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On the molecular microstructure dependence of space charge trapping in polymers

✍ Scribed by Guarrotxena, N.; Vella, N.; Toureille, A.; Millán, J.

Publisher
John Wiley and Sons
Year
1998
Tongue
English
Weight
287 KB
Volume
46
Category
Article
ISSN
0959-8103

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✦ Synopsis

The space charges trapped after applying a strong electrical Ðeld have been measured using the thermal step (TS) method for a series of poly(vinylchloride) (PVC) samples di †ering in their tacticity-induced molecular microstructure. This has been controlled chemically (stereospeciÐc substitution reactions) or physically (stretching of Ðlms at temperatures near From some T g

). of the results obtained, most of which are still to be published, the space charge quantity and distribution are inferred to depend strongly on the content of the isotactic tetrad mmr and on the two conformations, whether GTTG~TT or GTGTTT, which are probably in it.

1998 SCI.

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