Studies on the improvement of breakdown strength of polyolefins
| Autor: | M. Hatada, Tohru Takahashi, H. Miyata, Niwa Toshio |
|---|---|
| Rok vydání: | 1993 |
| Předmět: |
Polypropylene
chemistry.chemical_classification Materials science Annealing (metallurgy) General Engineering Polymer Dielectric withstand test Polyethylene Crystallinity chemistry.chemical_compound chemistry High-density polyethylene Polymer blend Electrical and Electronic Engineering Composite material |
| Zdroj: | IEEE Transactions on Electrical Insulation. 28:30-34 |
| ISSN: | 0018-9367 |
| DOI: | 10.1109/14.192237 |
| Popis: | Breakdown tests were conducted on a variety of polyethylenes and polypropylenes. High density polyethylene (HDPE) and polypropylene random copolymers (PPR) exhibited the highest breakdown strengths among the examined polyolefins. Model cables insulated with HDPE and PPR were manufactured, and the impulse breakdown strength of the HDPE cables made under some specific manufacturing conditions was 1.6*larger than that of conventional crosslinked polyethylene (XLPE). However, improvements were not observed in the impulse breakdown strength of PPR. The AC breakdown strength of HDPE and PPR cables also did not improve. The reason for the improvement in impulse breakdown strength of HDPE is the increased crystallinity of the insulating material, is brought about by the heat annealing applied to the cable in a manufacturing process. > |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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