Aqueous RAFT Polymerization of Acrylamide:A Convenient Method for Polyacrylamide with Narrow Molecul

• 作 者: Jun Liang 单国荣 Peng-ju Pan
• 机 构: State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering,Zhejian
• 出 处: Chinese Journal of Polymer Science
• 发表日期: 2017年01期
• 关键词: polymerization acrylamide fragmentation reversible narrow friendly acetic monome

Controlled and homogeneous free-radical polymerization of acrylamide(AM) in aqueous phase was realized by using S,S’-bis(α,α’-dimethyl-α’’-acetic acid)-trithiocarbonate as a reversible addition-fragmentation transfer(RAFT) agent. Linear increases in molecular weight with conversion and narrow molecular weight distribution were observed for polyacrylamide(PAM) throughout the polymerization. By this method, PAMs with controlled molecular weight(up to 1.0 × 10~6) and narrow molecular weight distribution(M_w/M_n < 1.2) were prepared. This study provides an effective method for synthesis of PAMs with narrow molecular weight distribution under environmentally friendly conditions.

Controlled and homogeneous free-radical polymerization of acrylamide (AM) in aqueous phase was realized by using S, S’-bis (α, α’-dimethyl-α "-acetic acid) -trithiocarbonate as a reversible addition-fragmentation transfer RAFT) agents. Linear increases in molecular weight with conversion and narrow molecular weight distribution were observed for polyacrylamide (PAM) throughout the polymerization. By this method, PAMs with controlled molecular weight (up to 1.0 × 10 ~ 6) and narrow molecular weight distribution (M_w / M_n <1.2) were prepared. This study provides an effective method for synthesis of PAMs with narrow molecular weight distribution under environmentally friendly conditions.