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Copolymer composition as a function of molecular weight and the effect of conversion on this relationship
Author(s) -
Mirabella Francis M.,
Barrall Edward M.,
Jordan Edmund F.,
Johnson Julian F.
Publication year - 1976
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.1976.070200302
Subject(s) - copolymer , composition (language) , gel permeation chromatography , reactivity (psychology) , styrene , polymer chemistry , materials science , infrared spectroscopy , chemistry , chemical engineering , organic chemistry , polymer , composite material , medicine , philosophy , linguistics , alternative medicine , pathology , engineering
The copolymer compositions as a function of molecular weight for three poly(styrene‐co‐vinyl stearate) copolymers of widely varying conversion were determined. A combined gel permeation chromatography–infrared spectroscopy method was used. Theoretical changes in copolymer composition were calculated using reactivity ratios. Comparison of the calculated and observed changes in copolymer composition as a function of molecular weight showed qualitative agreement. However, the observed changes in composition were significantly larger than those calculated.

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