title: Poly(vinylidene fluoride) Containing Phosphonic Acid as Anticorrosion Coating for Steel.
abstract: Vinylidene fluoride (VDF)-based copolymers bearing pendant phosphonic acid function for potential application as anticorrosion coatings were synthesized via free radical copolymerization of VDF with a new phosphorus containing 2-trifluoromethacrylate monomer, (dimethoxyphosphoryl)methyl 2-(trifluoromethyl)acrylate (MAF-DMP). MAF-DMP was prepared from 2-trifluoromethacrylic acid in 60% overall yield. Radical copolymerizations of VDF with MAF-DMP initiated by tert-amyl peroxy-2-ethylhexanoate at varying ([VDF]0/[MAF-DMP]0) feed ratios led to several poly(VDF-co-MAF-DMP) copolymers having different molar percentages of VDF (79-96%) and number-average molecular weights (Mn's) up to ca. 10 000 g mol-1in fair yields (47-53%). Determination of the composition and microstructure of all the synthesized copolymers was done by1H and19F NMR spectroscopies. The monomer reactivity ratios of this new VDF/MAF-DMP pair were also determined (rVDF= 0.76 ± 0.34 and rMAF-DMP= 0 at 74 °C). The resulting poly(VDF-co-MAF-DMP) copolymers exhibited high melting temperature (162-171 °C, with respect to the VDF content), and the degree of crystallinity reached up to 51%. Finally, the pendant dimethyl phosphonate ester groups of the synthesized poly(VDF-co-MAF-DMP) copolymer were quantitatively hydrolyzed, giving rise to novel phosphonic acid-functionalized PVDF (PVDF-PA). In comparison to hydrophobic poly(VDF-co-MAF-DMP) copolymers (the water contact angle, WCA, was 98°), the hydrophilic character of the PVDF-PA was found to be surprisingly rather pronounced, exhibiting low WCA (15°). Finally, steel plates coated with PVDF-PA displayed satisfactory anticorrosion properties under simulated seawater environment.
authors.affiliation: Ingénierie et Architectures Macromoléculaires Team, Institut Charles Gerhardt, UMR 5253 CNRS, UM, ENSCM , Place Eugène Bataillon, 34095 Montpellier Cedex 5, France.
authors.forename: Sanjib
authors.identifier: http://orcid.org/0000-0003-4841-4408
authors.initials: S
authors.lastname: Banerjee
authors.affiliation: Ingénierie et Architectures Macromoléculaires Team, Institut Charles Gerhardt, UMR 5253 CNRS, UM, ENSCM , Place Eugène Bataillon, 34095 Montpellier Cedex 5, France.|Chimie Moleculaire et Organisation du Solide Team, Institut Charles Gerhardt, UMR 5253 CNRS, UM, ENSCM , Place Eugène Bataillon, 34095 Montpellier Cedex 05, France.|Department of Chemistry and Biochemistry, Faculty of Sciences 1, Lebanese University, Rafic Hariri University , Campus - Hadas, Beirut, Lebanon.
authors.forename: Mohammad
authors.initials: M
authors.lastname: Wehbi
authors.affiliation: Ingénierie et Architectures Macromoléculaires Team, Institut Charles Gerhardt, UMR 5253 CNRS, UM, ENSCM , Place Eugène Bataillon, 34095 Montpellier Cedex 5, France.
authors.forename: Abdellatif
authors.initials: A
authors.lastname: Manseri
authors.affiliation: Chimie Moleculaire et Organisation du Solide Team, Institut Charles Gerhardt, UMR 5253 CNRS, UM, ENSCM , Place Eugène Bataillon, 34095 Montpellier Cedex 05, France.
authors.forename: Ahmad
authors.initials: A
authors.lastname: Mehdi
authors.affiliation: Department of Chemistry and Biochemistry, Faculty of Sciences 1, Lebanese University, Rafic Hariri University , Campus - Hadas, Beirut, Lebanon.
authors.forename: Ali
authors.initials: A
authors.lastname: Alaaeddine
authors.affiliation: Department of Chemistry and Biochemistry, Faculty of Sciences 1, Lebanese University, Rafic Hariri University , Campus - Hadas, Beirut, Lebanon.
authors.forename: Ali
authors.initials: A
authors.lastname: Hachem
authors.affiliation: Ingénierie et Architectures Macromoléculaires Team, Institut Charles Gerhardt, UMR 5253 CNRS, UM, ENSCM , Place Eugène Bataillon, 34095 Montpellier Cedex 5, France.
authors.forename: Bruno
authors.identifier: http://orcid.org/0000-0003-4217-6664
authors.initials: B
authors.lastname: Ameduri
keywords: adhesion; anticorrosion; coating; phoshonic acid; poly(vinylidene fluoride); radical polymerization; reactivity ratio