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首页> 外文期刊>Journal of Applied Polymer Science >The effect of inorganic and organic nucleating agents on the electrical breakdown strength of polyethylene
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The effect of inorganic and organic nucleating agents on the electrical breakdown strength of polyethylene

机译：无机和有机成核剂对聚乙烯电击穿强度的影响

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摘要

Altering the morphology of polyethylene affects physical and electrical properties with reduced spherulite size correlating with higher electrical breakdown strength. Nucleating agents in polyethylene influence the final crystal morphology by increasing the number of spherulites and reducing spherulite size. Few studies are available that relate the nucleating activity to improved electrical breakdown strength. Although nanosilica is known to improve electrical breakdown strength of polyethylene in addition to serving as a nucleating agent, previous studies have not fully addressed the relationship between the improved breakdown strength and nucleating activity. In this article, direct current electrical breakdown strength and nucleation effects on morphology are assessed on a single set of controlled polyethylene compositions containing two types of surface treated nanosilica particles. The results are compared to composites with two types of organic nucleating agents 1,3:2,4-bis(3,4-dimethylbenzylidene) sorbitol or calcium 1,2-cyclohexanedicarboxylate (CDA). CDA was the most effective organic nucleating agent and the hexamethyldisilizane treated nanosilica was the most effective inorganic nucleating agent in reducing spherulite sizes in low density polyethylene (LDPE). Reduced spherulite sizes in nucleated samples correlated with increased breakdown strength and lower conduction current compared to the neat LDPE. The LDPE sample with CDA also had the highest increase in crystallization temperature indicating stronger nucleating agent performance than the nanosilica and 1,3:2,4-bis(3,4-dimethylbenzylidene) sorbitol composite samples. The addition of these inorganic and organic nucleating agents all resulted in improvements in electrical breakdown strength. The results show that nucleation deserves more attention as a potential cause for improved breakdown strength observed with silica and organic nucleating agents. (c) 2018 Wiley Periodicals, Inc. J. Appl. Polym. S
机译：改变聚乙烯的形态会影响与较高电击穿强度相关的较低的球晶尺寸的物理和电性能。聚乙烯中的成核剂通过增加球晶的数量和减少球晶尺寸来影响最终晶体形态。有很少的研究可用，使成核活性改善电击穿强度提高。虽然已知纳米硅可提高聚乙烯的电击穿强度除了用作成核剂外，先前的研究没有完全解决改善的击穿强度和成核活性之间的关系。在本文中，在含有两种表面处理的纳米硅颗粒的一组受控的聚乙烯组合物上评估对形态的直接电流电击穿强度和成核效应。将结果与复合材料进行比较，具有两种类型的有机成核剂1,3：2,4-双（3,4-二甲基苄基）山梨糖醇或钙1,2-环己二羧酸甲酯（CDA）。 CDA是最有效的有机成核剂，并且六甲基二硅烷处理的纳米硅酸盐是最有效的无机成核剂，其在低密度聚乙烯（LDPE）中减少球晶尺寸。与整齐的LDPE相比，成核样品中的核心样品中的核心尺寸减少，与碎片相比，导通电流增加。具有CDA的LDPE样品也具有比纳米硅藻和1,3：2,4-双（3,4-二甲基苄基）山梨糖醇复合样品更高的结晶温度增加。添加这些无机和有机成核剂均导致电击穿强度的改善。结果表明，成核值得更加关注，因为潜在的原因是用二氧化硅和有机成核剂观察到改善击穿强度的潜在原因。 （c）2018 Wiley期刊，Inc.J.Phill。聚合物。 S.

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