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A study of sequence distribution of chloroprene and methyl methacrylate copolymers by 1 H‐NMR
Author(s) -
Okada Tadashi,
Otsuru Masaaki
Publication year - 1979
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.1979.070230731
Subject(s) - chloroprene , copolymer , methyl methacrylate , tacticity , polymer chemistry , methacrylate , nmr spectra database , materials science , proton nmr , spectral line , chemistry , organic chemistry , polymer , physics , polymerization , natural rubber , astronomy
The 1 H‐NMR spectra of poly(chloroprene‐methyl methacrylate) which was copolymerized with ethylaluminum dichloride (EtAlCl 2 ) and vanadyl trichloride (VOCl 3 ) were measured with the radical copolymers. The split signals of the OCH 3 and α‐CH 3 protons in the spectra were assigned to triads and pentads with methyl methacrylate as a center, respectively, and the fomer concentrations were in reasonable agreement with the latter concentrations in triads. Moreover, it was found that the α‐CH 3 signal was split into peaks of different tacticity when the mole fractional ratio of methyl methacrylate (MMA) to chloroprene (CP) in the copolymer was approximately 3.0 or greater.