Properties of composite polypropylene fibers for technical application
Department of Fibers and Textile Chemistry, Institute of Polymer Materials, Faculty of Chemical and Food Technology STU
a Department of Ceramics, Glass and Cement, Institute of Inorganic Chemistry, Technology and Materials, Faculty of Chemical and Food Technology STU, Radlinského 9, 812 37 Bratislava, Slovak Republic
b Research Institute for Man-Made Fibers, a.s., Štúrova 2, 059 21 Svit, Slovak Republic
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Abstract: This work focuses on the properties of polypropylene concentrates and fibers modified by inorganic additive. Polypropylene staple fibers are assigned as reinforcement of concrete to transform and absorb deformation energy. Modification of polypropylene fibers is necessary to ensure more intense anchoring of fibers in cement matrix. In this work the impact of inorganic additive on the rheological properties of polypropylene and polypropylene concentrate as well as on thermal, thermomechanical and mechanical properties of composite polypropylene fibers is investigated.
At rheological properties the index pseudoplasticity of polypropylene and polypropylene concentrates were comparable. Thermomechanical analysis shows, that temperature of fiber deformation was higher at higher drawing ratio of composite polypropylene fibers containing inorganic additives. Mechanical properties of modified fibers without stabilization and stabilized at 95°C for 1 minute achieved higher values at drawing ratio 4.0. Surface modification of fibers containing inorganic additives was noticeable.
Keywords: polypropylene fibers, modification, inorganic additive, rheological, thermal, thermomechanical and mechanical properties
Full paper in Portable Document Format: acs_0071.pdf
Acta Chimica Slovaca, Vol. 3, No. 2, 2010, pp. 84—92