顺丁烯二酸/甲基丙烯酸甲酯共聚物的合成

Synthesis of Maleic Acid/Methyl Methacrylate Copolymer

选用顺丁烯二酸(分析纯)和甲基丙烯酸甲酯(分析纯)为共聚物单体,过氧化苯甲酰为引发剂,通过本体聚合法制备主浆料。研究了单体配比、加热时间、反应温度、引发剂用量对共聚物性能的影响,并利用红外光谱、热重分析仪对共聚物进行了表征。通过试验优化,当单体物料比为1∶2,加热时间为5h,反应温度为68℃,引发剂用量为9%时,制备的顺丁烯二酸/甲基丙烯酸甲酯共聚物成分均匀,重均分子量为7.970×105,200℃以下热稳定性良好。

Using maleic acid(AR)/methyl methacrylate(AR)as copolymer monomer,benzoyl peroxide as initiator,the main slurry was prepared by bulk polymerization method.The influence of monomer ratio,heating time,reaction temperature,and initiator dosage on copolymer properties was studied.The copolymer was characterized by infrared spectrum and thermogravimetric analyzer.Through experimental optimization,when the monomer ratio was 1∶2,the heating time was 5 h,the reaction temperature was 68℃,and the initiator dosage was 9%,the composition of the maleic acid/methyl methacrylate copolymer was homogeneous,the weight average molecular weight was 7.970×10 5.The thermal stability of the copolymer was good below 200℃.