In this paper, the copolymerization of saccharin methacrylamide (1) with conjugated dienes [2,3-dimethyl butadiene (DMBD) and isoprene (IP)] as comonomers toward advanced sequence control is studied. Both monomers are consumed at the same rate in the copolymerization despite the lack of homopolymerization ability of 1, indicating that the alternating copolymerization likely progresses. The resultant copolymers are transformed into methyl methacrylate (MMA)-diene alternating copolymers via direct methanolysis reaction for the copolymerization solution. The alternating sequence is characterized by NMR analyses in comparison with the corresponding statistical copolymers. As for the copolymer with IP, the remaining carboncarbon double bonds are hydrogenated for the synthesis of advanced sequence-controlled polymer, MMA-(propylene-ethylene) alternating-copolymer.

中文翻译：

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糖精甲基丙烯酰胺与二烯共聚形成更柔软的交替共聚物和先进的序列控制

本文研究了糖精甲基丙烯酰胺 ( 1 ) 与共轭二烯 [2,3-二甲基丁二烯 (DMBD) 和异戊二烯 (IP)] 作为共聚单体的共聚反应，以实现先进的序列控制。尽管缺乏1的均聚能力，但两种单体在共聚中以相同的速率消耗，表明交替共聚可能进行。所得共聚物通过共聚溶液的直接甲醇分解反应转化为甲基丙烯酸甲酯（MMA）-二烯交替共聚物。与相应的统计共聚物相比，交替序列的特征是通过 NMR 分析。至于带IP的共聚物，剩余的碳碳双键被氢化用于合成先进的序列控制聚合物MMA-（丙烯-乙烯）交替共聚物。