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  • 1
    Electronic Resource
    Electronic Resource
    Preparation and characterization of a series of poly[oxy-1-(ω-bromoalkyl)ethylene]sThis paper is dedicated to Professor Paul Rempp on the occasion of his sixtieth birthday, with best personal regards (1989)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 190 (1989), S. 2019-2030 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: 2-Bromoethyloxirane (2b), 3-bromopropyloxirane (2c), and 4-bromobutyloxirane (2d), were prepared by epoxidation of the corresponding bromoalkenes. Treatment of the oxiranes with a triethylaluminium/acetylacetone/water mixture afforded the polyethers 3b-d in good yield as tacky, white elastomers. Substitution of bromide by benzoate ion established essentially equal reactivities for the three polymers; each was substantially more reactive than any of the halogenated polyether elastomers available heretofore.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1989.021900902
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Preparation of the precursors of new tannin-like polymers with potential biological effects (1992)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 193 (1992), S. 3037-3044 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: New acrylate based polymers, with the potential to be converted to polyphenolic polymers  -  poly[2-(4-benzyloxyphenyl)ethyl acrylate] (4) and poly[3-(4-benzyloxy-3-methoxyphenyl)propyl acrylate] (9)  -  were prepared from the corresponding monomers 3 and 8 by free-radical polymeri- zation, initiated by 2,2′-azoisobutyronitrile (AIBN). The acrylate monomers, 2-(4-benzyloxy- pheny1)ethyl acrylate (3) and 3-(4-benzyloxy-3-methoxyphenyl)propy1 acrylate (8), were synthes- ized from acryloyl chloride and the corresponding alcohols  -  2-(4-benzyloxyphenyl)ethanol(2) and 3-(4-benzyloxy-3-methoxyphenyl)- 1 -propano1 (7), respectively. The monomer 7 was prepared from 3-(4-benzyloxy-3-methoxyphenyl)-1-propene (6) by hydroboration/oxidation and 6 was obtained from eugenol(4-allyl-2-methoxyphenol) as the starting material. The compounds were characterized by 1H NMR, 13C NMR, FTIR, and elemental analyses. The molecular weight of the synthesized polymers was determined by gel-permeation chromatography (GPC).
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1992.021931210
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Preparation and polymerization of the two isomeric (chloromethyl)oxetanes (1990)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part A: Polymer Chemistry 28 (1990), S. 573-583 
    Details
    ISSN: 0887-624X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: 2-(Chloromethyl)oxetane was prepared in 8% overall yield from 2-propen-1-ol by protection of the alcohol with dihydropyran, epoxidation, ring expansion with dimethylsulfoxonium methylide, acid deprotection, and chlorination with triphenylphosphine in CCl4. 3-(Chloromethyl)oxetane was prepared in 22% overall yield by hydroboration-oxidation of 3-chloro-2-chloromethyl-1-propene followed by base-catalyzed cyclization. Each of the oxetanes was converted to the corresponding elastomeric homopolymer by treatment with a triethylaluminum-acetylacetone-water mixture. Poly[2-(chloromethyl)oxetane] was found to be similar to polyepichlorophydrin in reactivity toward benzoate ion, whereas poly[3-(chloromethyl)oxetane] is more reactive by a factor of 2.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pola.1990.080280309
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  • 4
    Electronic Resource
    Electronic Resource
    Electrochemical synthesis and optical analysis of poly[(2,2′-dithienyl)-5,5′-diylvinylene] (1988)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part B: Polymer Physics 26 (1988), S. 911-920 
    Details
    ISSN: 0887-6266
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The electrochemical synthesis of poly[(2,2′-dithienyl)-5,5′-diylvinylene tetrafluoroborate] (PDTE/BF4) has been accomplished and provides coppery-black free-standing films with a room-temperature four-probe conductivity as high as 15 (Ω cm)-1. The conductivity and morphology of the films were found to be strongly dependent on synthetic conditions. The oxidized form of PDTE is not air stable, as evidenced by a rapid, three order of magnitude drop in the conductivity. Optoelectrochemical experiments demonstrate that bipolarons are the main charge-carrying species in conductive PDTE and allow their evolution to be followed as a function of oxidation.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/polb.1988.090260415
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  • 5
    Electronic Resource
    Electronic Resource
    Solid-phase rheology of an anisotropic polymer (vectra A) (1995)
    New York, NY : Wiley-Blackwell
    Polymers for Advanced Technologies 6 (1995), S. 693-702 
    Details
    ISSN: 1042-7147
    Keywords: anisotropic ; liquid crystal ; plasticity ; rheology ; solid-phase ; thermotropic ; Vectra ; 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
    Notes: The solid-phase rheology of a thermotropic polyester which is liquid crystalline in the melt (Vectra A) was studied for one-dimensional finite-amplitude deformations, including step-strain and recovery, step-stress and recovery, and step-strain followed by small-amplitude oscillations. The rheology is complex, and cannot be described by existing models. Below a critical strain, which is history-dependent, Vectra A deforms as a linear viscoelastic solid. Above the critical strain the deformation is both viscoplastic and viscoelastic. There appears to be a maximum recoverable strain of about 0.03, beyond which all deformation is nonrecoverable. A large number of relaxation modes is required to describe the stress, and one time scale is inadequate to describe the time-dependence of yielding and plastic flow.
