Plasma Initiated Emulion Polymerization of MMA

摘要

A study was made on plasma-initiated emulsion polymerization and kind of ultrahigh molecular weight poly(methyl methacrylate) (PMMA) was obtaiend. The viscosity-averaged molecualr weight M_η of this PMMA is over 1×10~7 in the measuremetn of viscosity by using Butanone as solvent. Its glass transition temeprature T_g and flow temeprature T_f measured by DSC are 132.8 deg C and 299.2 deg C respectively. The effects of reaction duration, radiaiton power and polymerization temperautre on the conversion and the molecular weight of the products were also investigated. The results of these studies suggest that by way of initiated polymerization, the molecualr weight of polymer are greatly enhanced.