Oxidized Poly

Alexandridis P and Hatton T A 1995 Poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) blook oopolymer surfaotants in aqueous solutions and at interfaoes thermodynamios, struoture, dynamios, modeling Colloids Surf. A 96 1-46... [Pg.2604]

J. W. Hastie and C. L. McBee, Mechanistic Studies ofFriphenylphosphine Oxide-Poly(ethylene terephthalate) and FelatedFlame Fetardant Systems, Feport NBSIF 75-741, Nad. Buieau of Standards Washington, D.C., 1975. [Pg.482]

When equal amounts of solutions of poly(ethylene oxide) and poly(acryhc acid) ate mixed, a precipitate, which appears to be an association product of the two polymers, forms immediately. This association reaction is influenced by hydrogen-ion concentration. Below ca pH 4, the complex precipitates from solution. Above ca pH 12, precipitation also occurs, but probably only poly(ethylene oxide) precipitates. If solution viscosity is used as an indication of the degree of association, it appears that association becomes mote pronounced as the pH is reduced toward a lower limit of about four. The highest yield of insoluble complex usually occurs at an equimolar ratio of ether and carboxyl groups. Studies of the poly(ethylene oxide)—poly(methacryhc acid) complexes indicate a stoichiometric ratio of three monomeric units of ethylene oxide for each methacrylic acid unit. [Pg.342]

Poly(ethylene oxide)—Poly(ethylene terephthalate) Copolymers. The poly(ethylene oxide)-poly(ethylene terephthalate) (PEO/PET) copolymers were first described in 1954 (40). This group of polymers was developed in an attempt to simultaneously reduce the crystallinity of PET, and increase its hydrophilicity to improve dyeabiHty. PEO/PET copolymers with increased PEO contents produce surfaces that approach zero interfacial energy between the implant and the adjacent biological tissue. The coUagenous capsule formed around the implant is thinner as the PEO contents increase. The stmcture of a PEO/PET copolymer is shown below ... [Pg.191]

Low molecular weight polymers of ethylene oxide, poly(ethylene glycol), are formed by allowing ethylene oxide to react with water or alcohols under the proper conditions (see PoLYETPiERs). The average molecular weight can be varied from 200 to 14,000 (32,33). [Pg.453]

Occasionally, water-soluble plastics are required. Poly(vinyl alcohol) is commonly the first to be considered but some cellulose ethers, polyethylene oxides, poly(vinyl pyrrolidone) and A-substituted polyamides are among many possible alternatives. [Pg.897]

Poly(ethylene terephtlhalate) Phenol-formaldehyde Polyimide Polyisobutylene Poly(methyl methacrylate), acrylic Poly-4-methylpentene-1 Polyoxymethylene polyformaldehyde, acetal Polypropylene Polyphenylene ether Polyphenylene oxide Poly(phenylene sulphide) Poly(phenylene sulphone) Polystyrene Polysulfone Polytetrafluoroethylene Polyurethane Poly(vinyl acetate) Poly(vinyl alcohol) Poly(vinyl butyral) Poly(vinyl chloride) Poly(vinylidene chloride) Poly(vinylidene fluoride) Poly(vinyl formal) Polyvinylcarbazole Styrene Acrylonitrile Styrene butadiene rubber Styrene-butadiene-styrene Urea-formaldehyde Unsaturated polyester... [Pg.434]

Water-soluble polymers eomprise a major elass of polymerie materials and are used in a wide variety of applieations. Synthetie water-soluble polymers inelude poly(vinyl aleohol), poly(aerylamide), poly(aerylie aeid), poly(ethylene oxide), poly(vinyl pyrrolidone), eellulosies, and many eopolymers of these types. Their end uses are quite varied and their applieations depend mainly on their viseosify-ing, rheologieal, and surfaee-aetive properties (1). For example, poly (vinyl aleohol) is used in adhesives, fibers, textile and paper sizing, paekaging, as a stabilizer for emulsion polymerization, and as a preeursor for the manufaeture of poly(vinyl butyral), whieh is used in automotive windshields. Poly(vinyl aleohol) is also the world s largest volume, eommodity, water-soluble polymer. [Pg.559]

Deschamps AA, Grijpma DW, and Feijen J. Poly(ethylene oxide)/poly(butylenes terephthalate) segmented block copolymers The effect of copolymer composition on physical properties and degradation behavior. Polymer, 2001, 42, 9335-9345. [Pg.248]

Reed AM and Gilding DK. Biodegradable polymers for use in surgery-poly(ethylene oxide) poly (ethylene terephthalate) (PEO/PET)copolymers 2. in vitro degradation [J]. Polymer, 1981, 22,499-504. Van Blitterswijk CA, Brink JVD, Eeenders H, et al. The effect of PEG ratio on degradation, calcification and bone bonding of PEO/PBT copolymer (Polyactive). Cell Mater, 1993, 3(1), 23-36. [Pg.248]

Cohn D, Stem T, Gonzales MF, and Epstein J. Biodegradable polyfethylene oxide)/poly( -caprolactone) multiblock copolymers. J Biomed Mater Res, 2002, 59, 273-281. [Pg.251]

Linse, P, Phase Behavior of Poly(ethylene oxide)-Poly(propylene oxide) Block Copolymers in Aqueous Solutions, Journal of Physical Chemistry 97, 13896, 1993. [Pg.615]

Table 5.1. Compressive strength of metal oxide-poly acrylic acid) cements Elliott, Holliday Hornsby, 1975 Hornsby, 1977)...

