聚丙烯纤维共辐射接枝苯乙烯的研究

Study on graft of styrene onto polypropylene fiber by co-irradiation

以60Co γ射线为辐射源,在氮气保护下对聚丙烯(PP)纤维和苯乙烯-二乙烯苯在甲醇介质中进行共辐射接枝。结果表明,当接枝液中苯乙烯质量分数为20％-30％,辐射总剂量为25-50 kGy时,PP纤维的接枝率高。二乙烯苯相对苯乙烯的质量分数为2％时,纤维的接枝率和玻璃化转变温度最高,分别为701％和161.5℃。接枝反应离开辐射源后存在一定程度的后效应,放置一定时间和接枝液中加入适量无机酸均可有效提高PP纤维的接枝率。在相同条件下,用乙醇替代甲醇可以达到相近的接枝率。

The grafting copolymerization of styrene-divinylbenzene onto polypropylene fiber was studied by 60Co γ-ray co-irradiation in methanol medium and nitrogen protection. The results showed that the graft yield of PP fiber can be maximized when the weight mass ratio of styrene was 20%-30% and the irradiation dose was 25-50 kGy. And the graft yield and glass transition temperature of PP fiber reached their maximum of 701% and 161.5℃ with 2% divinylbenzene in styrene, respectively . Some after-effect occurred while removing the irradiation. The graft yield of PP fiber can be improved efficiently by depositing the fiber for a period of time and adding a moderate amount of inorganic acid into the grafting solution. Alcohol taking place of methanol generated the similar graft yield under the same conditions.