Wear Resistance and Mechanical Properties of Polymeric Fibers Filled with Inorganic Fillers
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Wear Resistance and Mechanical Properties of Polymeric Fibers Filled with Inorganic Fillers Toshihira Irisawa1, Masatoshi Shioya2, Haruki Kobayashi2, and Junichi Kaneko3 1 Department of Polymeric materials, Tokyo Institute of Technology, 2-12-1 Ookayama,Meguroku, Tokyo, 152-8550, Japan 2 Tokyo Institute of Technology, Tokyo, 152-8550, Japan 3 Nippon Felt Co.,Ltd., Saitama, 115-0055, Japan
ABSTRACT The wear resistance and the mechanical properties of polymer matrix composite fibers filled with inorganic fillers have been investigated in order to find out the way to increase the wear resistance of the fibers without losing tensile modulus and strength. Nylon 6 and poly(ethylene terephthalate) have been used as the matrix polymer and aluminum borate whisker and carbon nanotube have been used as the fillers. The wear resistance of the fibers has been evaluated by observing the fiber cross section after the side of the fiber was worn using a rotating drum covered with abrasive paper. The wear resistance of the nylon 6 and PET fibers was increased by the addition of these fillers without the loss of tensile modulus and strength. The effects of the addition of the fillers on the wear resistance have been compared with the effects of stretching and heat treatment of the fibers.
INTRODUCTION Utilization of polymeric materials in place of metals for the parts used in frictional environments is increasing from the view point of making the lubrication unnecessary and reducing weight. Although some types of polymeric materials, for example, the urethane elastomers, show excellent wear resistance when used in the frictional environments, they are insufficient in the fields which require materials with high tensile modulus and strength. One example is the paper-making belt used in the paper mill. The filaments used for the papermaking belt need to have high tensile modulus and strength as well as good wear resistance since these filaments should sustain large tension which arises when the belt is driven at a high speed. This study has been performed to investigate the suitability of the polymer matrix composite fibers filled with inorganic fillers for such purposes. A number of studies have been performed so far on the wear resistance of polymer matrix composites filled with inorganic fillers. It has been discussed by Lancaster that the fillers support load in the wear surface and if the interfacial bonding between the fillers and the matrix is sufficiently large, the addition of the fillers increases the wear resistance of the polymeric materials [2-3]. The content, size and orientation of the fillers have significant influences on the wear resistance [4-6]. Recently, nanosized fillers are gaining attention as the fillers of the composites and the wear resistance of the nanocomposites has been investigated [7-9]. Most of these studies, however, treated adhesive wear of the film and bulk specimens. In this study, the
effects of the addition of inorganic fillers to the polymeric fibers on the wear resistance and o
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