Enhanced electrical insulating properties of polyethylene by incorporating polyethylene‐g‐polystyrene graft copolymers,Polymer International

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Enhanced electrical insulating properties of polyethylene by incorporating polyethylene‐g‐polystyrene graft copolymers
Polymer International ( IF 2.9 ) Pub Date : 2020-08-31 , DOI: 10.1002/pi.6114
Xiaopeng Sun _{1,

2} , Fanghong Yang _{1,

2} , Zhanhai Yao _{1,

2}

Affiliation

Aiming at utilizing the electron energy absorption characteristic of the benzene ring in polystyrene (PS) to enhance the electrical properties of insulation, here linear low density polyethylene grafted PS graft copolymers (LLDPE‐g‐PS) have been synthesized by pre‐irradiation and suspension grafting technology. Then, LLDPE‐g‐PS was added in LLDPE to prepare LLDPE/LLDPE‐g‐PS blends, of which the microstructure and thermal, rheological, electrical and mechanical properties were systematically investigated. Scanning electron microscopy showed that no interfacial debonding occurred in the blends. Rheological measurements showed that the viscoelastic properties of the blends were roughly the same as those of LLDPE. In terms of electrical properties, as LLDPE‐g‐PS was added, the injection of space charges was markedly suppressed. Meanwhile, all blends presented higher DC breakdown strength and the maximum was 1.45 times higher than that of LLDPE. Besides, blends exhibited little change in mechanical properties compared with LLDPE when PS contents were lower than 10 wt%. This investigation proposes an efficient method to improve the electrical properties of insulating materials. © 2020 Society of Industrial Chemistry

中文翻译：

通过掺入聚乙烯-g-聚苯乙烯接枝共聚物增强聚乙烯的电绝缘性能

为了利用聚苯乙烯（PS）中苯环的电子能量吸收特性来增强绝缘的电性能，这里通过预辐照和悬浮合成了线性低密度聚乙烯接枝的PS接枝共聚物（LLDPE- g - PS ）嫁接技术。然后，LLDPE-克-PS在LLDPE中加入以制备LLDPE / LLDPE-克-PS共混物，其中的微观结构和热，流变，电和机械性能进行了系统的研究。扫描电子显微镜显示在共混物中没有发生界面剥离。流变学测量表明，共混物的粘弹性与LLDPE大致相同。在电性能方面，如LLDPE-添加了g ‐PS，显着抑制了空间电荷的注入。同时，所有共混物均表现出更高的直流击穿强度，最大值是LLDPE的1.45倍。此外，当PS含量低于10 wt％时，与LLDPE相比，共混物的机械性能几乎没有变化。这项研究提出了一种有效的方法来改善绝缘材料的电性能。©2020工业化学学会

更新日期：2020-08-31

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