In the present work, a new series of cross-linked copolymers based on itaconic anhydride and methyl methacrylate were prepared employing free radical copolymerization in the presence of azobisisobutyronitrile as an initiator and 2-butanone as a solvent under microwave irradiation. The copolymers containing itaconic anhydride (ITA) and methyl methacrylate (MMA) were chosen due to the formation of long-term stable anhydride moieties, which might be useful to attach enzymes covalently with numerous applications in water treatment. The copolymerization process was carried out in the presence of two types of cross-linking agent, namely, ethylene dimethacrylate (EDMA) and divinylbenzene (DVB) in a range of 0-20% () to explore their effect on the thermal and stiffness properties of the obtained cross-linked copolymers. Increasing the ratio of the cross-linking agent, the copolymers prefer to precipitate rather than form a gel during the polymerization process. While using ethylene dimethacrylate as a cross-linking agent, the copolymers change from porous to stiffness structures depending on the molar ratio of the monomers used during the polymerization. On the other hand, using divinylbenzene as a cross-linking agent, the stiffness structure was obtained in all cases and there is no effect observed for the monomer’s ratio or the percentage of cross-linking agent on the morphology of the prepared copolymers.

中文翻译：

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微波辅助合成交联共聚（衣康酸酐-甲基丙烯酸甲酯）：摩尔比和交联剂对热稳定性的影响

在本工作中，在微波辐射下，在偶氮二异丁腈作为引发剂和2-丁酮作为溶剂的存在下，通过自由基共聚制备了一系列基于衣康酸酐和甲基丙烯酸甲酯的交联共聚物。选择含有衣康酸酐（ITA）和甲基丙烯酸甲酯（MMA）的共聚物是因为形成了长期稳定的酸酐部分，这对于在水处理中的许多应用中可能有用地共价连接酶。共聚过程是在两种交联剂的存在下进行的，两种交联剂的范围为0-20％（二甲基丙烯酸乙烯酯（EDMA）和二乙烯基苯（DVB）（）以探讨它们对所得交联共聚物的热和刚度性能的影响。增加交联剂的比例，共聚物在聚合过程中更倾向于沉淀而不是形成凝胶。当使用二甲基丙烯酸乙烯酯作为交联剂时，共聚物根据聚合过程中所用单体的摩尔比而从多孔结构变为刚性结构。另一方面，使用二乙烯基苯作为交联剂，在所有情况下均获得了刚性结构，并且单体比例或交联剂的百分比对所制备的共聚物的形态没有影响。