N-Vinylpyrrolidone polymer

VINYLBUTYROLACTAM) PROTAGENT PVP SUBTOSAN VINISIL N-VINYLBUTYROLACTAMPOLYMER N-VINYLPYRROLIDONE POLYMER... 

The influence of poly(N-vinylpyrrolidone) polymers (PVP) as electrolyte additives on the performance of lead—acid batteries has been studied, but controversial results are reported by different research groups depending on the molecular weight and concentration of the polymer used. The application of PVP as additive to the positive or negative active materials is probably more effective than if added to the electrolyte. 

Synonyms 1-Ethenyl-2-pyrrolidinone homopolymer 1-Ethenyl-2-pyrroli-dinone polymers Poly 1-(2-oxo-1-pyrrolidinyl) ethylene] Polyvidone Polyvidonum Poly (n-vinylbutyrolactam) Po (1-vinyl-2-pyrrolidinone) homopolymer Polyvinylpyrrolidone Povidone PVPP N-Vinylbutyro-lactam polymer 1 -Vinyl-2-pyrrolidinone polymer Vinyl pyrrolidone homopolymer N-Vinylpyrrolidone polymer... 

Synonyms 1-Ethenyl-2-pyrrolidinone, polymer with ethenylbenzene PVP/ styrene copolymer 2-Pyrrolidinone, 1-ethenyl-, polymer with ethenylbenzene 2-Pyrrolidinone, 1-vinyl-, polymer with styrene Sty-rene-vinylpyrrolidinone polymer Styrene-vinylpyrrolidone copolymer Styrene-N-vinylpyrrolidone polymer 1-Vinyl-2-pyrrolidinone polymer with styrene Vinylpyrrolidinone-styrene polymer Vinylpyrrolidondsly-rene copolymer... 

Styrene-vinylpyrrolidinone polymer Styrene-vinylpyrrolidone copolymer Styrene-N-vinylpyrrolidone polymer. See Styrene/PVP copo -mer... 

N-Vinylbutyrolactam polymer 1-Vinyl-2-pyrrolidinone polymer Vinyl pyrrolidone homopolymer N-Vinylpyrrolidone polymer... 

Styrene-vinylpyrrolidinone polymer. See Vinylpyrrolidone/styrene copolymer Styrene/PVP copolymer Styrene-vinylpyrrolidone copolymer. See Vinylpyrrolidone/styrene copolymer Styrene/PVP copolymer Styrene-N-vinylpyrrolidone polymer. See Vinylpyrrolidone/styrene copolymer Styrene/PVP copolymer Styrobiend FR. See Styrene/butadiene polymer... 

Vinylpyrrolidone/methylvinylimidazolium chloride copolymer. See Polyquaternium-16 N-Vinylpyrrolidone polymer. See PVP 1-Vinyl-2-pyrrolidone polymer, compd. with iodine. See PVP-iodine Vinylpyrrolidone/styrene copolymer CAS 25086-29-7... 

Poly( 1 -vinyl pyrrolidone- Styrene-N-vinylpyrrolidone polymer 25086-29-7... 

There are several other interesting polymers forming SAH with swellings up to 1500 ml g 1 under irradiation in aqueous solutions, such as sodium salts of PAAc [83], copolymers of AAm with AAc [22], poly-N-vinylpyrrolidone [84], PVA... 

Typical examples of organic polymers satisfying the above requirements are as follows poly (2-methyl-2-oxazoline) (2), poly(N-vinylpyrrolidone) (3), or poly(N,N-... 