    Additional Material: 14 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pat.1995.220061103
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  • 6
    Electronic Resource
    Electronic Resource
    Solvent replacement in the synthesis of persubstituted phosphonitrilic hydroquinone prepolymer materials (1994)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 52 (1994), S. 501-505 
    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: A desirable solvent replacement has been effected in the synthesis of persubstituted phosphonitrilic hydroquinone prepolymer materials. The replacement of carbon tetrachloride with cyclohexane has no adverse effect on the composition and quality of the material prepared. The overall yield of the reaction increases from 65 to 70% and the toxicity of the reaction mixture and of the waste generated from the reaction are greatly reduced. The particularly close match of solvent properties between carbon tetrachloride and cyclohexane makes this an excellent solvent replacement. Such changes to less-expensive, less-toxic, and less-environmentally damaging solvents are on the increase. A brief list of some known replacement solvents for use in polymer and coatings applications is presented. © 1994 John Wiley & Sons, Inc.This article is a US Government work and, as such, is in the public domain in the United States of America.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1994.070520404
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  • 7
    Electronic Resource
    Electronic Resource
    Difluorocarbene modification of polymer and fiber surfaces (1969)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 13 (1969), S. 1523-1535 
    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: Difluorocarbene (difluoromethylene, :CF2) generated by the pyrolysis of sodium chlorodifluoroacetate has been shown to irreversibly modify the surfaces of polymers and fibers. The critical surface tension values of several polymers are shown to decrease with increasing exposure to difluorocarbene vapors and ultimately approach the critical surface tension values of partially fluorinated polyethylenes. The rate-controlling step appears to be the diffusion of difluorocarbene from the precursor to the polymer substrate. The nature of the interaction between difluorocarbene and the polymer surface is unknown; however, the absence of infrared bands due to C—F bonds in attenuated total reflection measurements tends to establish the mono-molecular-like character of the modified surface.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1969.070130715
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  • 8
    Electronic Resource
    Electronic Resource
    Modification of polyethylene surfaces with carbethoxy substituted carbenes and nitrenes (1969)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 13 (1969), S. 1537-1544 
    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: Carbethoxycarbene, carbethoxynitrene, and nitrene generated respectively by the pyrolysis of ethyl diazoacetate, ethyl azidoformate, chloramine and sodium hydroxyl amine-o-sulfonate are shown to irreversibly modify the surface of polyethylene as shown by wettability measurements. The nature of the modification is not fully understood; however, insertion of the carbene or nitrene into a carbon-hydrogen bond appears likely. The modified surfaces thus formed are shown to undergo several classical organic reactions as again determined by wettability measurements.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1969.070130716
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  • 9
    Electronic Resource
    Electronic Resource
    An AES (SAM), ESCA and ISS study of the oxidation of Pt3/Sn. 1: low pressure exposure to o2 (1986)
    Chichester [u.a.] : Wiley-Blackwell
    Surface and Interface Analysis 9 (1986), S. 169-173 
    Details
    ISSN: 0142-2421
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: ESCA, ISS, AES and scanning Auger microscopy have been used to examine a sputter-cleaned Pt3Sn alloy surface before and after exposure to oxygen at 10-6 Torr. It is found that the amount of oxygen adsorbed on a sputtered surface is a strong function of sample temperature with a maximum at about 200°C. The clean surface consists of regions of varying Pt-to-Sn concentration ratios. Regions near grain boundaries are tin rich, and the tin concentration decreases in moving away from a grain boundary until a platinum-rich region is reached. ESCA shows that an exposure to oxygen causes oxidation of the tin but no change in the Pt core-level features. ISS shows that segregation of tin to the surface occurs and that the surface Pt concentration decreases due to coverage by the tin.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/sia.740090307
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  • 10
    Electronic Resource
    Electronic Resource
    An ISS study of platinized titania (1986)
    Chichester [u.a.] : Wiley-Blackwell
    Surface and Interface Analysis 9 (1986), S. 258-259 
    Details
    ISSN: 0142-2421
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/sia.740090417
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