THERMOMECHANICAL AND MECHANICAL PROPERTIES OF MODIFIED POLYPROPYLENE FIBERS

摘要

This work was aimed to study the properties of polypropylene (PP) fibers modified by inorganic additives, assigned for improve the end-used properties of construction composites based on silica. Modification of fibers by addition of sufficient additive insure more intense anchoring of polypropylene fibers in cement matrix, what leads to expressive improve of functional of PP fibers in relation to transmission and absorption of deformation energy at mould and load silica composites. Impact of inorganic additives on the thermomechanical and mechanical properties of fibers, and the compatibility of individual components are investigated. Thermomechanical properties of modified polypropylene fibers were evaluated by thermomechanical analysis (TMA). From obtained dependences, temperature of fiber shrinkage and total shrinkage of fibers containing inorganic additives were found to be lower than at specimens of standard fiber. Mechanical properties of fibers were study by investigation of characteristics as strength and Young's module of fibers with and without stabilization.