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采用两种方法合成高分子量的聚4—羟基苯甲酸酯1)由新的单体,4—三甲基甲硅烷氧苯甲酰氯进行溶液缩聚,产率为84—86%,分子量为20000—21000;2)由单体4—乙酰氧苯甲酸进行溶液缩聚,产率为85—90,分子量为15000—16090。用未经蒸溜提纯过的4—三甲基甲硅烷氧苯甲酰氯进行缩聚,产率可增至97—100%,分子量增至100000,其原因是杂质起了有利于反应的作用,这对本产品将来的工业化生产有重要意义。
Synthesis of high molecular weight poly 4-hydroxybenzoate using two methods 1) A new monomer, 4-trimethylsiloxybenzoyl chloride solution polycondensation, the yield was 84-86%, the molecular weight of 20,000 -21000; 2) solution polycondensation from the monomer 4-acetoxybenzoic acid, the yield was 85-90, the molecular weight of 15000-16090. Polycondensation with 4-trimethylsiloxybenzoyl chloride, which had not been purified by distillation, increased the yield to 97-100% and increased the molecular weight to 100,000 due to the fact that impurities played a role in favor of the reaction The future industrial production of products of great significance.