Vinylbenzylphosphonic acid

The first PA monomers to be included in dental materials were vinylphos-phonic acid (VPA) and 4-vinylbenzylphosphonic acid (VBPA). Anbar et al. demonstrated that the incorporation of VBPA in a dental composite resulted in an increase of the bonding strength of the material to enamel. Moreover, the precoating of enamel by VPA and VBPA led to enhanced adhesion. 

Scheme 13.1 Selected phosphonated non-aromatic hydrocarhon pofymers (a) PVPA/ (b) poly(vinylbenzylphosphonic acid)/ (c) poly(vinylben2yl-phosphonic acid-co-4-vinylpyridine), (d) poly(VPA-co-s ene), (e) poly(VPA-co-l-vinyl-l, 2,4-triazole),(f) pofy(VPA-co-4-vtnylimidazole), (g) poly(VPA-co-methyl acrylate), and (h) poly(aiylo3q phosphazene). ...

Diethyl vinylbenzylphosphonate has been homopolymerised via atom transfer radical polymerization (ATRP) to obtain poly(diethyl vinylbenzylphosphonate), which was hydrolyzed to obtain the acid derivative (Scheme 13.Ib). The proton conductivity of poly(vinylbenzylphosphonic acid) was measured both at dry conditions between 20 and 160 °C and in an atmosphere with a defined RH. Under dry conditions, the polymer exhibited a proton conductivity with a linear dependence on temperature, and reached... 

Scheme 13.4 Phosphonated block and graft copolymers (a) poly(VPA-i)-styr-ene)/ (b) poly(phenylene oxide-fr-vinylbenzylphosphonic acid), (c) PAES-g-PVPA/ and (d) PAES-g-poly(2,3,5,6-tetrafluoro-4-vinylphe-...

Chang GC, Kim SH, Park YC, Kim H, J.-W P (2008) Fuel cell membranes based on blends of PPO with poly(styrene -b- vinylbenzylphosphonic acid) copolymers . J. Membr. Sci. 308 96. 

M /g.mor = 34100, 16.9 mol% vinylbenzylphosphonic acid diethylester, gradient copol5mier, S5mthesized in the laboratory carbon dioxide CO2 124-38-9... 

Poly [ 1 -(4-vinylbenzyl)-3 -methylimidazolium tetrafluoroborate] Poly [ 1 -(4-vinylbenzyl)-4-methylimidazolium tetrafluoroborate] Poly(vinylbenzylphosphonic acid diethylester) Poly(vinylbenzylphosphonic acid diethylester-6-... 

Poly(vinylbenzylphosphonic acid diethylester) carbon dioxide HPPE 296... 

Poly(vinylbenzylphosphonic acid diethylester-6-1,1,2,2-tetrahydro-perfluorodecyl acrylate) carbon dioxide HPPE 296-297... 

Statistical copolymers from diisopropyl p-vinylbenzylphosphonate and 4-vinylpyridine were prepared via ATRP. The resulting copolymers were hydrolyzed to obtain acid derivatives (Scheme 13.1c). The proton conductivity of a copolymer containing 90 mol% 4-vinylpyridine was investigated at 25 °C under varying RH. The proton conductivity rose by several orders of magnitude with increasing water content. At 60% RH, the proton conductivity reached 10 mS cm at 25 °C. 

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