In order to improve natures of polyethylene, they use to combine with halogen atoms or add halogenides to it. One of them is chlorinated polyethylene, which was reported to have better resistance against electrical tracking and discharge.
In this paper, surface chlorinated polyethylene films were made from a marketing low density polyethylene film by ultraviolet rays shinning in Cl
2 gas. Then, we studied detailed properties of the films and the oxidation weight increase grown by partial discharges.
The following results were obtained: The chlorination weight increase is larger than the value (about 12%wt) reported already. The chlorination and the cross linkage of polyethylene films grow at the same time. And then, the oxidation weight increase which comes from partial discharges, becomes smaller as the chlorination increases. And as the discharge time becomes longer, it increases because the sample surface is eroded by the discharge energy.
These results are known by measurments of dimension and weight, wearing tests, infrared absorption method, dynamic viscoelasticity tests, and so on.
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