ISSN:
0025-116X
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
Results of studies on the determination of the initiation rate of the copolymerization reaction of acrylonitrile with methyl methacrylate, initiated by 2,2′-azoisobutyronitrile in N,N-dimethylformamide at 60°C are reported. The inhibition method used was that involving the stable Banfield's radical (N-[1,1-dimethyl-3-(N-oxidophenyliminio)butyl]-N-phenylaminyl oxide).In the case of acrylonitrile an effect of a side reaction of initiation with the stable radical was observed along with a retarding effect due to inhibition reaction products.In the homopolymerization of methyl methacrylate there takes place a slight effect from a side initiation reaction due to the Banfield's radical, the inhibition reaction products not influencing the further course of the polymerization reaction.The overall contribution of the side initiation reaction changes in the copolymerization of acrylonitrile with methyl methacrylate for different comonomer mixtures with their composition, the actual changes being non-additive. The initiation rate depends on the composition of the monomer mixtures and may be described by the following relation: \documentclass{article}\pagestyle{empty}\begin{document}$ R_i = R_{i,{\rm AN}} \cdot X_{{\rm AN}}^{0,66} + R_{{\rm i,MM}} \cdot X_{{\rm MM}}^{{\rm 1,30}}, $\end{document} where Ri, AN=(8,20±0,15).10-7 mol.dm-3.s-1 and Ri, MM=(7,75±0,25).10-7 mol.dm-3.s-1.
Additional Material:
6 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/macp.1978.021791114
Permalink
