Kinetics on Semi-Continuous Emulsion Polymerization of Organosilicone-Modified Acrylate Nanolatexes

The kinetics on semi-continuous emulsion copolymerization of organosilicone-modified acrylate nanolatex synthesized from acrylate and triethoxyvinylsilane (A151) as monomers and mixed emulsifiers were studied. The effect of the mass percents of emulsifier,initiator,A151,methacrylic acid 2-hydroxyethyl ester (HEMA) and methacrylic acid (MAA) as well as the reaction temperature on polymerization reaction rate was investigated. The results show that the polymerization reaction rate increases with the mass percents of emulsifier,initiator,HEMA,MAA and reaction temperature,but decreases with the mass percent of A151. The kinetic relationship of the semi-continuous emulsion copolymerization was Rp=kC0.2757EC0.1446IC-0.3672A151C0.0941HC0.0576M. The constant-rate interval is in the monomer conversion of 20%～80%. The apparent activation energy in constant-rate interval is found to be 42.90 kJ/mol.