The Influence of Morphology on the Electric Strength of Polymer Insulation
- 1 October 1980
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Electrical Insulation
- Vol. EI-15 (5) , 382-388
- https://doi.org/10.1109/tei.1980.298330
Abstract
This paper describes the effect of morphological structure on the electric strength and some physico-chemical properties of polymers with flexible chains (HDPE, LDPE, PP) and polymers with rigid chains (CA). It is shown that a polymer body has a discrete structure consisting of elements of different densities. The most regular structure with high density is characteristic of spherulites. Their size may be modified by different methods: heat treatment, plasticization, addition of nucleating agent, modification of molecular weight, etc. The inter-spherulitic boundary regions are shown to determine the electrical properties of the specimen as a whole. As the spherulite size decreases, the density of the polymer within the boundary regions increases, improving the electric strength.Keywords
This publication has 4 references indexed in Scilit:
- The Morphology of Cross-Linked Polyethylene InsulationIEEE Transactions on Electrical Insulation, 1978
- Pseudo-Spherulite Structures in Cross-Linked Low-Density PolyethyleneIEEE Transactions on Electrical Insulation, 1978
- Crystallinity, Supermolecular Structure, and Thermodynamic Properties of Linear Polyethylene FractionsMacromolecules, 1977
- Microkinetics of lamellar crystallization in a long chain polymerProceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1971