NEW FLUORINATED POLYMERS BEARING PENDANT PHOSPHONIC GROUPS FOR FUEL CELL MEMBRANES. PART 1 SYNTHESIS AND CHARACTERIZATIONS OF THE FLUORINATED POLYMERIC BACKBONE

Russell Tayouo (1) , Ghislain David (1) , B. Ameduri (1)

1 ICGM ICMMM - Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier

Radical copolymerizations of chlorotrifluoroethylene (CTFE) with vinyl ethers such as 2-chloroethyl vinyl ether (CEVE) and ethyl vinyl ether (EVE) were performed at 75 °C in the presence of peroxide initiator (TBPPi). Three copolymers were obtained and characterized by means of NMR and elemental analysis. Then, the chlorine atoms in the side chains were converted by nucleophilic substitution into iodine atoms, which was monitored by 1H NMR spectroscopy. A series of five copolymers with differents amounts of iodine atoms in the side chains were thus obtained. These copolymers exhibited molecular values of about 25 000 g/mol, and the thermal analysis of the copolymers showed a starting degradation from about 220 °C. The Tg values were in the range of 34 to 41 °C and showed a linear dependance towards the content of iodine atoms.

Mots clés: Radical copolymerization; fuel cell; thermal stability; fluorocopolymers; iodine; NMR

Domaines: Polymères

Russell Tayouo, Ghislain David, B. Ameduri. NEW FLUORINATED POLYMERS BEARING PENDANT PHOSPHONIC GROUPS FOR FUEL CELL MEMBRANES. PART 1 SYNTHESIS AND CHARACTERIZATIONS OF THE FLUORINATED POLYMERIC BACKBONE. European Polymer Journal, 2010, 46, pp.1111-1118. ⟨10.1016/j.eurpolymj.2010.01.011⟩. ⟨hal-00447391⟩