Adsorption of Poly(vinylformamide-co-vinylamine) Polymers (PVFA-co-PVAm) on Copper

Abstract

The adsorption of poly(vinylformamide) (PVFA) and its derivative statistical copolymer poly(vinyl-formamide-co-vinylamine) (PVFA-co-PVAm) on metallic copper and copper oxide particles as well as planar copper surfaces was studied as a function of the degree of hydrolysis of PVFA, the pH, and the polymer concentration in solution. The chemical composition and molecular structure of the PVFA-co-PVAm layers were investigated by surface-sensitive spectroscopic methods such as XPS, DRIFT spectroscopy, and ellipsometry. The findings allowed us to explain the adsorption mechanisms and the forces driving the PVFA-co-PVAm adsorption. It was shown that PVFA-co-PVAm layers thicker than 30 nm are able to protect the planar copper surface against corrosive attack.

Control of amine functionality distribution in polyvinylamine/SBA-15 hybrid catalysts for Knoevenagel condensation

“…2, while atomic contributions of surface species are summarized in Table S1 (Supplementary data). The N 1s spectra were fitted with three peaks, indicating the presence of: (i) non-protonated amino (399.6 ± 0.1 eV), (ii) formamide (400.3 ± 0.1 eV) and (iii) protonated -NH 3 + groups (401.6 ± 0.1 eV) [16,20,21]. A significant decrease in the carbon and nitrogen amounts (cf.…”

Functionalization of mesoporous SBA-15 silica by grafting of polyvinylamine on epoxy-modified surface

“…8, the C 1s spectra can be resolved into four components. Two main components are related to aliphatic carbons (C-C and/or C-H bonds) in the polymer chains (285.3 ± 0.1 eV) and carbon atoms in the C-N and C-O groups (286.4 ± 0.1 eV) [36,37]. It is noteworthy that the intensity of these characteristic peaks increases with the polymer loading that readily suggests the appearance of PVAm grafted on the silica surface.…”

“…8). For all PVAm-functionalized samples, in the N 1s high-resolution spectra, we distinguish three different components related to: (i) non-protonated, primary amino groups (399.6 ± 0.1 eV), (ii) formamide groups (400.3 ± 0.1 eV), and (iii) hydrogen bonded or protonated amino species (401.5 ± 0.1 eV) [36][37][38]. The contribution of primary amino groups estimated on the basis of the XPS results changes from 76.6 % (for SBA-15_GPTMS_PVAm_0.10) to 81.3 % (for SBA-15_GPTMS_PVAm_2.50).…”

Radical Copolymerization of N‐Vinylformamide with Methylvinylketone: An Approach to Iminium/Imine Ring Containing Polymers

“…Hydrolysis of PNVF performs readily compared to other polymeric PVAm precursors because the formamide moiety hydrolyzes more easily in comparison to all other amide derivatives based on longer alkyl chain containing carboxylic acids . PVAm is applicable as adhesive, wetting agent, flocculant in papermaking and waste water treatment, or drag‐reducing polymer …”