Plasma Initiated Emulsion Polymerization of MMA

摘要

A study was made on plasma-initiated emulsion polymerization and kind of ultrahigh moleuclar wieght poly (methodl methacrylate) (PMMA) was obtained. The viscosity-averaged molecular weight M_η of this PMMA is over 1×10~7 in the measurement 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, radiation power and polymerization tmeperautre on the conversion and the molecualr weight of the products were also investigated. The resutls of these studies suggest that by way of initiated polymerization, the molecular weight of polymer are greatly enhanced.