Compositional assignments of methyl methacrylate-vinylidenechloride copolymers by two dimensional NMR spectroscopy

The compositional assignments of methyl methacrylate-vinylidene chloride copolymers prepared by the photopolymerization process was studied by H-1, (NMR)-N-13, H-1-C-13 heteronuclear shift correlation NMR (HSQC) and by double quantum filtered homonuclear shift correlated spectroscopy (DQF COSY). A C-13 distortionless enhancement by polarization transfer (DEPT) spectrum was used to differentiate between the resonance signals of methoxy and the methylene units. Assignments to the methylene regions have been done up to the tetrad levels using 2D HSQC experiments. The geminal couplings ill the methylene proton region is evident from the 2D-COSY experiments. (C) 1999 Elsevier Science Ltd. All rights reserved.