A Novel Gas-Barrier Elastomer Composed of Butyl Rubber and Polyamide

摘要

Freon gas as chlorofluorocarbon or hydrofluorocarbon has geen used as a refrigerant in air-conditionaing systems.In particular,dichlorodifluoromethane (R12) and 1,11,2-tetrafluoroethane (R134a) have been widely used because of their outstanding chemical stability Although they are being severe restricted because of their ability to destroy the ozone layer and their greenhouse effect potential,they are still being used airconditioning systems in many fields.