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  • 1
    Electronic Resource
    Electronic Resource
    Doped LaGaO3 Perovskite Type Oxide as a New Oxide Ionic Conductor (1994)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 116 (1994), S. 3801-3803 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja00088a016
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  • 2
    Electronic Resource
    Electronic Resource
    Trace elements (Cu, Fe, Zn) in several tissues of CCI4-induced chronic hepatitis rats (1986)
    Springer
    Bulletin of environmental contamination and toxicology 36 (1986), S. 306-310 
    Details
    ISSN: 1432-0800
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01623512
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  • 3
    Electronic Resource
    Electronic Resource
    Preparation and properties of oligoesterified wood blocks based on anhydride and epoxide (1992)
    Springer
    Wood science and technology 27 (1992), S. 23-34 
    Details
    ISSN: 1432-5225
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Summary Preparation and properties of oligoesterified woods in the form of block are reviewed. The oligoesterified wood blocks are prepared by stepwise addition reactions of dicarboxylic acid anhydride and epichlorohydrin (EpCl), or one-step chemical treatment with reactant solution of the anhydride and EpCl. Among the preparation methods investigated, the heating-suction method is industrially advantageous. In this method, wood blocks impregnated with the reactant solution are heated and then subjected to suction under reduced pressure and heating, to remove unreacted reactant solution. The oligoesterified wood blocks thus obtained contain oligoester chains formed by the alternate additions of the anhydride and EpCl to OH groups of wood. They also contain small amounts of free oligomers not linked with the wood matrix. Their dimensional stabilities against moisture and water become greater with increase in the apparent total weight increase due to the oligoester chains and the free oligomers. The oligoesterified wood blocks based on phthalic anhydride-EpCl are industrially promising, and exhibit higher compressive and flexural strenghts, greater chemical resistance, electric insulation, and much lower water absorption than untreated wood block. Furthermore, excellent resistances are observed against weathering and biodeterioration.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00203407
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  • 4
    Electronic Resource
    Electronic Resource
    Synthesis of polyesters by using divalent metal salts of monohydroxyethyl phthalate: Metal-containing polyesters from such metal salts, anhydride, and epoxide (1976)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Chemistry Edition 14 (1976), S. 1783-1795 
    Details
    ISSN: 0360-6376
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Synthesis of metal-containing polyesters by reactions of the divalent metal salts of monohydroxyethyl phthalate with phthalic anhydride and epoxide were investigated. It was found that the metal carboxylate groups of these metal salts catalyze the above reactions. These reactions were further studied in model reactions with the use of the Ca salt of monoethyl phthalate. Products obtained were linear metal-containing polyesters containing ionic links in the main chain; they were yellow or slightly yellow glassy materials; yields were generally high. Molecular weights obtained by the end-group analyses were generally low; with increase in content of the metal salts in the feed the molecular weight of the polyesters decreased. Inherent viscosities (in DMF at 30°C) of the metal-containing polyesters were low, ranging from 0.033 to 0.052. Elemental analyses are generally in good agreement with the calculated values. Thermogravimetric analyses of the polyesters were also discussed.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1976.170140718
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  • 5
    Electronic Resource
    Electronic Resource
    Metal-containing crosslinked polyester resins by combined polyesterification and polymerization of curable mixtures based on divalent metal salts of mono(hydroxyethyl)phthalate (1977)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Chemistry Edition 15 (1977), S. 2239-2253 
    Details
    ISSN: 0360-6376
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Preparations of metal-containing crosslinked polyester resins based on divalent metal salts of mono(hydroxyethyl)phthalate were investigated by the cure, by combined polyesterification and polymerization, of curable mixtures prepared from above metal salts, maleic anhydride, glycidyl methacrylate, and methyl methacrylate. The curable mixtures containing Ca showed lower viscosity than those containing Mg. They were subjected to curing reactions in the presence of peroxide and under photoirradiation, respectively. In the cure, polyesterification and polymerization proceeded simultaneously smoothly, giving metal-containing cured resins. Generally, the peroxide-cured resins showed better physical properties than the photo-cured resins. Especially, the former resins with high metal content showed high compressive strength and Rockwell hardness. Further, resistance to chemical attack and boiling water and thermal behavior are also discussed.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1977.170150915
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  • 6
    Electronic Resource
    Electronic Resource
    Synthesis of polymers by using divalent metal salts of mono(hydroxyethyl) phthalate: Metal-containing polyurethanes (1974)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Chemistry Edition 12 (1974), S. 455-468 
    Details
    ISSN: 0360-6376
