Portal de Periódicos da CAPES

Etude de la télomérisation et de la cotélomérisation du fluorure de vinylidéne (VF2). Part I. Cotélomérisation du VF2 avec l'acétate de vinyle et le 2-hydroxyéthylmercaptan

1994; Elsevier BV; Volume: 69; Issue: 1 Linguagem: Inglês

10.1016/0022-1139(93)03054-p

1873-3328

Bernard Boutevin, Yves Furet, Yves Hervaud, Gérard Rigal,

Fluorine in Organic Chemistry

The radical telomerization of vinylidene fluoride (VF2) and of vinyl acetate (VAc) with 2-hydroxyethylmercaptan, and the radical cotelomerization of both monomers with the same thiol have been investigated. In each case, the chemical structures and the chain lengths have been determined by various methods in order to understand the reactivity and the direction of addition of both monomers. This study indicates a greater reactivity for VAc relative to VF2 since a twofold excess of VAc may be introduced into the cotelomers for an equimolar initial feed concentration of the monomers. Of the telomers produced, it was noted that the diadduct is HOCH2CH2SCH2CF2CH2CH2OCOCH3, indicating that the thiyle radical reacts preferentially with VF2. This study is a preliminary to obtaining curable VF2 oligomers.