聚丙烯纤维共辐射接枝苯乙烯-二乙烯苯的研究

Study on radiation induced graft of styrene-divinylbenzene onto polypropylene fiber

以Coγ射线为辐射源,研究了聚丙烯(PP)纤维共辐射接枝苯乙烯?二乙烯苯反应中的影响因素。结60果表明,当单体浓度为20%—25%,吸收剂量>15kGy时,自由基利用率高,产生的共聚物少,导入率高。接枝反应前纤维在接枝液中的溶胀时间大于7h以上,可避免扩散效应对反应的影响,提高导入率。当溶剂以溶胀作用为主导作用时,可促进接枝反应的进行。同时保持一定的接枝反应后效应时间,可提高导入率。通过研究,得到了接枝反应的最佳工艺条件,制备出导入率在200%—280%且机械强度很好的产品,为工业化生产离子交换纤维提供了良好的中间产品。

Some influencial factors of radiation induced graft of styrene-divinylbenzene onto polypropylene fibers have been studied by Co γ-rays. The results show that the self-polymerization will be less and the intake yield 60 will be higher with monomer concentrations of 20%—25%, and the absorbed dose is higher than 15kGy. When the polypropylene fiber soaked in the graft solution for over 7h before the reaction, the influence of diffusion on the reaction can be avoided, with increased intake yield. Moreover, if the swelling is the dominant effect and the definite after-reaction time is kept, the intake yield improves. The best process of radiation induced grafting reaction was obtained by the study. The intake yield of products is 200%—280%, with a good mechanical property. It provides the eligible intermediate product for the large-scale production of ion exchange fiber.