Polypyrrolidone

Colour Retn. Aid 1202 Poly vinyl polypyrrolidone NS 26th Series 696, p 26, 1983... 

Chem. Descrip. 2-Pyrrolidone CAS 616-45-5 EINECS/ELINCS 204-648-7 Uses Monomer for polypyrrolidone solvent for polymers, insecticides, polyhydroxylic alcohols, sugars, iodine, specialty inks used in petrol, processing and acrylonitrile mfg. solvenL solubilizer, intermediate for pharmaceuticals plasticizer/coalescing agent for actylic latexes, actylic-styrene copolymers in emulsion-type floor coalings intermediate for N-methylol derivs., alkaloids related to peganine, amino-butyric acid derivs. adhesives... 

Nylon 4 or polypyrrolidone is an attractive polymer for use in fibers. The original syntheses of nylon 4 from 2-pyrroUdone were carried out by alkaline catalyzed ring opening polymerizations promoted by N-acylpyrrolidone [49]. The products from these reactions melt between 260 and 265°C. 

It is also possible to fractionate wine anthocyanins on the basis of their degree of polymerization on a hand-packed column consisting of polyvinyl-polypyrrolidone, silica gel G, and silica 60. The free anthocyanins elute in the first fraction (methanol-HCl 999 1), slightly polymerized anthocyanins in the second fraction (formic acid-water 1 1), and the condensed polymeric forms are eluted in 100% formic acid. The absorbance of the three fractions is read spectrophotometrically (538 nm for the first fraction and 525 nm for the second and third fractions) and their relative proportions may thus be calculated. This test is a very good indicator of the age of a wine the younger the wine the higher the absorbance of the first fraction due to the presence of anthocyanin monomers conversely, the absorbance of the third (polymerized) fraction will be greatest in older wines. 

PMR spectroscopy has been applied to the characterisation of a wide range of homopolymers including PMMA [286-289], PVC [290-294], PS [293, 295, 296], polyvinyl ethers [297-300], polyacrylic acid [301], poly(methyl-a-chloroacrylate) [302], carboxy terminated polybutadiene [303], poly(a-methyl styrene) [304], natural rubber [305-307], chlorinated polyisobutylenes [308], sulfonated PS resins [309, 310], polyvinyl phenyl ether [311], lactone polyester [312], chlorinated PVC [313], PC [314], poly 1,3 butadiene [315], poly-2-allyl phenyl acrylate [316], poly(4-methyl-pentene-1) [317], polymethacrylic acid [318], PP [296], cyclic ethers [319], polymethacrylonitrile [320], poly(a-methyl styrene) tetramer [321], PEG [322], PE [289], polyacrylamide [311], polymethylacrylamide [323], polypyrrolidone [324], polychloroprene [325], phenol formaldehyde resins [326, 327], Nylon 66 [328], polyvinylidene fluoride [329], polyvinyl formate [330], polyacrylonitrile [331], epoxy resins [332], allyl biguanide [333], poly(2-isopropyl-2-oxazollines) [334] and trehalose vinyl benzyl ether [335]. 

Besides this certainiy most important method of end group stabiiization of poiyoxy-methyiene with acetic anhydride, other compounds, such as aiiphatic and aromatic anhydrides or carbon acid imide have also been used, some in the presence of acidic catalysts such as Lewis acids or sulfonic acids. In addition to alkali acetates and tertiary amines as basic catalysts, the following are also mentioned polyamides, polypyrrolidones, or quaternary ammonium and phosphonium salts. 

A limited number of studies have been performed on crosslinked polypyrrolidone and vinyl pyrrolidone-silicone copolymers [46] and l-vinyl-2-pyrrolidone-l-vinyl 3-methyl imidozolonium chloride copolymer [47]. 

Uses Monomer for polypyrrolidone solvent for polymers, insecticides, polyhydrox-... 

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