Polyvinyl chloride pressure, effect

The effectiveness of such cheap termination by oxygen is, of course, low. In high-pressure polyethylene, polyvinyl chloride, polytetrafluoroethylene, etc., a large amount of frozen radicals was detected by ESR [126]. Actually, even after oxygen addition to a radical, the resulting ROO is sufficiently unstable. Research in this direction could lead to an acceptably cheap and efficient deactivation. 

Polyvinyl chloride (PVC) is the most widely used thermoplastic piping system. PVC is stronger and more rigid than the other thermoplastic materials. When specifying PVC thermoplastic piping systems particular attention must be paid to the high coefficient of expansion-contraction for these materials in addition to effects of temperature extremes on pressure rating, viscoelasticity, tensile creep, ductility, and brittleness. 

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