Abstract: Dispersion polymerization of DMDAAC (dimethyl diallyl ammonium chloride) and AM (acrylamide) in an alcoholwater media was studied. The effect of the following six factors were mainly studied: the mass ratio of alcohol to water, monomer content, the inolar ratio of AM to DMDAAC, the initiator dosage, initiation temperature and EDTA on the intrinsic viscosity and conversion efficiency of copolymerization. The structure and surface shape of the polymers were studied by means of IR and transmission electron microscope (TEM). The result shows that the product with intrinsic viscosity as 94.77(cm3／g) was obtained under the following optimized conditions: m(alcohol)∶m(water)=1∶1, monomer content= 40％, n(DMDAAC)∶n(AM)=2∶8, the mass fraction of initiator K2S2O8=0.04％, initiation temperature=40℃ and the mass fraction of stabilizer PVP is 4％ of the monomer.

Key words: intrinsic viscosity , conversion efficiency, P(DMDAAC-AM), dispersion polymerization