Effect of preparation conditions on property for strong alkali polypropylene anion exchange fiber

An alkali anion-exchange fiber was synthesized by grafting copolymerization of styrene onto polypropylene fiber induced by ⁶⁰Co γ co-irradiation, cholormethylation and amination reactions. The effects of reaction conditions on grafting yield, ion-exchange capacity and mechanical strength were studied. The results show that the grafting yield is higher and the mechanical strength is better when the dose rate is 0.5 kGy/h-1.0 kGy/h, co-irradiation time was 5 h-8 h, and divinylbenzene content is 2%. The produced fiber has greater ion-exchange capacity and higher mechanical strength under the conditions of chloromethylation temperature 40°C-45°C, duration 15 h-20 h, mination temperature 30°C and duration 15 h-20 h. This fiber has been widely applied in adsorption and separation fields such as determination of trace palladium in automotive catalyzer, distilling and separating of medicament, decoloration of cane sugar juice, water treatment and so on.