Cationic polymers are an interesting class of macromolecules due to their versatility and emerging properties that can be used for various industrial and biomedical purposes. This report is focused on investigating the use of microwave heating in the reversible addition–fragmentation chain transfer polymerization of functional cationic monomers, N‐(3‐aminopropyl)methacrylamide hydrochloride (APMA) and N‐[3‐(dimethylamino)propyl]methacrylamide (DMAPMA). Under comparable polymerization reaction conditions, the microwave‐assisted reaction achieves up to 270% (APMA) and 375% (DMAPMA) rate enhancement over conventional oil‐bath mediated set‐up. Linear relationships are observed between number average molecular weight and monomer conversion for different target degrees of polymerization to give low‐ to high‐molecular‐weight cationic polymers. Chain extension experiments show increase in molecular weight of the cationic polymers with narrow dispersities (Ð < 1.2) indicating retention of the chain transfer agent with no observable aminolysis or hydrolysis during polymerization.

中文翻译：

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微波混合溶剂中阳离子单体的微波辅助可逆加成-断裂链转移聚合

阳离子聚合物是一类有趣的大分子，因为它们的多功能性和新兴特性可用于各种工业和生物医学目的。本报告重点研究功能性阳离子单体，N-（3-氨基丙基）甲基丙烯酰胺盐酸盐（APMA）和N的可逆加成-断裂链转移聚合中微波加热的应用-[3-（二甲氨基）丙基]甲基丙烯酰胺（DMAPMA）。在可比的聚合反应条件下，微波辅助反应与常规油浴介导的装置相比，可实现高达270％（APMA）和375％（DMAPMA）的速率增强。在不同的目标聚合度下，观察到数均分子量与单体转化率之间存在线性关系，从而得到低至高分子量的阳离子聚合物。扩链实验表明，阳离子聚合物的分子量增加，且分散度较窄（η <1.2），表明链转移剂得以保留，在聚合过程中没有可观察到的氨解或水解作用。