两性纤维素接枝共聚物的合成研究(英文)

Studies on Synthesis of Amphoteric Cellulosic Graft Copolymers

采用ＫＭｎＯ４／Ｈ２ＳＯ４氧化还原引发体系，首次将羧甲基纤维素（ＣＭＣ）与二甲基二烯丙基氯化铵（ＤＭＤＡＡＣ）进行接枝聚合，制备了一系列分子中同时含有阴离子羧甲基和阳离子季铵基团的两性纤维素接枝共聚物．研究了ＣＭＣ取代度、ＤＭＤＡＡＣ加量、ＫＭｎＯ４用量和Ｈ２ＳＯ４浓度对接枝共聚的影响。

A series of amphoteric cellulosic graft copolymers, containing anionic carboxymethyl and cationic quaternary ammonium groups, were prepared by the graft copolymerization of carboxymethylcellulose(CMC) with dimethyldiallylammonium chloride(DMDAAC) using potassium permanganate/sulphuric acid initiation system under different conditions.Major factors affecting the polymerization reaction,such as the degree of substitution(DS) of CMC, the amount of DMDAAC, acid concentration and the amount of initiator, were studied, and the mechanism for grafting of DMDAAC onto CMC using the KMnO 4/H 2SO 4 redox system was elucidated.