Abstract
Several composites of a copolymer of ethylene and 1-octene, synthesized with a metallocene catalyst, have been prepared with a 5% in weight of different types of fiber. The effect of the fiber on the crystalline structure and on the viscoelastic response is analyzed. The role of the fiber on crystallite development is discussed based on WAXS, SAXS, optical microscopy and DSC experiments. The viscoelastic behavior is modified by incorporation of the fiber when compared with the plain copolymer. Thus, both the intensity and location of the γ, β and α relaxations are dependent on the introduction of the fiber. The β relaxation is assigned to the glass transition temperature, in agreement with the calorimetric results (DSC and MDSC) in the copolymer. Moreover, the stiffness is increased in the composites above the glass transition temperature of the copolymer, allowing the analysis of the viscoelastic behavior up to temperatures well inside the melting region of the copolymer crystals, and thus enlarging substantially the service temperature of these composites.
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Cerrada, M., Benavente, R., Zamfirova, G. et al. Influence of the Type of Fiber on the Structure and Viscoelastic Relaxations in Composites Based on a Metallocenic Ethylene-1-octene Copolymer. Polym J 34, 175–183 (2002). https://doi.org/10.1295/polymj.34.175
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DOI: https://doi.org/10.1295/polymj.34.175
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