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A novel cross-linking process using two high molecular weight aromatic poly(thioether)s,which were synthesized by the reactions of 4,4′-thiobisbenzenethiol with 4,4′-difluorobenzophenone and 4,4′-difluorodiphenylsulfone,respectively, and commercially available lower molecular weight poly(p-phenylene sulfide)was investigated.These reactions were carried out in bulk by the addition of silver tetrafluroborate andα,α′-dibromo-p-xylene at 190℃over a period of 45 min. Furthermore,the same procedure could be modified to cross-link compression-molded films of these three polymers.The thermal and solubility behaviors of these polymers before and after cross-linking reactions,are presented.
A novel cross-linking process using two high molecular weight aromatic poly (thioether) s, which were synthesized by the reactions of 4,4’-thiobisbenzenethiol with 4,4’-difluorobenzophenone and 4,4’-difluorodiphenylsulfone, respectively, and commercially available lower molecular weight poly (p-phenylene sulfide) was investigated. These reactions were carried out in bulk by the addition of silver tetrafluroborate and α, α’-dibromo-p-xylene at 190 ° C over a period of 45 min. same procedure could be modified to cross-link compression-molded films of these three polymers. The thermal and solubility behaviors of these polymers before and after cross-linking reactions, are presented.