Investigation of the effects of reaction temperature on the latexes productivity

Poly(vinyl acetate-co-butyl acrylate) latexes were synthesized by applying semicontinuous emulsion polymerization method. Copolymerizations were carried out keeping constant monomer ratio of vinyl acetate:butyl acrylate as 85:15 at four different temperatures (55◦C, 60◦C, 65◦C and 70◦C) and constant stirring rate (350 rpm) with the using of N-methylol acrylamide as protective colloid, ammonium or potassium persulfate as thermal initiator, and 30 mole ethoxylated nonyl phenol as nonionic emulsifier. The characterization of synthesized latexes were done by determining pratic solid content, theoretical solid content and conversion using both value, Brookfield viscosity, particle size, the particle size distrubition, surface tension and surface charges of latexes.