ISSN:
0022-3832
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
The reactivity ratios (r1 and r2) of sodium styrenesulfonate (M1) with different monomers in aqueous solution were determined by the usual procedures of copolymerization to low conversion followed by isolation and analysis of the copolymer. The values of r1 and r2, respectively, for the monomers (M2) studied were found to be: acrylonitrile, 1.5, 0.05; acrylic acid, 1.0, 0.10; and sodium acrylate, 2.3, 0.34. The substitution of the sodium salt for the potassium salt of styrenesulfonic acid did not alter the reactivity of the monomer. The Q and e values determined for sodium styrenesulfonate in aqueous solution are 2.0 and -0.4, respectively. The values previously published for potassium styrenesulfonate in dimethylformamide solution, 9.18 and 1.32, respectively, indicate that the styrenesulfonic acid is a highly reactive monomer containing a vinyl group with a polarity strongly positive with respect to styrene. However, the Q and e values presented here denote a reactive monomer with the vinyl group polarized only slightly more positive than styrene. The consequences of these differences are shown in the prediction of copolymer compositions.
Additional Material:
4 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/pol.1962.1205916818
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