关键词: 二甲基二烯丙基氯化铵, 共聚, AIBA•, 2HCl-RH引发剂, 竞聚率, 表观活化能

Abstract: By using AIBA·2HCl-NaHSO₃ initiation system，a series of high intrinsic viscosity copolymers of dimethyl diallyl ammonium chloride(DMDAAC) and acrylamide(AM) were prepared in aqueous medium under different conditions.The effects of various factors such as initiator concentration, pH of solution, composite initiator and the way of feeding AM etc.on the copolymerization of dimethyl diallyl ammonium chloride and acrylamide were studied. The results indicated that copolymerization could be initiated at a low temperature.At 30℃,n_AM∶n_DMDAAC=4∶1,ω(monomer)=30％,c(AIBA·2HCl)=1.0×10^-4 mol·L^-1，when the monomer solution was polymerized at pH=7.0，the intrinsic viscosity of PDMDAAC-AM was 11.56 dl·g^-1;when the monomer solution was polymerized at pH=10.0，the intrinsic viscosity of copolymer was up to 13.60 dl·g^-1.If continuous feeding of AM was used , the cationicity and intrinsic viscosity of copolymer could attain 38.8％ and 11.61 dl·g^-1.Furthermore, the monomer reactivity ratios and apparent activation energy of the polymerization system were determined.

Key words: 二甲基二烯丙基氯化铵, 共聚, AIBA•, 2HCl-RH引发剂, 竞聚率, 表观活化能