By maintaining an arylenesulfide prepolymer with a melt viscosity of 5 to 3,000 poise at a temperature of 245 to 290 °C under a liquid-liquid two-phase separated state in a solvent for 1 to 50 hours, the molecular weight of said prepolymer is increased to a high to ultra-high value while the linearity of the polymer is retained.
在 245 至 290 °C 的温度下,将熔融粘度为 5 至 3,000 poise 的亚芳基
硫醚预聚物在溶剂中以液液两相分离的状态保持 1 至 50 小时,可将所述预聚物的分子量提高到高至超高值,同时保持聚合物的线性。