Abstract
13C n.m.r. spectra (75 MHz) of ethyl acrylate (A)-methyl methacrylate (M) copolymers prepared by free radical polymerization at 50°C, were analysed in terms of sequence distribution and stereoregularity of monomer units along the macromolecular chains. Ethyl acrylate and methyl methacrylate centred triad molar fractions were determined from the α-CH 3, quaternary carbon and carbonyl group, resonance signals. The experimental sequence concentrations were in fairly good agreement with the values calculated from the terminal copolymerization model and Bernoullian statistics, with the statistical parameters P ij determined from the reactivity ratios and the feed composition and the coisotacticity parameters σ MM = 0.24, σ AA = 0.31, σ MA = σ AM = σ∗ = 0.41 .
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
