【摘要】 对甲基丙烯酸羟丙酯(HPMA)/N-(11-羧基十一烷基)马来酰亚胺(CUMI)自由基共聚合体系进行研究,考察了共聚单体组成对共聚合反应转化率、共聚合初始反应速率、共聚物组成及分子量的影响.发现HPMA和CUMI共聚合体系可以在较宽的单体组成范围内得到交替共聚物;且当单体组成(HPMA/CUMI)的摩尔比为5/5时,共聚合初始反应速率最大.共聚单体对HPMA(M1)/CUMI(M2)在甲苯中的竞聚率分别为r1=0.01,r2=0.10.此外,采用1H NMR对共聚物进行了表征.更多还原

【Abstract】 The free radical copolymerization of hydroxypropyl methacrylate HPMA(M1) and N-(11-carboxyunde-cyl) maleimide CUMI(M2) was carried out with benzoyl peroxides(BPO) as an initiator in toluene at 80℃.The copo-lymerization of HPMA with CUMI in toluene proceeded in a heterogeneous system to give an alternating copolymer when the monomer of CUMI was over 50 mol% in the feed.It was found that the initial rate of copolymerization(Rp),copoly-mer compositions,and the number-average molecular weight of copolymers,were dependent on the monomer composi-tion and the maximumRpwas observed at about 50 mol% of CUMI in the feed.The monomer reactivity ratios were found to ber1= 0.01,r2= 0.10 in toluene.In addition,the copolymer was characterized by 1H NMR spectroscopy.更多还原