苯乙烯聚合物中单体结构对空气中PD阻力的影响

Proceedings of IEEE Conference on Electrical Insulation and Dielectric Phenomena - (CEIDP '93) Pub Date : 1993-10-17 DOI:10.1109/CEIDP.1993.378929

A. Gustafsson, U. Gedde

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引用次数: 0

摘要

以苯乙烯聚合物为研究对象，研究了其化学结构对局部放电性能的影响。结果表明，单体结构对PD的稳定性有很大影响。这种行为可以用自由基容易形成来解释。给电子取代基通过稳定苯基型自由基增强了降解过程中自由基形成的驱动力。苯乙烯与对苯基苯乙烯和2-乙烯基萘(1-20 wt%)的共聚产生的聚合物比PS具有更高的PD稳定性。这表明芳香体系的大小是抗PD的积极因素，典型的电压稳定剂当它们与主链化学键合时也可能有效。

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The effect of monomer structure in styrene polymers on the resistance towards PD in air

Styrene polymers were used to study the influence of chemical structure on resistance to PD (partial discharges). It was found that the monomer structure has a great influence on the PD stability. The behavior can be explained by the ease with which radicals are formed. The driving force for the formation of radicals during the degradation is enhanced by electron-donating substituents by the stabilization of benzylic type radicals. Copolymerization of styrene with p-phenylstyrene and 2-vinylnaphthalene (1-20 wt%) produced polymers with higher PD-stability than PS. This demonstrates that the size of the aromatic system is a positive factor regarding PD resistance and that typical voltage stabilizers may also be effective when they are chemically bonded to the main chain.<>

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Proceedings of IEEE Conference on Electrical Insulation and Dielectric Phenomena - (CEIDP '93)

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