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|All Authors / Contributors:||
Régis Mondière; Charles Mioskowski; Université de Paris-Sud. Faculté des Sciences d'Orsay (Essonne).
|Description:||206 p. : ill. ; 30 cm.|
|Responsibility:||Régis Mondière ; sous la dir. de Charles Mioskowski.|
My Ph.D. work consisted in the generalization and optimization of a new polymerization reaction involving allylic arsonium ylide and catalytic amounts of various boron compounds. Thus, various beta-substituted allylic arsonium salts were produced according to synthetic strategies that depended on the nature of the functional group beared by the salt. These salts were converted in situ to the corresponding arsonium ylides which were the treated with boron compounds to yield polymers. Our new method of polymerization afforded either non conjugated polyenes that are functionalized every three atoms of carbo or statistic copolymers, depending on the nature of the groupement R beared on the beta position of the ylide. These new polymers cannot be synthesized by usual methods of polymerization. Initial molar ratios of reactants were found to give molar mass control of the synthesized polymers. This controlled polymerization allowed us to produce several bloc copolymers. All the polymers were characterized by NMR techniques, by size exclusion chromatography and, for some of them, by mass spectrometry (MALDI-TOF). Investigation of their physico-chemical properties will need additional experiments.