VSE knjižnice (vzajemna bibliografsko-kataložna baza podatkov COBIB.SI)
  • Properties of laboratory manufactured polypropylene fibers
    Gregor-Svetec, Diana ; Malej-Kveder, Sonja
    Polypropylene fibers are finding increasing use in a wide range of industrial applications, where beside high tenacity high modulus is a desirable property. Laboratory melt-spun polypropylene fibers ... with higher tenacity and elastic moduli have been manufactured in a continuous drawing process, while the subsequent discontinuous drawing at 145 oC lead to the high-modulus fiber. The influence of fiber grade PP polymer, plastic grade PP polymer and a blend of both polymers on mechanical properties of produced fibers has been investigated. It is evident from the study that the mechanical properties of continuously drawn fibers are mainly determined by average molecular orientation. Fiber spun from a high molecular weight polymer exhibits the highest value of dynamic and static elastic modulus as a consequence of the highest average molecular orientation and high degree of crystallinity. The crystallinity of the fiber spun from a fiber grade CR-polymer is lower than the one of the fiber spun from a plastic grade polymer. Nevertheless, high molecular orientation of both fibers results in about equal value of elastic modulus and in higher tenacity of the fiber spun from the fiber grade CR-polymer. The fiber spun from the blend of both polymers is the most crystalline among all three samples, but his tenacity and elastic modulus are low because of low average molecular orientation. Results of the research show that the laboratory manufactured polypropylene fibersfrom the fiber gradeCR-polymer and the plastic grade polymer at defined processing conditions exceed usual textile-technological properties of polypropylene textile fibers and are suitable for industrial applications.
    Vir: Kunststoffe : Synthese, Verarbeitung, Charakterisierung : Workshop, Schloss Seggau, 5. & 6. Oktober 1995 (Str. 30)
    Vrsta gradiva - prispevek na konferenci
    Leto - 1995
    Jezik - angleški
    COBISS.SI-ID - 439664

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