Using of Novel Halides in the ATRP Polymerization. Estimation of Polymer Molecular Mass

摘要

Summary: Two novel ATRP initiator (R-X): 2-bromo-2-methyl-N-(1-phenyl-ethyl) propanamide (I) and 2,2,2-trichloro-N-(1-phenylethyl)acetamide (II) were synthesized and characterized by ~1H-NMR, IR, EI. Also, crystal structures of (I) and (II) are reported. Compounds (I) and (II) were used in the ATRP reaction of methyl methacrylate (MMA) and acrylamide (AAD) at 48℃, using CuBr/Me_6TREN and ethanol/toluene (60:40) mixture as catalytic complex and solvent, respectively. End-group analysis by ~1H-NMR was used to determinate the molecular mass of the polymers synthesized via ATRP. The M_n values for poly(MMA) using (II) were 2333 and 3952 g/mol, which is higher in comparison with the M_n values obatined for (AAD)/(II) and (AAD)/(I) systems indicating that monomers containing ester moiety in their structure, such as acrylates and methacrylates, may be good candidates to polymerize with (II) and CuBr/Me_6TREN.