聚丙烯基弱酸阳离子交换纤维的制备及机理研究

Preparation of weak-acid type cation-exchange fiber from polypropylene fiber and Its reaction mechanism

采用^(60)Co-γ射线预辐照接枝法,研究了聚丙烯(PP)纤维与丙烯酸(AA)在水溶液中的接枝共聚反应。通过正交实验设计法对反应影响因素进行了优化,结果表明,预辐照总剂量为25kGy,反应温度50℃,单体AA的浓度为20%,反应时间2h时,所得接枝纤维的交换容量较高,为9．85mmol/g。还对预辐照接枝的反应机理进行了研究。

Weak-acid type cation-exchange fiber based on polypropylene fiber was synthesized by preirradiationinduced graft polymerization of acrylic acid and the reaction mechanism was studied. The condition of the preparation was investigated by orthodoxy experimental method. The optimum reaction conditions of gaining higher exchange capacity are as follows： Preirradiation total dose was 25kGy, reaction temperature 50℃, monomer concentration 20%, reaction time 2h, the maximum exchange capacity was 9.85mmol/g under this testing condition and the average was 9.65mmol/g. Reaction mechanism of preirradiation-induced graft polymerization was also studied.