Structure-property relationships in polyethylene blends: the effect of morphology on electrical breakdown strength
Structure-property relationships in polyethylene blends: the effect of morphology on electrical breakdown strength
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DOI：
10.1023/a:1018617200285
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发表时间：
1997-09-01
影响因子：
4.5
通讯作者：
Swingler, SG
中科院分区：
文献类型：
--
作者：
Hosier, IL;Vaughan, AS;Swingler, SG
制备线性和支化聚乙烯的共混物，覆盖1-20%线性聚乙烯的组成范围，随后选择三种热处理以产生一系列不同的形态。在124 ° C下的等温结晶在支化聚乙烯的基质内产生致密的线性夹杂物，在115 ° C下的等温结晶产生开放的带状球晶形态，并且最后，淬火导致连续的球晶织构。然后采用斜坡测试来研究形态对电强度的影响。结果发现，共混物的电强度主要取决于形态，并且通过优化热处理和线性聚乙烯含量，可以获得性能的大幅改善。
Blends of linear and branched polyethylene were prepared covering the composition range 1-20% linear polyethylene, and three thermal treatments were subsequently chosen to produce a range of different morphologies. Isothermal crystallization at 124 degrees C gives rise to compact linear inclusions within a matrix of branched polyethylene, isothermal crystallization at 115 degrees C produces an open, banded spherulitic morphology and, finally, quenching leads to a continuous spherulitic texture. Ramp testing was then employed to investigate the effect of morphology on electrical strength. It was found that the electrical strength of the blend depends primarily on the morphology and that, by optimizing thermal treatment and linear polyethylene content, substantial improvements in properties can be obtained.