溶液聚合法合成苯乙烯-马来酸酐交替共聚物

Synthesis of Styrene-Maleic Anhydride Alternating Copolymers by Solution Polymerization

在过氧化苯甲酰(BPO)引发下,以丁酮为溶剂,采用溶液聚合法合成了苯乙烯-马来酸酐共聚物,并详细研究了温度、引发剂用量、苯乙烯与马来酸酐配比、单体(苯乙烯与马来酸酐)质量分数及聚合时间对聚合反应的影响。研究表明,在温度80℃,x(BPO)=0.6%(相对于苯乙烯与马来酸酐),n(苯乙烯)∶n(马来酸酐)=1∶1,w(单体)=15%(相对于混合溶液),反应时间4 h的条件下,聚合物收率可达99%。采用13CNMR、IR、GPC、元素分析对共聚物结构进行了表征。利用TG测定了其热稳定性。结合共聚物的元素分析与13CNMR的分析结果,表明合成的苯乙烯-马来酸酐共聚物是一种交替共聚物。

Styrene-maleic anhydride copolymer was synthesized by the solution polymerization method,with benzoyl peroxide（BPO） as initiator and butanone as solvent.The influence of polymerization temperature,initiator dosage,ratio of styrene to maleic anhydride,monomer（styrene and maleic anhydride） mass fraction and reaction time on polymerization was discussed in detail.The research showed that the yield of the copolymer reached 99% under the conditions of 80 ℃ of the polymerization temperature,0.6% of initiator dosage,1∶1 of molar ratio of styrene to maleic anhydride,15% of monomer mass fraction and 4 h of reaction time.The structure of the copolymer was confirmed by 13CNMR、IR、GPC and elementary analysis.The thermal stability of the copolymer was tested by TG.Based on the analysis results of elementary analysis and ^13CNMR of the product,the structure of styrene-maleic anhydride copolymer was confirmed to be the alternating copolymer.