Reactivity ratios and microstructure of vinyl acetate–butyl methacrylate copolymers: NMR study | Zendy

Brar A. S. | Zendy; Charan Shiv | Zendy

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Reactivity ratios and microstructure of vinyl acetate–butyl methacrylate copolymers: NMR study

Author(s) -

Brar A. S.,

Charan Shiv

Publication year - 1994

Publication title -

journal of applied polymer science

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.575

H-Index - 166

eISSN - 1097-4628

pISSN - 0021-8995

DOI - 10.1002/app.1994.070510411

Subject(s) - comonomer , copolymer , reactivity (psychology) , vinyl acetate , polymer chemistry , nuclear magnetic resonance spectroscopy , nmr spectra database , materials science , triad (sociology) , proton nmr , methacrylate , methyl methacrylate , spectroscopy , microstructure , polymerization , chemistry , crystallography , spectral line , organic chemistry , polymer , physics , medicine , psychology , alternative medicine , pathology , astronomy , psychoanalysis , quantum mechanics

Vinyl acetate/butyl methacrylate (V/B) copolymers were prepared by free‐radical solution polymerization in benzene. Compositions of the copolymers have been obtained from 1 H‐NMR spectroscopy. Kelen–Tüdös (KT), the nonlinear error in variables method (EVM), and 13 C{ 1 H}‐NMR spectra of the copolymers were utilized to calculate the comonomer reactivity ratios. The reactivity from different methods are r V = 0.06 ± 0.02, r B = 26.34 ± 8.49 (KT); r V = 0.06 ± 0.01, r B = 26.88 ± 3.59 (EVM); and r V = 0.06, r B = 18.20 ( 13 C‐NMR spectroscopy). The microstructure in terms of V‐ and B‐centered triad fractions was obtained using 13 C{ 1 H}‐NMR spectra of copolymers. The copolymerization behavior of V/B copolymers as a function of conversion was also studied. © 1994 John Wiley & Sons, Inc.

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