【摘 要】
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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
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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 and a,a-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.
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