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Press molded plaque samples are commonly used for characterization of polymeric insulation materials. Such samples are prepared by pressing polymer granulates sandwiched between two layers of protective press films at high temperatures and pressures. Polyethylene terephthalate (PET) film is a common press film since it tolerates high temperatures, acts as a good diffusion barrier and can be separated...
A new material, which takes the place of polyethylene, is desired to be developed in order to raise a working voltage and decrease thickness of an insulator. There was a report that the breakdown strength of polyethylene was raised by immersing it into benzene for one year because of resonant energy absorption of the benzene ring [1]. By getting a hint from the report, new materials, copolymers of...
The range of conduction phenomena observed in polyethylene (PE) is quite variable. In ultraclean materials, in which ionic impurities and Poole-Frenkel enhanced ionization are less likely, the currently accepted view is that carriers are injected from the electrodes. Strong experimental evidence that the injected carriers are electrons when contacting polyethylene with a metal comes from the work...
Electrical and mechanical properties of commercial high-pressure polyethylene have been studied prior and after irradiation, with technological rather than purely scientific purposes. Most of the measurements were made on 0.1 cm thick samples, cut from a laminate of 0.57 crystallinity.
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