THE INFLUENCES OF INORGANIC SALTS ON THE MELT-POL YCONDENSATION OF POTASSIUM SALT OF 4-CHLORO-4''-HYDROXYDIPHENYLSULFONE UNDER REDUCED PRESSURE
盐类对4-氯-4′-羟基二苯砜钾盐真空熔融聚合的影响

The specific behaviour of some inorganic salts as diluents in melt-polyeondensa-tion of the potassium salt of 4-chloro-4'-hydroxy diphenyl sulfone under reduced pressure was studied. Alkali metal salts have little or no effect, but alkali earth metal and other metal salts depress the product molecular weight greatly. It was shown that sodium chloride can be used as solid diluent to give better temperature control in the polycondensation reaction.