【摘要】 碳酸乙烯撑酯在溶液聚合和本体聚合反应中都存在程度较大的链转移反应。在通常的本体聚合中，活性自由基易发生向大分子链的氢原子转移反应，从而导致聚合物交联；在溶液聚合中，大分子自由基则易与溶剂分子进行链转移反应，聚合结果一般只能得到低分子量聚合物，经测定，６０ ℃下二甲基甲酰胺在碳酸乙烯撑酯聚合体系中链转移常数高达０．０２４８。更多还原

【Abstract】 Polymerization of vinylene carbonate was carried out in both solution and bulk. It was found that products of bulk polymerization were crosslinked, that may be due to transfer reaction between living chain radicals and macromolecules. In solution polymerization, only low molecular weight polymer were obtained because of chain transfer reaction with solvents. Chain transfer ratio of DMF at 60 ℃ in polymerization of vinylene carbonate was 0.0248 according to results of measurements.更多还原