【摘要】 对4,4′-二羟基二苯砜二钾盐与4,4′-二氯二苯砜的溶液缩聚,进行了较系统的研究:选择了环丁砜为聚合介质,二甲苯作带水剂;研究了缩聚温度,时间及固含量的影响;讨论了单体配比及碱用量对双酚S配比变化对聚合物分子量的影响,在成盐时添加K₂CO₃可减少产物分子量的波动范围。讨论了影响聚芳砜在加工温度下的热稳定性的因素,并建议了控制后处理过程的方法,最后列出了全对位聚芳砜的主要性能。更多还原

【Abstract】 A detailed study on the solution polycondensation of dipotassium salt of 4,4’-dihydroxydiphenylsulfone and 4,4’-dichlorodiphenylsulfone is performed. Sulfolane is chosen as polycondensation media while mixed xylene is used for azeotropic removal of water during the formation of dipotassium salt. Effects of polycondensation temperature, time and solid content have been studied. Influences of monomer ratio and ratio of alkali to bisphenol-S during salt formation on product molecular weight have been discussed and a method is proposed for reducing the amplitude of fluctuation of product molecular weight by addition of potassium carbonate besides potassium hydroxide during salt formation. Factors influencing heat stability of polyarylsulfone at processing temperatures are discussed, and method for quality control of the after treatment step has been recommended. The chief properties of PAS obtained are also listed.更多还原