A new effecient catalyst system(FeCl 3/2PPh 3) for the “living”/controlled radical polymerization of butyl methacrylate by a reverse ATRP process was reported in this paper.With the presence of this catalyst system,...A new effecient catalyst system(FeCl 3/2PPh 3) for the “living”/controlled radical polymerization of butyl methacrylate by a reverse ATRP process was reported in this paper.With the presence of this catalyst system,the number average molecular weights of the obtained polymer increased in direct proportion with monomer conversion,and the MWDs (molecular weight disctributions) were narrow throughout the reactions(1 17< w/ n<1 22).This reaction system did not include the conventional initiators which were used to generate the primary radicals.展开更多
The atom transfer radical polymerization of butyl methacrylate (BMA) under microwave irradiation (MI) was successfully carried out, using (1-Chloroethyl) benzene as initiator and CuCl/2,2′-bipyridine as catalyst. The...The atom transfer radical polymerization of butyl methacrylate (BMA) under microwave irradiation (MI) was successfully carried out, using (1-Chloroethyl) benzene as initiator and CuCl/2,2′-bipyridine as catalyst. The results showed that microwave could apparently accelerate the rate of polymerization, under the same experimental conditions; the apparent polymerization rate (kpapp) was 34 times under microwave irradiation than that under conventional heating. In addition, the effects of the concentration of initiator and catalyst and the solvent were studied. Poly (butyl methacrylate) with narrow polydispersity and anticipated molecular weight was obtained.展开更多
文摘A new effecient catalyst system(FeCl 3/2PPh 3) for the “living”/controlled radical polymerization of butyl methacrylate by a reverse ATRP process was reported in this paper.With the presence of this catalyst system,the number average molecular weights of the obtained polymer increased in direct proportion with monomer conversion,and the MWDs (molecular weight disctributions) were narrow throughout the reactions(1 17< w/ n<1 22).This reaction system did not include the conventional initiators which were used to generate the primary radicals.
文摘The atom transfer radical polymerization of butyl methacrylate (BMA) under microwave irradiation (MI) was successfully carried out, using (1-Chloroethyl) benzene as initiator and CuCl/2,2′-bipyridine as catalyst. The results showed that microwave could apparently accelerate the rate of polymerization, under the same experimental conditions; the apparent polymerization rate (kpapp) was 34 times under microwave irradiation than that under conventional heating. In addition, the effects of the concentration of initiator and catalyst and the solvent were studied. Poly (butyl methacrylate) with narrow polydispersity and anticipated molecular weight was obtained.
