Abstract: The grafting copolymerization of styrene-divinylbenzene onto polypropylene fiber by 60Coγ-rays was carried out and several influence factors were studied. With the increase of the amount of materials in the test，the dose rate of radiation should be diminished to assure that the graft polymerization reaction could be carried out smoothly and uniformly. When dose rate was 0.8 kGy·h－1 and reaction time was 7 h，the intake yield of products was 280%～293% and the products had good mechanical property. Methanol as solvent can be reused. Strong acidic ion-exchange fiber was prepared by sulfonating the grafted copolymer with sulfuric acid and its exchange capacity was 3.7～4.2 mmol·g^－1.

摘要： 以⁶⁰Co-γ射线为辐射源，引发聚丙烯纤维共辐射接枝苯乙烯–二乙烯苯，研究了反应物料达到中试生产规模时剂量率、辐射时间以及回收的母液对接枝纤维导入率的影响。结果表明，反应物料增加后，剂量率需适当降低才能保证接枝反应平稳、均匀地进行。当聚丙烯纤维质量为20 kg、单体浓度25%、剂量率0.8 kGy·h-1、辐射时间7 h时，接枝纤维导入率为280%～293%且力学性能良好。共辐射过程中使用的母液可重复利用。将接枝纤维磺化后制备的强酸性离子交换纤维交换容量可达到3.7～4.2 mmol·g^－1。