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: As difunctional compounds containing an ionic bond in the molecule, divalent metal salts (I) of mono(hydroxyethyl) phthalate were prepared in high purity and high yield. Mg and Ca were selected as divalent metal. Metal-containing polyurethanes containing ionic links in the main chain were synthesized by the polyaddition reaction of I or, I-glycols with diisocyanates. The polyurethane obtained were glassy materials or white powders, depending on the species of diisocyanates and glycols. Close agreement between observed and calculated values of metal content of the polyurethanes were obtained. The viscosities (in dimethyl-formamide) of the polyurethanes decreased markedly with increasing of metal content. Moreover, the decomposition temperatures were lowered by introduction of metals into the polyurethanes. However, the decomposition rates of metal-containing polyurethanes were lower than those of polyurethanes not containing metal.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1974.170120216
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  • 7
    Electronic Resource
    Electronic Resource
    Synthesis of polymers by using divalent metal salts of mono(hydroxyethyl) phthalate: Metal-containing polyurethane-ureas (1974)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Chemistry Edition 12 (1974), S. 469-481 
    Details
    ISSN: 0360-6376
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A series of metal-containing polyurethane-ureas containing ionic links in the main chain was synthesized by the polyaddition reaction of hexamethylene diisocyanate with mixtures of metal salts of mono(hydroxyethyl) phthalate and bisureas containing two hydroxyl groups which were obtained from monoethanolamine and diisocyanates. The polyurethane-ureas obtained were generally yellowish powders or solids. Close agreement between observed and calculated values of metal content of the metal-containing polyurethane-ureas was obtained. The viscosities (in dimethylformamide) of polyurethane-ureas decreased markedly with increase of metal content. Moreover, the decomposition temperatures were lowered a little by introducing metals into the polyurethane-ureas. Dimethylformamide, m-cresol, and dimethyl sulfoxide were comparatively good solvents for the metal-containing polyurethane-ureas; however, the polymers were insoluble in all other solvents.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1974.170120217
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  • 8
    Electronic Resource
    Electronic Resource
    Synthesis of polymers by use of divalent metal salts of monohydroxyethyl phthalate: Metal-containing isocyanurate-type crosslinked polyurethanes (1974)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Chemistry Edition 12 (1974), S. 2419-2433 
    Details
    ISSN: 0360-6376
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Divalent metal salts (I) of monohydroxyethyl phthalate have catalytic activity for polymerization of isocyanate groups. The synthesis of novel metal-containing isocyanurate-type crosslinked polyurethanes were investigated by the crosslinking reaction of I in DMF with diisocyanates or urethane prepolymers, that is, diisocyanate adducts of polyethylene glycol. 2,4-Toluene diisocyanate and diphenylmethane diisocyanate were used as diisocyanates, and DMF was the solvent. The crosslinking reactions were followed by determining the gelation time. Gelation time decreased with increasing temperature. The Ca salt was more effective than the Mg salt in the crosslinking reaction. The yields of resulting metal-containing three-dimensional polymers decreased with increasing metal content in the feed. The Ca salt was more easily introduced into the network polymers than the Mg salt was. Decomposition temperatures decreased on introducing metals into the network polymers. Some physical properties of the metal-containing network polymers are also discussed.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1974.170121023
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  • 9
    Electronic Resource
    Electronic Resource
    Metal-containing cured polyesters from divalent metal salts of mono(hydroxyethyl) phthalate, bisester anhydrides, and monoepoxide (1978)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 22 (1978), S. 3371-3386 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Synthesis of novel metal-containing cured polyesters was investigated by the reaction of divalent metal salts of mono(hydroxyethyl) phthalate-bisester anhydride-monoepoxide. As the bisester anhydride, ethylene glycol bis(trimellitate) dianhydride (ETDA), diethylene glycol bis(trimellitate) dianhydride (DETDA), and polyethylene glycol bis(trimellitate) dianhydride (PETDA) were used. They were prepared from trimellitic anhydride and glycols. Phenyl glycidyl ether was the monoepoxide used. In the reactions, the Mg salt showed considerably higher catalytic activities than the Ca salt. As for the physical properties of the cured resins, heat distortion temperature, Rockwell hardness, and compressive strength decreased in the order ETDA 〉 DETDA 〉 PETDA. Generally, the resins containing Mg showed better physical properties than those containing Ca. Resistance to chemical attack and boiling water, thermal behavior, and electrical resistances are also discussed.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1978.070221203
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  • 10
    Electronic Resource
    Electronic Resource
    Ionic crosslinking of carboxyl-terminated liquid rubbers with metal oxides (1979)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 24 (1979), S. 811-826 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Ionic crosslinking of carboxyl-terminated liquid rubbers with metal oxides and metal carbonates, mainly with the former, were investigated. The liquid rubbers used were a polymer of butadiene (Hycar CTB 2000X162) and a copolymer of butadiene-acrylonitrile (Hycar CTBN 1300X8). The CTBN ionically crosslinked rubbers obtained showed higher tensile strength than the CTB series, due to the polarity effect of the nitrile groups. The ionic rubbers cured with MgO and CaO were studied in detail, and it was found that their tensile strength increased markedly with increase in the metal oxides used, and in addition white carbon and carbon black showed remarkable reinforcing effects. The properties such as tensile strength, elongation, Shore A hardness, and melt index are influenced by humidity. It is characteristic of these ionically crosslinked rubbers that they can be successfully reprocessed.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1979.070240317
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