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Poly vinylamine

T. W. Lai and B. R. Vijayendran. Cement composition for oil well drilling holes containing high molecular weight poly(vinylamines). Patent EP 331045, 1989. [Pg.420]

The weakly nucleophilic anion tetrafluoroborate has also been used to catalyze the nonaromatic cyclization of poly vinylamine to polytetrahydropyrimidinium by Schmidt (2) using ethyl orthoester as illustrated in Eq. (1). [Pg.144]

In order to study the shape of a polymer chelate, viscometric measurements of a homogeneous solution of PVP were carried out46. The reduction in viscosity of the PVP solution with increasing concentration of metal ions is shown in Fig. 8(a). At constant PVP concentration, an increase in the amount of metal ions added causes a decrease in viscosity, which reveals that the polymer-ligand chain is markedly contracted due to intra-polymer chelation. An intra-polymer chelate takes a very compact form and the metal ions are crowded within the contracted polymer chain, as illustrated in Fig. 8(b). The contracted shape of an intra-polymer chelate was also reported for PAA47, poly(vinylamine)48, and poly(vinylalcohol)49. ... [Pg.26]

Specific carbohydrate ligands may be linked to these polymers in order to enhance the cell-adhesion properties of the biomaterial or in order to modify their physicochemical properties. An example is a biomimetic surfactant polymer of a poly(vinylamine) backbone bearing pendant maltoheptose units to increase local hydration and to inhibit non-specific adsorption.102... [Pg.382]

The efficiency of the initiation reaction increases with the degree of polymerization of the polymer. The significance of the configuration of the polymer is pointed out in the case of the poly(vinylamine)-Cu(II) complex. The amino moiety which is close to the square configurational Cu(II)-NH2 form is activated and gives the initiator radical. [Pg.97]

A conversion degree of more than 95 % was achieved by the poly(N-vinyl succin-imide) and poly(N-vinyl acetamide) methods, while by the poly(N-vinyl carbamate) method essentially pure poly(vinylamine) was obtained. [Pg.59]

Copolymers of vinylformamide with acrylamide, methacrylic acid, (II), methacrylates, acrylonitrile, and acrylamide were prepared by Hund [2] and used as flocculants and coagulants in waste water treatment. Sommese [3] prepared poly(vinylamine-co-A-vinylformamide), (III), having molecular weights between 0.8 X 10 and 2.0 X 10 daltons, which were used as coagulants in wastewater treatment. [Pg.412]

Lindsay [4] used poly(vinylamine-co-Af-vinylformamide), (II), containing roughly 70% amine content as a component in textile materials and paper to improve wet strength properties. [Pg.412]

The coordinative polymer binding of metal phtalocyanines was examined using polymer ligands like poly(ethylene imine) , poly(vinylamine) , poly(acrylamide) mo fied by dipropylenetriamine and silicagel modified by y-amino-propyl-triethoxysilan . ... [Pg.56]

Chondroitin sulfate Cellulose sulfate Gellan Hyaluronic acid Poly(acrylic acid) Xanthan Poly(vinylamine)... [Pg.608]

Keywords Hybrid material Silica Polyelectrolyte adsorption Poly(vinylamine-co-vinylformamide)... [Pg.43]

Poly(vinylformamide-co-l,3-divinylimidazolid-2-one) Polyfvinylformamide- co-vinyl amine) Poly(vinylamine-co-l,3-divinylimidazolid-2-one) Polyfvinylformamide- co-vinyl amine) which contains x w/w-% of the PVAm fraction (randomly distributed)... [Pg.44]

Fig. 11 Scheme of layer-by-layer assembly of polyelectrolytes on activated porous supporting membrane. The separation layer is obtained upon multiple repetition of steps A and B. In reality, pore diameters are 20 to 200 nm, polymer chains are less ordered and partially overlapping. Polyelectrolytes PVA, poly(vinylamine) PAH, poly(allylamine hydrochloride) PEP, polyethyleneimine (branched), P4VP, poly(4-vinylpyridine) PDADMA, poly(diallyldimethylammonium chloride) PVS, poly(vinylsulfate) PVSu, poly(vinylsulfonate) PSS, poly(styrenesulfonate) PAA, polyacrylic acid DEX, dextran sulfate (from Ref. [70])... [Pg.193]

Smets, DeWinter and Delzenne attached eosin units to polyvinyl-amine) through the amino groups. Photopolymerization was initiated at the eosin sites, yielding grafts of poly(vinylamine-eosin-poly-(acryla-mide) where X is —CONH2. [Pg.8]

Lewis EA, Barkley J. Pierre TS. Calorimetric titration of poly(vinylamine) and poly(iminoethylene). Macromolecules 1981 14 546-551. [Pg.663]

Figure 5.6 (A) A poly(vinylamine) brush is complexed with Specific interactions between Nf and... Figure 5.6 (A) A poly(vinylamine) brush is complexed with Specific interactions between Nf and...
Poly(vinylamine-co-vinylamine boronate) water 2009CHE... [Pg.172]

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See also in sourсe #XX -- [ Pg.65 ]



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