Abstract
High resolution 1H-NMR spectra of 2-hydroxyethyl methacrylate (HEMA)-styrene (S) copolymers prepared at low conversion by free radical copolymerization in N,N-dimethylformamide (DMF) solution at 50°C, have been analyzed in terms of sequence distribution and stereoregularity. The Bootstrap effect for the HEMA/S/DMF system was confirmed by comparison of the data obtained with those previously reported for the HEMA/S/bulk system. Reactivity ratios, statistical parameters, and the coisotacticity parameter σHS = 0.40, estimated at low conversion, were used to describe the observed experimental changes in copolymer composition and triad fraction intensities over a wide range of conversions.
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