New N,N-amino-diphosphonate-containing methacrylic derivatives, their syntheses and radical copolymerizations with MMA

In situsynthesis of a novel transparent poly (methyl methacrylate) resin with markedly enhanced flame retardancy

“…Moreover, the chemical shifts of protons in P-CH 2 -O is shifted from 4.02-4.34 ppm to 4.82-5.0 ppm because of the withdrawing effect of carbonyl group in acrylate structure. [22] Figure 1b and d show 31 P NMR spectra of DOPO-OH and DOPO-AA, respectively. It is evident that the DOPO-OH spectrum exhibits a single peak at 33.5 ppm.…”

Effective dentin restorative material based on phosphate-terminated dendrimer as artificial protein

“…After that, G4-PO(OCH 3 ) 2 dendrimer was obtained based on the Kabachnic-Fields reaction and then hydrolyzed by bromotrimethylsilane [35,36]. The final product is phosphate-terminated G4 PAMAM dendrimer (G4-PO 3 H 2 ).…”

“…Dimethyl hydrogenophosphonate (2.064 g, 18.760 mmol) was added in a dropwise manner. After that, the mixture was allowed to react at 70 • C with vigorous stirring for 14 h [35]. The product solution was evaporated to remove the excess organic solvent, then diluted with deionized water and transferred to a dialysis tube (MWCO 3500) and dialyzed against deionized water for 1 day.…”

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

“…From 31 P NMR, a main peak was observed at 33.5 ppm that can be attributed to the phosphonate group of the resulting PVAP. A peak of very low intensity was also observed at 27.5 ppm, ascribed to partial hydrolysis of phosphonate groups into phosphonic acid groups [17]. The 1 H NMR spectrum of purified PVAP4, i.e.…”

“…Investigation of electrochemical impedance for these coatings revealed a R t resistance higher than 244 kX cm À2 , compared to untreated steel showing a R t value of 55 kX cm À2 . Recently, Chougrani et al proposed new methacrylate coatings based on bis-phosphonic methacrylates [17,18]. This new series of methacrylate monomers was incorporated in a UV acrylate formulation (3 wt.%) and the authors observed a resistance to corrosion, by salt spray test, depending on the bis-phosphonic methacrylate monomer structure.…”