New fluorinated polymers bearing pendant phosphonic groups for fuel cell membranes: Part 1 synthesis and characterizations of the fluorinated polymeric backbone

Synthesis of methallylic monomers bearing ammonium side‐groups and their radical copolymerization with chlorotrifluoroethylene

“…The last signal confirms the work of Tiers and Bovey, since they are assigned to the central ‐CF 2 ‐ group in the [‐CF 2 CFCl‐CF 2 CFCl] dyad. The comparison with the 19 F NMR spectrum of poly(CTFE‐ alt −2‐chloroethylvinyl ether), indicates that the signal at −108 ppm is characteristic of the ‐CF 2 ‐ in the alternating dyad of CTFE with M1 monomer. Thus, the copolymers of CTFE with M1 monomer are not strictly alternating and contain some CTFE‐CTFE dyads.…”

Synthesis and characterisation of novel fluorinated polymers bearing pendant imidazole groups and blend membranes: New materials for PEMFC operating at low relative humidity

“…Experimental conditions for preparation of this polymer, and its characterisation, have been recently described [26,27]. Poly(CEVEalt-CTFE) copolymer was subsequently reacted with 1-benzyl-2-(hydroxymethyl)imidazole.…”

“…The poly(CEVE-alt-CTFE) copolymer synthesised by radical copolymerisation [26,27] was recovered with a mass yield of 75%, and molecular weight and polydispersity index (PDI) of 25 000 g mol −1 and 2.8, respectively. The glass transition temperature (T g ) of the copolymer was observed at 27 • C, and thermogravimetric analysis recorded in air showed a T d,5% (temperature corresponding to 5% decomposition) at ca.…”

Grafting of phosphonate groups onto PVA by acetalyzation. Evaluation of the anti-corrosive properties for the acetalyzed PVA coatings

“…nucleophilic substitution of halogen atom, is a well-known reaction and usually proceeds quantitatively. [48] Deprotection of dioxolane group was then carried out at 40°C and after 4 h of reaction about 80% was converted into Scheme 1. Two-steps synthesis of (3-phosphonic acid)propanal.…”