Synthesis and characterization of a 2,4,6,8-tetravinyl-2,4,6,8-tetramethylcyclotetrasiloxane (D_4~(Vi))-acrylate copolymeric latex

A 2,4,6,8-tetravinyl-2,4,6,8-tetramethylcyclotetrasiloxane (D4Vi)-acrylate polymer latex has been prepared by the method of one-stage addition using 2,4,6,8-tetravinyl-2,4,6,8-tetramethylcyclotetrasiloxane (D4Vi),methyl methacrylate (MMA),butyl acrylate (BA) and acrylic acid (AA) as precursors. The effects of different types of catalyst,catalyst amount and reaction temperature on the extent of conversion of D4Vi were investigated. The structure and morphology of the latex products were characterized by FT-IR spectroscopy,TEM and AFM. The results indicated that a D4Vi-acrylate latex with a smooth surface coating and no obvious phase separation can be prepared using D4Vi,MMA,AA and BA with a polymerization temperature of 80 ℃ using HCl as a catalyst,with a catalyst loading of 1.8% of the mass of D4Vi.