Title of article :
Atom transfer radical polymerization of methyl methacrylate with low concentration of initiating system under microwave irradiation
Cheng، نويسنده , , Zhenping and Zhu، نويسنده , , Xiulin and Chen، نويسنده , , Ming and Chen، نويسنده , , Jianying and Zhang، نويسنده , , Lifen، نويسنده ,
Issue Information :
دوهفته نامه با شماره پیاپی سال 2003
Homogeneous atom transfer radical polymerization of methyl methacrylate (MMA) under microwave irradiation (MI) with low concentration of initiating system [ethyl 2-bromobutyrate (EBB)/CuCl/N,N,N′,N″,N″-pentamethyldiethylenetriamine (PMDETA)] was successfully carried out in N,N-dimethylformamide (DMF) at 69 °C. Plots of ln ([M]0/[M]) vs. time and molecular weight evolution vs. conversion showed a linear dependence. A 27.3% conversion for a polymer with number-average molecular weight (Mn) of 57,280 and a polydispersity index (PDI) of 1.19, was obtained under MI (360 W) with the ratio of [MMA]0/[EBB]0/[CuCl]0/[PMDETA]0=2400/1/2/2 in only 150 min; but 963 min was needed under conventional heating (CH) process to reach a 26.0 % conversion (Mn=63,990 and PDI=1.14) under identical polymerization conditions, indicating a significant enhancement of the polymerization rate under MI.
Atom transfer radical polymerization (ATRP) , microwave , Irradiation