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  • 1980-1984  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Colloid & polymer science 258 (1980), S. 42-50 
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Zusammenfassung Das thermomechanische Verhalten von mit einachsig verstreckten Faserstücken verstärktem Polymermaterial im Glasübergangsbereich ist Gegenstand der hier diskutierten Untersuchungen. Basierend auf strengen Theorien für die mechanischen Moduln und die Koeffizienten der thermischen Ausdehnung für viskoelastische Mischsubstanzen wurde analysiert, wie eine Einführung des Füllmaterials in die polymere Matrix zu einem Anstieg der Glastemperatur proportional zur Verstärkerwirkung des Füllers bewirkt. Das wird durch ein ausgiebiges experimentelles Material aus der Literatur bestätigt. Nur bei hochgefüllten Mischungen stört unvollständige Adhäsion die Verstärkerwirkung. Dies läßt sich auch dilatometrisch sowie auf zwei verschiedene andere Weisen mit mechanischen Testen zeigen.
    Notes: Summary The thermomechanical behaviour of polymeric matrices reinforced with long unidirectional fibres in their glass transition region was investigated. Based on rigorous theories for the mechanical moduli and the coefficients of thermal expansion for viscoelastic composites, it was proved analytically that the introduction of reinforcing fillers in polymeric matrices causes glass transition temperature to increase to an extent proportional to the reinforcing effect. This is confirmed by numerous experimental results available in the literature, except for highly-filled composites, where imperfect adhesion may counterbalance the reinforcing effect. Dilatometric as well as two different dynamic mechanical tests confirmed the latter. The variation of glass transition temperature as function of the various aspects of mechanical reinforcement was investigated.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Hoboken, NJ : Wiley-Blackwell
    Journal of Biomedical Materials Research 18 (1984), S. 413-425 
    ISSN: 0021-9304
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Medicine , Technology
    Notes: A complete study of the static and dynamic strength of complete maxillary dentures was undertaken. First, the denture base material was investigated in its various forms from the point of view of tension, creep, relaxation, fatigue, and the effect of a corrosive environment. Complete dentures were tested under static compression, and the distribution of stresses along the midline of the upper dentures was determined by means of strain rosettes and by reciprocating compression, the determination of their fatigue strength. The results were found to conform with experience as far as lifetime of complete dentures is concerned.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
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