Several approaches have been undertaken to construct redox active polymermodified electrodes containing such rhodium complexes as mediators. Beley [70] and Cosnier [71] used the electropolymerization of pyrrole-linked rhodium complexes for their fixation at the electrode surface. An effective system for the formation of 1,4-NADH from NAD+ applied a poly-Rh(terpy-py)2 + (terpy = terpyridine py = pyrrole) modified reticulated vitreous carbon electrode [70]. In the presence of liver alcohol dehydrogenase as production enzyme, cyclohexanone was transformed to cyclohexanol with a turnover number of 113 in 31 h. However, the current efficiency was rather small. The films which are obtained by electropolymerization of the pyrrole-linked rhodium complexes do not swell. Therefore, the reaction between the substrate, for example NAD+, and the reduced redox catalyst mostly takes place at the film/solution interface. To obtain a water-swellable film, which allows the easy penetration of the substrate into the film and thus renders the reaction layer larger, we used a different approach. Water-soluble copolymers of substituted vinylbipyridine rhodium complexes with N-vinylpyrrolidone, like 11 and 12, were synthesized chemically and then fixed to the surface of a graphite electrode by /-irradiation. The polymer films obtained swell very well in aqueous... 

Gold nanoparticles can also be stabilized using polymers that do not have specific functional groups through physisorption. Among the possible stabilizers, the polymers used most often to stabilize Au NPs are the water soluble polymers poly(N-vinylpyrrolidone) (PVP), polyethylene glycol) (PEG), poly(vinyl pyridine), poly(vinyl alcohol) (PVA), poly(vinyl methyl ether) (PVME), and polyelectrolytes such as PAA, chitosan, polyethyleneimine (PEI) or poly(diallyl dimethylammonium) chloride (PDDA) [99]. 

Versatic acid vinyl esters Vinyl ethers N-Vinylpyrrolidone Vinyl chloride Vinylidene chloride Semicrystalline polymers (2)... 

With controllable strength of the self- and hetero-associated hydrogen, a molecular level penetrated semi-interpenetrating polymer networks (semi-IPNs) of ST-VPDMS with poly(N-vinylpyrrolidone) (PVPr) were prepared by condensation of the self-associated silanols.13... 

Several monomers of water-soluble polymers were analyzed with the help of the proposed two-dimensional diagram (Figs. 4 and 5, Scheme 1). In Fig. 4, the data for four synthetic monomers, N-vinylcaprolactam (VCL), N-vinylpyrrolidone (VP), AT-isopropylacrylamide (NIPA), and 1-vinylimidazole (Vim), at different temperatures are presented, and in Fig. 5, the data for eight amino acids are shown. 

These monomers have been copolymerized with N-vinylpyrrolidone. Further polymers have also been obtained by reaction of the free drugs with copolymers from maleic anhydride. These polymeric drugs besides an extended activity, show the same or a decreased activity as the low molecular drug. 

Existence of pyrrolidone moiety in the polymer does not always assist in the favorable hydrophobic binding. Poly(N-vinylimidazole-co-N-vinylpyrrolidone), poly(NIM-pr), gives the second order kinetics in the hydrolysis of PNPA(5). 

N-Carboxyanhydride of a-amino add is polymerized by the nucleophile-containing polymers such as poly(N-vinyl-2-ethylimidazole), poly(N-vinyl-2-ethylimidazole-co-acrylamide) and poly(N-vinyl-2-ethylimidazole-co-N-vinylpyrrolidone) (102, 103). The rate of polymerization increases with the order of pyrrolidone, amide and imidazole moieties. The order corresponds to the magnitude of the bond formation which is observed in 1R measurement. The rate also increases with the content of pyrrolidone moiety. The rate in N, N -dimethylformamide solution which is unfavorable to the hydrogen bond formation is lower than that in acetophenone. These results show that the hydrogen bond formation is notable as the binding. 

In some cases of the titration of one polymer with another one (p %tner are complementary, i.e. they contain groups, which are capable to interact speciBcally, e.g. poly(acryIic add) and the copolymer of N-vinylpyrrolidOiie and rylic suad) no inflection point on the titration curves were observed. Therefore, the titrations do not indicate the interaction in PAA-VP/AA system, in contrast to systems composed of poly(methacrylic acid) and the copolymer N-vinylpyrrolidone and acrylic add (Fig. 2). Apparently, subtle differences in the chemical structure of components predetermine the possibility or impossibility of complex formation, which is an evidence for a high selectivity of the polymer-polymer interactions. Even when one of the components is a low molecular compound (Fig. 1, curve 1), complex formation is not observed. Interpolymer complexes can be divided into several types, due to the kind of the dominating interaction ... 

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