-60 https://doi.org/10.15925/j.cnki.issn1005-3360.2024.10.010
ZHANG Kai, LIU Ai-min, DUAN Yu-bing, et al. Effect of Thermal Aging on Aggregated State Structure of Polypropylene Cable Insulating Material[J]. Plastics Science and Technology. 2024, 52(10): 55-60 https://doi.org/10.15925/j.cnki.issn1005-3360.2024.10.010

参考文献

1
欧阳本红,赵鹏,黄凯文,等.热塑性聚丙烯电缆料研究进展评述[J].高电压技术,2023,49(3):907-919.
2
杜伯学,李忠磊,周硕凡,等.聚丙烯高压直流电缆绝缘研究进展与展望[J].电气工程学报,2021,16(2):2-11.
3
蒋毅恺,徐曼,王若霏,等.电缆绝缘用聚丙烯/弹性体复合材料的高温介电性能[J].电工技术学报,2024,39(1):99-109.
4
何金良,彭琳,周垚.环保型高压直流电缆绝缘材料研究进展[J].高电压技术,2017,43(2):337-343.
5
HOSIER I L, VAUGHAN A S, SWINGLER S G. An investigation of the potential of polypropylene and its blends for use in recyclable high voltage cable insulation systems[J]. Journal of Materials Science, 2011, 46(11): 4058-4070.
6
陈鸿,赵健康,黄凯文,等.不同改性聚丙烯电缆绝缘料的结构与性能对比分析[J].电力工程技术,2022,41(5):233-239.
7
赵鹏,欧阳本红,黄凯文,等.不同改性聚丙烯电缆绝缘料热氧老化特性和选型[J].高电压技术,2022,48(7):2642-2649.
8
樊林禛,李琦,袁浩,等.接枝对聚丙烯绝缘材料热氧老化的影响及机理[J].中国电机工程学报,2022,42(11):4227-4238.
9
郝兴天,刘瑞,胡礼珍,等.聚丙烯种类对丁基橡胶/聚丙烯热塑性硫化胶性能的影响[J].橡胶工业,2024,71(7):513-517.
10
罗兵,孟繁博,王婷婷,等.脱气处理对高压直流电缆绝缘特性的影响[J].电工技术学报,2021,36():730-735.
增刊2
11
杨凯,任颙若,李建英,等.乙烯共聚调控晶态结构对聚丙烯电缆绝缘料电气性能的影响[J].高电压技术,2023,49(3):982-989.
12
王彦峰,闫国兵,谢榕昌,等.电热联合老化对XLPE电缆绝缘特性的影响[J].电力工程技术,2021,40(5):128-135.
13
程舒雅,张凯,徐国敏,等.氧化锌/邻苯二甲酸酐原位诱导等规聚丙烯β晶的尺寸效应[J].塑料,2022,51(2):34-38, 75.
14
李康乐,周凯,张桥峰,等.水树生长早期的XLPE晶区破坏现象及机制[J].中国电机工程学报,2021,41(24):8631-8643.
15
莫志深,张宏放,张吉东.晶态聚合物结构和X射线衍射[M].北京:科学出版社,2010.
16
殷志宝,张得栋,马金欣,等.热成型透明聚丙烯T5015产品可控流变性能研究[J].塑料科技,2023,51(10):53-56.
17
董芸滋,高嫄,李秀峰,等.交联度对交联聚乙烯/有机化蒙脱土纳米复合材料拉伸性能和介电性能的影响[J].电工技术学报,2023,38(5):1154-1165.
18
谢大荣,巫松桢.电工高分子物理[M].西安:西安交通大学出版社,1990.
19
刘宏博,程璐,徐哲,等.热老化对电容器用聚丙烯薄膜结构及电学性能的影响[J].绝缘材料,2023,56(2):96-103.
20
KAHOULI A, GALLOT-LAVALLÉE O, 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]. Journal of Applied Polymer Science, 2015, DOI: 10.1002/app.42602.
21
欧阳本红,黄凯文,赵鹏,等.中压聚丙烯和交联聚乙烯绝缘材料的结构与性能对比[J].绝缘材料,2022,55(3):32-37.
22
LI X F, YANG Y M, WANG Q, et al. Study on the water‐tree ageing characteristics of polyethylene/organic montmorillonite and crosslinked polyethylene/organic montmorillonite nanocomposites[J]. High Voltage, 2023, 8: 262-273.
23
刘鹏,何爽,张振康,等.聚烯烃弹性体的熔体流动速率和含量对聚丙烯树脂改性的影响[J].高分子材料科学与工程,2023,39(10):68-79.
24
许庆重,李秀峰,孙光华,等.热老化对XLPE/OMMT纳米复合材料微观结构和力学性能的影响[J].绝缘材料,2022,55(10):25-32.
25
任伊锦,张军,明智,等.α成核剂改性聚丙烯等温结晶动力学及晶体形态研究[J].塑料科技,2018,46(2):30-35.
26
詹威鹏,褚学来,申作家,等.加速热氧老化中交联聚乙烯电缆绝缘聚集态结构与介电强度关联性研究[J].中国电机工程学报,2016,36(17):4770-4778.
27
赵洪,袁鑫,杨佳明,等.弹性体/聚丙烯与塑性体/聚丙烯复合材料的力学及介电性能[J].高分子材料科学与工程,2020,36(10):44-50.
28
MENG F Y, ZHANG Q Y, WANG G Z, et al. Preparation and characterization of grafting styrene onto LLDPE by cyclohexane compatibilization in suspension polymerization[J]. Journal of Applied Polymer Science, 2015, DOI: 10.1002/app.41671.
29
CAO J, WEN N, ZHENG Y Y. Effect of long chain branching on the rheological behavior, crystallization and mechanical properties of polypropylene random copolymer[J]. Chinese Journal of Polymer Science, 2016, 34(9): 1158-1171.
30
张成,李洪飞,杨延滨,等.交联聚乙烯电缆老化、诊断及修复研究进展[J].绝缘材料,2020,53(7):1-11.

基金

国网山东省电力公司科技项目(520615230003)

评论

PDF(2196 KB)

Accesses

Citation

Detail

段落导航
相关文章

/