Preparation and Properties of Amphoteric Polyvinylamine
In this paper,Poly(n-vinyl formamide-co-acrylic acid)copolymer was prepared by free radical polymerization in aqueous solution with n-vinyl formamide and acrylic acid as main monomers,the copolymer was hydrolyzed by alkali to prepare poly(vinyl amine-co-acrylic acid).The effects of monomer concentration,initiator concentration,reaction temperature and time on monomer conversion and intrinsic viscosity of polymer were investigated.The preparation method has the advantages of simple process,controllable molecular weight and amino content of the product.The performance of the polymer in the wet end of papermaking was also investigated.The polymer had obvious synergistic effects on paper strengthening,retention and drainage,ash retention and sizing.
n-vinyl formamideamphoteric polyvinylaminereinforcementretention and drainage aidsizing effect
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