Study on Emulsion Polymerization of Polysiloxane Under Microwave Irradiation
YANG Bo, CHEN Riping, HE Hui, JIA Demin (Department of Polymer Material and Engineering, South China University of Technology, Guangzhou 510640)
Polysiloxane latexes are prepared by the polymerization of octamethylcyclotetrasiloxane (D4) in a non-pulsed microwave reactor, with ionic and nonionic emulsifier and dodecylbenzene sulphonic acid (DBSA) as a catalyzer. Compared with conventional heating, the polymerization rate and equilibrium conversion of D4 are both enhanced. The particle sizes of polysiloxane and crosslinked polysiloxane latex prepared by the two processes are measured by a Submicron Particle Size Analyzer and transmission electron microscopy. The results indicate that the average particle size of latex, after microwave irradiation, is smaller and the particle distribution is narrower than conventionally heated samples. The effect of microwave power on the latex size and conversion is also investigated. Low energy consumption is also characteristic of the microwave polymerization process.
【CateGory Index】： O634.41