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Investigation of the sequence distribution of bulk and emulsion styrene–acrylic acid copolymers by 1 H‐ and 13 C‐NMR
Author(s) -
Wang Shouting,
Poehlein Gary W.
Publication year - 1993
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.1993.070490605
Subject(s) - copolymer , triad (sociology) , sequence (biology) , styrene , reactivity (psychology) , polymer chemistry , emulsion , acrylic acid , homogeneous , materials science , carbon 13 nmr , chemistry , organic chemistry , thermodynamics , physics , polymer , composite material , medicine , psychology , biochemistry , alternative medicine , pathology , psychoanalysis
The sequence distribution of homogeneous styrene (S)–acrylic acid (A) copolymers, obtained by low conversion (<10%) bulk copolymerization, has been studied by 1 H‐ and 13 C‐NMR. The reactivity ratios r a and r s were determined by the Kelen–Tudos method. The sequence distributions at the triad level were assigned and verified by Alfrey–Mayo kinetics. The sequence distributions of emulsion copolymers formed at different reaction conversions were investigated and compared with the results obtained from bulk copolymers. © 1993 John Wiley & Sons, Inc.