Ellis, J. Wilson, A. D. (1992). The formation and properties of metal oxide poly(vinylphosphonic acid) cements. Dental Materials, 8, 79-84. [Pg.316]

A related class of gels are those formed by extensive hydrogen bonding. An example is the polyethylene oxide)-poly(methacrylic acid) complex [18]. Spontaneously gelling natural polymer solutions are frequently of this type, including gelatin and native starch. [Pg.504]

SM O Connor, SH Gehrke, S Patuto, GS Retzinger. Fibrinogen-dependent adherence of macrophages to surfaces coated with poly(ethylene oxide)/poly(propylene oxide) triblock copolymers. Ann NY Acad Sci 831 138-144, 1997. [Pg.556]

Morey et al. (25) synthesized Ti-SBA-15 with uniform tubular channels (surface area = 600-900 m2/g, pore volume = 0.6-1.3 cm3/g, average pore diameter = 6.9 nm) by direct and postsynthesis methods by using triblock copolymers, poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) in... [Pg.169]

M. Sims, D.D.C. Bradley, M. Ariu, M. Koeberg, A. Asimakis, M. Grell, and D.G. Lidzey, Understanding of the origin of the 535 nm emission band in oxidized poly(9,9-dioctylfluorene) the essential role of inter-chain/inter-segment interactions, Adv. Fund. Mater., 14 765-781, 2004. [Pg.273]

Polyethyleneoxide-co-polypropyleneoxides, dispersants, S 710t Poly(ethylene oxide) film, physical properties of, 10 68It Poly(ethylene oxide) floe, 11 638 Poly(ethylene oxide)-poly(ethylene terephthalate) copolymers, bioresorbable polymers, 3 738 Poly(ethylene oxide) resins, molecular weight of, 10 684-685 Polyethylene oxides, dispersants, S 706t, 710t... [Pg.731]

Goh HW, Goh SH, Xu GQ, Lee KY, Yang GY, Lee YW, Zhang WD (2003). Optical limiting properties of double-C60-end-capped poly(ethylene oxide), double-C -end-capped polyethylene oxide)/poly(ethylene oxide) blend, and double-C -end-capped poly(ethylene oxide)/multiwalled carbon nanotube composite. J. Phys. Chem. B 107 6056-6062. [Pg.216]

X.D. Huang, S.H. Goh, Interpolymer complexes through hydrophobic interactions C60-end-capped polyethylene oxide)/poly(methacrylic acid) complexes, Macromolecules, pp. 8894-8897, 2000. [Pg.111]

Polymer electrolytes (e.g., poly (ethylene oxide), poly(propylene oxide)) have attracted considerable attention for batteries in recent years. These polymers form complexes with a variety of alkali metal salts to produce ionic conductors that serve as solid electrolytes. Their use in batteries is still limited due to poor electrode/electrolyte interface and poor room temperature ionic conductivity. Because of the rigid structure, they can also serve as the separator. Polymer electrolytes are discussed briefly in section 6.2. [Pg.184]

In most cases the catalytically active metal complex moiety is attached to a polymer carrying tertiary phosphine units. Such phosphinated polymers can be prepared from well-known water soluble polymers such as poly(ethyleneimine), poly(acryhc acid) [90,91] or polyethers [92] (see also Chapter 2). The solubility of these catalysts is often pH-dependent [90,91,93] so they can be separated from the reaction mixture by proper manipulation of the pH. Some polymers, such as the poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) block copolymers, have inverse temperature dependent solubihty in water and retain this property after functionahzation with PPh2 and subsequent complexation with rhodium(I). The effect of temperature was demonstrated in the hydrogenation of aqueous allyl alcohol, which proceeded rapidly at 0 °C but stopped completely at 40 °C at which temperature the catalyst precipitated hydrogenation resumed by coohng the solution to 0 °C [92]. Such smart catalysts may have special value in regulating the rate of strongly exothermic catalytic reactions. [Pg.74]

Scheme 8.2 Type of units assigned in oxidized poly(phenylhydrosilane) by H detected H- Si HMQC spectroscopy...

CH2)2-0-C hC-0 0 — 0 poly(phenylene oxide) poly(ethane-1,2-diyl terephthalate) poly(oxy-1,4-phenylene) poly(oxy ethane-1,2-diyloxy-terephthaloyl)... [Pg.316]

Polyacrylonitrile Poly(ethylene oxide) Poly(ethylene terephthalate) Polyisobutylene Poly(methyl methacrylate) Polypropylene Polystyrene... [Pg.727]

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