Abstract
It has been found that the hexaearbonyls of group VI metals in the presence of some organic halogen compounds are active initiators of vinyl polymerization. Molybdenum hexacarbonyl is the most active, and halogen compounds containing —CC1
3
, —CBr
3
are generally more effective than those with fewer halogen atoms joined to a single carbon. Fluorine and iodine compounds are inactive. A study has been made of the initiation of the polymerization of methyl methacrylate by the Cr(CO)
6
+ CCl
4
system. The polymerization is markedly retarded by carbon monoxide. It is shown that the reaction proceeds through free-radical intermediates, and a kinetic mechanism for initiation is derived (equation (4)) leading to the expression (5) for the rate of chain starting. This quantity may be calculated from (5) with the aid of the numerical values in table 3. Kinetic observations are in satisfactory agreement with this mechanism. The nature of the participating reactions is discussed.
Reference19 articles.
1. Bam ford C. H . B arb W . G. Jenkins A. D. & Onyon P . F . 1958 kinetics of vinyl polymerization by radical mechanisms chapters 4 6. London: B u tterw o rth s Scientific P ublications.
2. Proc. Boy;Jenkins A. D.;Soc. A,1957
3. Trans;Jenkins A. D.;Faraday Soc.,1959
4. Trans;Faraday Soc.,1956
5. Metal Carbonyls. I. Carbon Monoxide Exchange with Nickel Tetracarbonyl and Dicobalt Octacarbonyl1,2
Cited by
42 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献
1. Macromolecular design and application using Mn2(CO)10-based visible light photoinitiating systems;Polymer International;2016-04-19
2. A new technique for polymer grafting;Journal of Polymer Science Part C: Polymer Symposia;2007-03-08
3. Some Novel Initiators of Vinyl Polymerization;Journal of Polymer Science Part C: Polymer Symposia;2007-03-07
4. Metal complexes in controlled radical polymerization;Acta Polymerica;1997-05
5. Redox Initiators;Comprehensive Polymer Science and Supplements;1989