Study On Microwave Radiation Polymerization And Thermal Polymerization Of N-[(n-Butonycarbonyl) Ethyl] Maleimide Microemulsion

By using maleic anhydride, alanine and aliphatic alcohol as raw materials, N-substituted maleimides were prepared. Appropriate solvents and catalyst were selected, and the better reaction conditions were determined. With potassium persulfate as an initiator, the microemulsion of N-[(n-butonycarbonyl)ethyl] maleimide was polymerized by water bath and microwave radiation respectively. The effect of temperature, initiator concentration, monomer concentration and emulsifier concentration were investigated. The polymerization kinetics and the polymerization mechanism were discussed.The structure and property of polymer were measured by PERKIN-ELMER FTIR-1710, 200 Varian NMR instrument, ERKIN ELMER DSC7 Differential Scanning Calorimeter, DT-40 differential thermal analysis, PE-2400 element analytical instrument.It was indicated that the microwave has the ability to initiate the reaction, which kinetics basically agree with the theory of conventional emulsion polymerization. The glass transition temperature was 175℃. The structures of both kinds of polymers were the same by infra-red analysis, nuclear magnetic resonance technology(lH-NMR) and Elemental analysis. The results of differential thermal analysis manifested that both polymers had higher thermal decomposition temperature (275℃ and 275.4℃), so the thermal stability of the polymer was fine.