Research On The Polymerization Process Of DAC And DMC

Polymerization processes of poly acryloyloxyethyltrimethyl ammonium chloride(PDAC), poly(acryloyloxyethyltrimethyl ammonium chloride-co-acrylamide)(P(DAC-AM)) with cationicity of30%and poly(methacrylatoethyltrimethyl ammonium-co-acrylamide)(P(DMC-AM)) with cationicity of30%were studied in this paper.Using industrial monomer acryloyloxyethyltrimethyl ammonium chloride (DAC) as a raw material and A as a initiator, homopolymer PDAC was preparated by a method of adding raw materials in one shot and initiating the polymerization in three temperature points. PDAC colloid product with intrinsic viscosity7.42dL/g, weight-average molecular weight2.579×106and monomer conversion93.56%could be obtained through orthonormal optimal experiments.Using industrial monomer DAC, acrylamide (AM) as raw materials and A as a initiator, copolymer P(DAC-AM) with cationicity of30%was preparated by a method of adding raw materials in one shot and initiating the polymerization in two temperature points. P(DAC-AM) colloid product with cationicity of30%, intrinsic viscosity17.23dL/g, weight-average molecular weight1.155×107and monomer conversion98.02%could be obtained through preliminary and orthonormal experiments. After drying a P(DAC-AM) colloid product under60℃and crushing, the intrinsic viscosity of P(DAC-AM) powder product was12.01dL/g, monomer conversion was99.07%, the dissolution time was15min.Using industrial methacrylatoethyltrimethyl ammonium chloride (DMC), AM as raw materials and B as a redox initiator, copolymer P(DMC-AM) with cationicity of30%was preparated by a method of adding raw materials in one shot and initiating the polymerization in two temperature points. P(DMC-AM) colloid product with cationicity of30%, intrinsic viscosity11.43dL/g, weight-average molecular weight1.325×106and monomer conversion99.12%could be obtained through preliminary and orthonormal experiments.On the basis of the optimal process conditions, the effects of process factors on intrinsic viscosity and monomer conversion of the products such as PDAC, P(DAC-AM) with cationicity of30%and P(DMC-AM) with cationicity of30%were investigated, respectively. The some representative samples of above products were characterized by IR,1H-NMR and GPC.Through the researches, the preparation methods of high molecular weight PDAC, P(DAC-AM) with cationicity of30%and P(DMC-AM) with cationicity of30%were established respectively, which have offered a feasible foundation for preparation process, mechanism and application researches of high, a series of intrinsic viscosities and different cationic polymers from DAC or DMC.