甲基丙烯酸甲酯、苯乙烯与顺丁烯二酸二丁基锡三元共聚物的合成与表征

Synthesis and Characterization of Terpolymer of Methyl Methacrylate, Styrene and Dibutyltin Maleate

以过氧化苯甲酰 (BPO)为引发剂 ,将顺丁烯二酸二丁基锡 (DBTM )与苯乙烯 (St)、甲基丙烯酸甲酯(MMA)进行本体三元共聚反应 ,探讨了共聚反应条件 .用液相色谱、红外光谱、核磁共振氢谱和热重分析对共聚物的结构和性能进行了表征 .动态热流变性实验结果表明 ,在含锡量相同的情况下 ,共聚物对PVC的热稳定效果优于DBTM ,可以作为多功能化的PVC热稳定剂 .

Benzoic peroxide(BPO) was used as an initiator in bulk terpolymerization of dibutyltin maleate(DBTM), methyl methacrylate(MMA) and styrene(St). The conditions of copolymerization were discussed. The copolymer was characterized by GPC, IR, ~1H NMR and TG analysis; and the results showed the occurrence of copolymerization. The number-average molecular weight of terpolymer was above 10~4. The dynamic thermorheological test showed that, the thermal stability of copolymer was superior to that of DBTM. It may be used as polyfunctional PVC stabilizer.