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  • Electronic Resource  (5)
  • 1985-1989  (5)
  • Polymer and Materials Science  (3)
  • interface  (2)
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  • Electronic Resource  (5)
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  • 1
    Electronic Resource
    Electronic Resource
    Dynamic-mechanical properties of interfacially modified glass sphere filled polyethylene (1988)
    Springer
    Rheologica acta 27 (1988), S. 397-404 
    Details
    ISSN: 1435-1528
    Keywords: Composite ; silane coupling agent ; interface ; Fourier transform infraredspectroscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Abstract Model composites of spherical glass particles dispersed in a matrix of high density polyethylene were prepared both with and without interfacial modification by an azidofunctional trialkoxysilane. Dynamic mechanical measurements of the composites in the melt state were recorded. The unmodified composites behave as theoretically predicted and the effect of particle—particle interaction at high volume fractions can be measured. The composites with a modified interfacial region have greater shear moduli due to the effect of a region surrounding the particle modified by the silane. The material in this region is largely bound to the glass surface and was examined by Fourier transform infrared spectroscopy after extraction of the bulk matrix. Theoretical calculations are shown to be useful in calculating the mechanical properties and volume fraction of the interfacial region.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01332160
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Interfacial effects on the melt state behavior of polyethylene-EPDM-calcium carbonate composites (1988)
    Springer
    Rheologica acta 27 (1988), S. 273-278 
    Details
    ISSN: 1435-1528
    Keywords: Composite ; silane coupling agent ; interface ; maleic anhydride-modifiedrubber
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Abstract Dynamic mechanical spectra of various composites of high density polyethylene (PE), ethylene propylene diene rubber (EPDM), and calcium carbonate were obtained at 190°C with a parallel plate instrument. Interfacial effects were found to have a significant influence on the dynamic mechanical behavior of these composites. Composites of calcium carbonate in PE displayed prominent particle—particle interaction effects. This resulted in a greatly enhanced dynamic shear modulusG d due to the filler addition. Treatment of the calcium carbonate with gamma-aminopropyltriethoxysilane (γ-APS) or gamma-methacryloxypropyltrimethoxysilane (γ-MPS) significantly reduced the particle—particle interactions. Solution deposition of EPDM or EPDM grafted with maleic anhydride (EPDM-MA) on the calcium carbonate, before incorporation into a PE composite, also had a significant effect on the composite properties. Comparison of data from composites treated with EPDM vs. EPDM-MA suggested the presence of an interaction between the calcium carbonate surface and the maleic anhydride modification. This conclusion was further supported by solid state proton NMR relaxation model experiments which showed significant immobilization of the EPDM-MA chains on the filler surface. The treatment of calcium carbonate withγ-APS orγ-MPS before incorporation into multicomponent polyethylene-rubber-filler composites also had a significant influence on the dynamic mechanical properties of the resultant composites. There is evidence for a reaction betweenγ-APS and EPDM-MA during processing on the roll mill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01329743
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Polymerization of diethynyldiphenylmethane: DSC, FTIR, NMR, and dielectric characterization (1989)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part B: Polymer Physics 27 (1989), S. 1611-1627 
    Details
    ISSN: 0887-6266
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: 4,4′-Diethynyldiphenylmethane thermally polymerizes by a free radical mechanism to a highly crosslinked structure of interest as a high temperature composite matrix resin. The polymerization reaction was characterized by differential scanning calorimetry, Fourier-transform infrared (FTIR) spectroscopy, 1H and 13C nuclear magnetic resonance (NMR) spectroscopy, and microdi-electrometry. The predominant reaction mechanism appears to be linear polymerization through the acetylene end groups, which follows first-order kinetics. However, during the early stages of reaction a second, more rapid polymerization mechanism is evident; it is postulated that this is the formation of a cyclic trimer, which is kinetically favored but sterically prohibited as the crosslinked network grows. Formation of a liquid crystalline trimer is hyppthesized; such intermediate formation is supported by intensity increases in the aromatic region of the NMR spectra, by FTIR difference spectroscopy comparisons with model compounds, and by enhancement of conductivity as observed by microdielectrometry.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/polb.1989.090270803
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Chemical reactions in the bulk of the epoxy-functional silane hydrolyzate (1986)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 140 (1986), S. 127-134 
    Details
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Die chemischen Reaktionen im Hydrolysat von epoxy-funktionalisierten Silanen wurden mit Hilfe der Fourier-Transform-IR-Spektroskopie untersucht. Hierbei wurde festgestellt, daß die durch Hydrolyse entstandenen Silanolgruppen beim Erhitzen sowohl den Epoxyring öffnen als auch selbst kondensieren. Die Kinetik dieser Reaktionen wurde untersucht und die relativen Reaktionsgeschwindigkeiten berechnet.
    Notes: Chemical reactions in the epoxy-functional silane hydrolyzate bulk have been studied by Fourier transform infrared spectroscopy (FT-IR). It was found that the silanol group opened the epoxy ring upon heating, concurrently with the silanol condensation. The kinetics of these reactions were studied, and the relative reaction rates were obtained.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1986.051400110
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Chemical reactions of poly(vinyl pyridine)s with epoxy compounds (1986)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 142 (1986), S. 17-27 
    Details
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Die Reaktion zwischen Polyvinylpyridinen und Epoxyverbindungen wurde sowohl in homogenen Lösungen als auch im festen Zustand mit Hilfe der Fourier-Transform-Infrarotspektroskopie und anderer Techniken untersucht. Es wurde beobachtet, daß die Pyridinseitengruppe mit den Epoxygruppen unter Bildung von Netzwerken, die Pyridon- und cyclische Amidstrukturen enthalten, reagiert. Diese Reaktion wurde ebenso in der Grenzflächenregion zwischen Polyvinylpyridin und Überzügen aus γ-Glycidoxypropyltrimethoxysilanhydrolysat auf Poly(ethylenterephthalat)-Fasern beobachtet.
    Notes: Chemical reactions of poly(vinyl pyridine)s and epoxy compounds were studied both in homogeneous solution and in solid state by Fourier transform infrared spectroscopy and other techniques. The pyridine side group was found to react with the epoxy group, forming networks which contain pyridone and cyclic amide structures. This reaction was observed also in the interfacial region of poly(vinyl pyridine) and γ-glycidoxypropyltrimethoxysilane hydrolyzate coatings on poly(ethylene terephthalate) fiber substrates.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1986.051420102
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    Paper (German National Licenses)
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