A method for production of a uniform polymer of high molar mass is provides, the method comprising: (a) polymerizing cyclic imino ether monomer in a first reaction mixture by cationic ring opening polymerization to produce a polymerized first reaction mixture containing (i) polymerized material and (ii) solvent and/or unreacted cyclic imino ether monomer; (b) separating solvent and/or unreacted cyclic imino ether monomer from polymerized material contained in the polymerized first reaction mixture; (c) copolyerizing by cationic ring opening polymerization a second liquid reaction mixture containing cyclic imino ether monomer and solvent by combining the separated unreacted cyclic imino ether monomer and/or the separated solvent with other components. Also disclosed are polyoxazoline polymers comprising at least 50 wt. % of repeating units derived from a 2-substituted 2-oxazoline monomer selected from 2-methyl-2-oxazoline, 2-ethyl-2-oxazoline, 2-n-propyl-2-oxazoline, 2-i-propyl-2-oxazoline and combinations thereof, said polymer having a DP of at least 250 and a very low dispersity.
本发明提供了一种生产高摩尔质量均匀聚合物的方法,该方法包括(a) 通过阳离子开环聚合使第一反应混合物中的环亚
氨基醚单体聚合,生成聚合后的第一反应混合物,该混合物含有(i) 聚合材料和(ii) 溶剂和/或未反应的环亚
氨基醚单体;(b) 从聚合的第一反应混合物中分离出溶剂和/或未反应的环亚
氨基醚单体; (c) 将分离出的未反应的环亚
氨基醚单体和/或分离出的溶剂与其他组分混合,通过阳离子开环聚合反应共聚出含有环亚
氨基醚单体和溶剂的第二液体反应混合物。还公开了聚
恶唑啉聚合物,该聚合物包含至少 50 重量%的重复单元,这些重复单元由 2-取代的 2-
恶唑啉单体衍生而来,该单体选自
2-甲基-2-恶唑啉、2-乙基-2-
恶唑啉、2-正丙基-2-
恶唑啉、
2-异丙基-2-恶唑啉及其组合,所述聚合物的 DP 至少为 250,分散性极低。