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  • 1
    Electronic Resource
    Electronic Resource
    Frictional properties of maxillofacial prosthetic elastomers (1994)
    Springer
    Journal of materials science 5 (1994), S. 25-28 
    Details
    ISSN: 1573-4838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine , Technology
    Notes: An investigation was made of the surface characteristics of two silicone base maxillofacial prosthetic materials, in terms of surface roughness and coefficient of friction, in order to compare these characteristics with those of human skin. Both elastomers were found to display lower frictional coefficient than the human skin and their surface texture did not seem to have an effect on these results. Oxidative treatment of the silicon surface increases the value of the frictional coefficient, probably due to the adsorption of atmospheric moisture.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00121149
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  • 2
    Electronic Resource
    Electronic Resource
    Synthesis and properties (1999)
    Springer
    Journal of materials science 10 (1999), S. 29-33 
    Details
    ISSN: 1573-4838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine , Technology
    Notes: Abstract Poly(D,L lactic acid) was prepared by bulk polymerization of D,L lactide, both under atmospheric pressure and in vacuum. The obtained polymeric products were characterized in terms of molecular weight, Mw, melting point, calorimetric response and swelling behaviour. All products were amorphous. Their molecular weights were determined by viscosimetry and ranged from 2×103 to 9×104. Similarly, the melting points ranged from 90 to 210°C. Swelling experiments, with specimens immersed in buffer solutions, showed that hydrolytic degradation started in a few days for the low Mw material, whereas for the higher molecular weight products it took much longer and probably followed a two-stage mechanism. This study suggests that the high molecular weight material could be an interesting carrier for the preparation of controlled release products, in cases where prolonged delivery is necessary. © 1999 Kluwer Academic Publishers
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008887910068
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Rubber-modified polymer composites (1987)
    Springer
    Journal of materials science 22 (1987), S. 3417-3420 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The effect of rubber modification on the mechanical properties of a polymer composite consisting of polymethyl methacrylate (PMMA) beads embedded in a PMMA matrix was studied. The synthetic rubber used, a styrene-butadiene copolymer (SBR), was dissolved after mastication into the methyl methacrylate monomer, thus ensuring that rubber dispersion takes place in the matrix phase. The results obtained show that the mechanical properties of the rubber-modified material produced by the technique described are greatly dependent on the total rubber content, since it affects the form and particle size of the dispersed phase.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01161214
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Reinforcement of acrylic polymers with radiopaque cellulose fibres (1992)
    Springer
    Journal of materials science 27 (1992), S. 734-736 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The incorporation of BaSO4 containing cotton threads into acrylic matrices was studied, as a means of reinforcing the polymer and producing radiopacity at the same time. Coating the threads with a thin poly(vinyl acetate) film containing BaSO4 was defined as the most suitable method, providing strength and wettability to the fibres. A percentage of about 10 p.h.r. fibres can be characterized as satisfactory for both objectives, i.e. radiopacity and reinforcement.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02403887
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Treated polyethylene fibres as reinforcement for epoxy resins (1993)
    Springer
    Journal of materials science 28 (1993), S. 5002-5006 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Ultra-high-modulus polyethylene (UHMPE) fibres were treated in order to develop favourable surface and, possibly, microstructure characteristics. The main aim was to eliminate the microfibrillar morphology of the fibre and improve interfacial bonding between fibre/matrix so that better compressive properties can be achieved in reinforced resins. Calendering at 130 °C was performed, and the surface treatment used oxidative solutions. Adhesive bonding to epoxy matrices was highly improved in chromosulphate-treated material exceeding that of a commercial, corona-treated product, but the mechanical properties of these fibres deteriorated. Calendering did not significantly affect fibre strength and only improved adhesive bonding slightly. The use of these treated reinforcements is expected to improve the performance of composite materials, especially at low fibre volume fractions, because of their improved interfacial characteristics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00361168
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  • 6
    Electronic Resource
    Electronic Resource
    Reinforcement of acrylic polymers with radiopaque cellulose fibres (1992)
    Springer
    Journal of materials science 27 (1992), S. 734-736 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The incorporation of BaSO4 containing cotton threads into acrylic matrices was studied, as a means of reinforcing the polymer and producing radiopacity at the same time. Coating the threads with a thin poly(vinyl acetate) film containing BaSO4 was defined as the most suitable method, providing strength and wettability to the fibres. A percentage of about 10 p.h.r. fibres can be characterized as satisfactory for both objectives, i.e. radiopacity and reinforcement.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00554044
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    Preparation and study of aramid/epoxy prepregs (1995)
    Springer
    Journal of materials science 30 (1995), S. 2159-2162 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Solid epoxy resin compounds were studied for their suitability as matrices for the preparation and curing of prepregs containing aramid fibres. Acid anhydrides were shown to be incompatible to the epoxy resin, producing a dispersed crystalline phase upon drying, whereas o-phenylenediamine is a miscible cross-linking agent. Also, diamine is safer because it reacts with the epoxy at temperatures considerably higher than the anhydrides. Composite specimens prepared by these prepregs display similar tensile strength and lower modulus than those derived from the one-step process, by the use of conventional liquid epoxy systems.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00353049
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    Paper (German National Licenses)
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  • 8
    Electronic Resource
    Electronic Resource
    Plasticization of acrylic resins (1985)
    Springer
    Journal of materials science 4 (1985), S. 293-295 
    Details
    ISSN: 1573-4811
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00719794
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  • 9
    Electronic Resource
    Electronic Resource
    Exothermic effect during polymerization of polymethyl methacrylate (1985)
    Springer
    Journal of materials science 4 (1985), S. 691-693 
    Details
    ISSN: 1573-4811
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00726963
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    Paper (German National Licenses)
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  • 10
    Electronic Resource
    Electronic Resource
    Reinforced cyanoacrylates as repair materials (1988)
    Springer
    Journal of materials science 7 (1988), S. 13-14 
    Details
    ISSN: 1573-4811
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01729900
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