The fluoropolymer typified by PTFE, when irradiated with radiation, has been regarded as a radiation degradable polymer because the cleavage reaction of the polymer chain takes precedence over the crosslinking reaction.
In this study, it was found that radiation crosslinking reaction proceeds at a temperature lower than the melting point of PFA (tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer) when a small amount of reactive end group exists at the polymer end of PFA.
By radiation crosslinking PFA molded products, heat resistance, abrasion resistance and stress crack resistance were greatly improved.
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