The Bulk Atom Transfer Radical Polymerization (ATRP)of MMA Under Microwave Irradiation

In this paper .Microwave irradiation was first applied in Atom TransferRadical Polymerization (ATRP) . The state of constant temperature was controlled by the refluxing of solvent. The bulk ATRP of MMA was studied under microwave irradiation at constant temperature and constant power. Tetraphenylporphyrin and copper phthalocyanine which are probably to be the ligand of ATRP was synthesized and tried to be applied in ATRP. They were identified and analyzed by 'HNMR, Elemental analysis, x-ray powder diffraction, ICP. In the synthesis of copper phthalocyanine, microwave irradiation has been used. The influence of the irradiation reaction time , the quantities of urea and copper chloride and the different catalysts to the productivity of copper phthalocyanine were investigated. Under the selected same ratio of reactants , compared the conventional heating method with the microwave method ,the productivity got by microwave methodwas higher than that got by conventional heating means (200) , and the reaction time wasalso fewer. Conformation from x-ray powder diffraction ,the products got by the two methods were mainly of P type. In the study of ATRP under microwave irradiation, the conversion of polymer was determined gravimetrcally. Molecular weight and molecular weight distribution were measured by GPC. The influence on the conversion , molecular weight and molecular weight distribution of the polymer by the quantities of the solvent for controlling temperature , irradiation power, irradiation time, irradiation energy, initiator concentration and other various initiator system were investigated. The kinetic data of ATRP in different polymerization conditions was calculated and discussed. At the same time it was compared with that of thermal method under comparable reaction conditions. It has been found that the reaction rate of ATRP was obviously enhanced by microwave irradiation, and molecular weight and molecular weight distribution of the polymer gotten by microwave method were quite different from that gotten by thermal method.