Poly(VAc-co-EA)공중합체 제조에 있어 보호콜로이드의 영향에 관한 연구

Effect of protective colloid on the synthesis of Poly(Vinyl acetate-co-Ethyl acrylate)

Polyvinyl acetate (PVAc) prepared by emulsion polymerization has broad applications for additive such as paint binder, adhesive for wood and paper due to its low glass transition temperature which help to plasticize substrate resins. Since emulsion polymerization has a disadvantage that surfactant and ionic initiator degrade properties of the product polymer，poly(vinyl acetate-co-ethyl acrylatε) (VAc-EA) was synthesized using potassium persulfate as catalyst and polyvinylalcohol (PVA) as protective colloid to prevent the degradation. The copolymer latex product was internally plasticized and has enhanced adhesion, water resistance during VAc-EA emulsion polymerization. No coagulation and complete conversion occur with the reactant mixture of 10 mmol/L potassium persulfate, 10 mmol/L poly(vinyl alcohol) (PVA 17). As the concentrations of PVA increase, the viscosity becomes increase.