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Mechanical properties of the short-polyester-fiber-reinforced polyurethane elastomer composite with and without different bonding agents were studied. It was found that the properties depend on the orientation and concentration of fibers. Properties such as tensile strength, modulus, and tear strength increase with the increase of fiber loading, whereas the rate of increase of abrasion loss decreases with fiber loading. The bonding agent, MD resin, was found to increase the mechanical properties of the composite. Initial properties of a composite containing a bonding agent based on glycerol (GL) and 4,4′ diphenyl methane diisocyanate (MDI) were found to be better, whereas the retention of mechanical properties after aging was found to be good for the composite containing a bonding agent based on a 1:1 combination of polypropylene glycol (PPG) and polypropylene glycol-glycerol mixture with MDI.
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Suhara et al. (1998) studied this question.
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