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Water treeing phenomena in amorphous dielectrics

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2 Author(s)
Shaw, S.H. ; Inst. of Mater. Sci., Connecticut Univ., Storrs, CT, USA ; Shaw, M.T.

Polystyrene was used to study the role of material variables in water-tree growth. Matrix stiffness, crosslink density, and additives were studied for their influence on the process of tree initiation and/or growth. It was found that amorphous, plasticized, and crosslinked polystyrene were all susceptible to water treeing. In crosslinked samples, water-tree growth was inhibited above a certain crosslink density. Lowering the stiffness of the polymer by plasticization markedly coarsened the water trees produced. Interfaces, while providing initiating sites in some instances, did slow the growth of impinging trees. The implications for water treeing in polyolefins are discussed

Published in:

Electrical Insulation, 1990., Conference Record of the 1990 IEEE International Symposium on

Date of Conference:

3-6 Jun 1990