A two-step process to make a poly(arylene sulfide sulfone) polymer exhibiting improved high temperature properties is described. In the first step a prepolymer characterized as dihalo-terminated polyethersulfone oligomers is prepared by reacting an aromatic diphenol with an excess of a dihalo aromatic sulfone. In the second step the excess dihalo aromatic sulfone and the oligomers are copolymerized in the presence of a sulfur source to form a poly(arylene sulfide sulfone) polymer. An alkali metal carboxylate is present in the second step. The polymers exhibit improved softening temperature and glass transition temperature and are useful in high temperature applications.
本文介绍了一种分两步制备聚(芳烯烃砜)聚合物的工艺,该聚合物具有更好的高温特性。在第一步中,通过芳香族二
酚与过量的二卤代芳香族砜反应,制备出以二卤代端聚醚砜低聚物为特征的预聚物。在第二步中,过量的二卤代芳香族砜和低聚物在
硫源存在下共聚形成聚芳基砜聚合物。碱
金属
羧酸盐存在于第二步中。这种聚合物的软化温度和
玻璃化温度都有所提高,适用于高温应用。