ISSN:
0022-3832
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
In vinyl polymerization retarded by aromatic nitro compounds, the growing chain reacts with the retarder to form stabilized products. The locus of radical attack has been reported as taking place at an aromatic carbon or at a nitro-group oxygen. A direct experimental test has been devised to permit a choice between these alternatives. Rates of racemization of optically active nitrobiphenyl derivatives used as retarders in polymerizing systems have been compared with rates in nonpolymerizing monomer. These compounds were found to racemize more rapidly in the presence of polymerizing methyl methacrylate or vinyl acetate. Benzoyl peroxide initiator was not responsible for the considerable difference in racemization rate. The results support the view that primary attack of the growing chain is upon the nitro group and not at an aromatic carbon atom.
Additional Material:
1 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/pol.1958.1203312642
