Abstract
A study has been made concerning the static electrification of such linear flexible-chain polymers as polybutadiene, polyisoprene, and fluorine rubber with wide and narrow molecular-weight distributions at T > Tg. It has been found that static electrification occurs as a result of a relaxation transition of polymers from the fluid to high-elastic state, accompanied by breakdown of the specimens and their detachment from the walls confining the flow, which leads to slippage of the polymers. This phenomenon is explained in terms of the activation theory of polymer friction. The dependence of static electrification on temperature, molecular weight, and molecular-weight distribution is determined by the effect of these parameters on the relaxation characteristics of a polymer, and, more particularly, its segmental mobility.
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