Formation of living propagating polymer radicals in microspheres and their use in the synthesis of block copolymers
Formation of living propagating polymer radicals in microspheres and their use in the synthesis of block copolymers
复制标题
微球中活性增长聚合物自由基的形成及其在嵌段共聚物合成中的应用
DOI：
10.1007/3-540-15482-5_7
复制
发表时间：
1985
期刊：
影响因子：
--
通讯作者：
T. Otsu
中科院分区：
文献类型：
--
作者：
Tsuneyuki Sato;T. Otsu
当N-甲基丙烯酰胺(NMAAM)和N-甲基丙烯酰胺(NMMAm)等丙烯酰胺衍生物在适当的溶剂中由自由基引发剂聚合时，所得聚合物以含有活性传播自由基的微球形式分散。在NMMAm与AIBN在苯中的聚合反应中，逃逸氰丙基的溶剂笼以较高的产率转化为活性的聚(NMMAm)自由基，产率约为90%。这些活性聚合物自由基在室温下很容易与其他乙烯基单体反应，得到稳定增长的第二单体自由基，从而形成嵌段共聚物。用电子自旋共振对这些反应过程进行了研究。
When acrylamide derivatives such as N-methylacrylamide (NMAAm) and N-methylmethacrylamide (NMMAm) are polymerized in adequate solvents by radical initiators, the resulting polymers are dispersed as microspheres which contain living propagating radicals. In the polymerization of NMMAm in benzene with AIBN, the solvent-cage escaping cyanopropyl radicals are converted to living poly-(NMMAm) radicals in high yields, ca. 90%. These living polymer radicals react easily with other vinyl monomers at room temperature to give stable propagating radicals of the second monomers, resulting in block copolymers. These reaction processes were investigated by ESR.