用~(13)C-NMR方法研究了丁二烯(BD)-丙烯酸甲酯(MA)、异戊二烯(IP)-MA和氯丁二烯(CP)-MA交替共聚物(分别简称为PBM、PIM和PCM)的联接方式和微观结构。在PBM中,BD单元以反-1,4-结构存在,并有少量的顺-1,4-和1,2-结构,其比例为88:7:5;在PIM和PCM中,IP与CP单元也主要以反-1,4-结构存在,与MA以“头-头”方式相连接。在PCM中还有少量CP-CP相连接的结构,交替度较低,而PBM和PIM则完全是交替结构。 The copolymers of butadiene (BD) -methyl acrylate (MA), isoprene (IP) -MA and chloroprene (CP) -MA were studied by ~ (13) For the PBM, PIM and PCM) connection and microstructure. In PBM, BD units exist in trans-1,4-structure with a small amount of cis-1,4- and 1,2-structures in a ratio of 88: 7: 5. In PIM and PCM, IP and The CP unit also exists mainly in the trans-1,4-structure and is connected to the MA in a “head-to-head” manner. In the PCM there is a small number of CP-CP connected structure, the degree of alternation is low, while PBM and PIM are completely alternating structure.