Abstract
13C NMR spectra (75.5 MHz) of methyl methacrylate (M)-lauryl methacrylate (L) copolymers prepared by group transfer polymerization (GTP) were analyzed for sequence distribution and relative stereochemical configuration of monomer units along the macromolecular chains. The concentrations of M- and L-centered triads, determined experimentally from α-CH3 and C=O resonance signals, were in good agreement with those calculated statistically, taking into consideration the terminal copolymerization model and Bernoullian distribution of stereoregularity, with the statistical parameters Pij determined from the reactivity ratios rM=1.38±0.11 and rL=0.68±0.10 and the coisotacticity parameters σMM=0.24, σLL=0.27, σML=σLM=σ*=0.30.
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Sannigrahi, B., Garnaik, B. Microstructural Analysis of Methyl Methacrylate-Lauryl Methacrylate Copolymers Using 13C NMR Spectroscopy. Polym J 30, 340–344 (1998). https://doi.org/10.1295/polymj.30.340
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DOI: https://doi.org/10.1295/polymj.30.340