R-ATRP of Acrylamide under the Action of Copper Complex System in Aqueous Two-Phase

Kai Liu; Ya Feng Cao; Yuan Li; Zhao Li Liu; Feng Zhi Tan

doi:10.4028/www.scientific.net/AMR.652-654.430

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R-ATRP of Acrylamide under the Action of Copper Complex System in Aqueous Two-Phase
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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 652-654R-ATRP of Acrylamide under the Action of Copper...

R-ATRP of Acrylamide under the Action of Copper Complex System in Aqueous Two-Phase

Abstract:

Polyacrylamide (PAM) was synthesized by combining reverse atom transfer radical polymerization (R-ATRP) with aqueous two-phase polymerization. In aqueous two-phase system, polyethylene glycol 20000 (PEG20000) is used as dispersing agent, potassium persulfate (KPS) and Cu(en)²⁺ are used as initiator and control agent, respectively. In this paper the effect of monomer concentration, the amount of Cu(en)²⁺, reaction temperature, the ratio of Cu(Ⅱ), and ethylenediamine (en) were investigated. The experimental result shows the optimum conditions are as follows: m(AM)∶m(PEG)=1∶1, the monomer concentration is 10%, n(AM)∶n(CuCl₂•2H₂O)∶n(en)∶n(KPS)=3000∶10∶20∶1, polymerization time is 6 h, and polymerization temperature is 45°C. Under these conditions, the monomer conversion is 91.5%，the linear correlation coefficient is 0.9911.