| The filler is one of the important components in the rubber industry. Filler canmake the non-reinforcing rubber valuable in use and make it own other propertiesthrough improving the mechanical property of rubber. The performance of filler havean decisive influence on the processability and end products property of the polymersystem. Meanwhile there are a great variety of filler which make the study of fillerbecome one of the main direction in the development of the application of rubber.According to the shape, filler can be classified as granular, fibrous and flake filler, etc.Fibrous filler usually covers all kinds of short fibers which the slenderness ratio is100～200mm and the length is3～5mm. Short fiber-rubber composites (SFRC) havethe performance of high modulus， fight spurs firm， high tear strength andanisotropy， because of the good combination of the flexiblility of rubber and therigidity of short fiber.This thesis studied the influence of the short fiber type， dosage， formulationdesign， compatibility and HRH system on short-rubber properties.Firstly， take nylon short fiber， aramid short fiber， blue cotton short fiber andpolyester short fiber for examles, a study was made on the influence of kind of shortfibers on physical, heat aging and resistance properties of short fiber-CR composites.The experiment results showed that added same number and different types of shortfiber composite tensile strength are lower than without adding short fiber rubber; tearstrength comparison, domestic nylon fiber reinforced composites is strongest and bluecotton short fiber is less than not containing fiber rubber that is the weakest; agingresistant performance comparison, aramid> domestic nylon,nylon66> polyester shortfiber> blue cotton short fiber; DIN wear test shows, nylon66is better than aramidshort fiber, blue cotton short fiber is the worst. Secondly, in view of short fiber is difficult to disperse in the rubber, KDP-100was added in the composite to modify materials, testing its mechanical properties,dynamic mechanical, wear properties and using SEM micrographs of differentmaterials section structure. The result showed that, KDP-100are both improved shortfiber dispersion and rubber plasticization. Added2phr KDP-100can increase theamount of domestic nylon or nylon66short fiber in the rubber dispersion. When thefibers increase in the number of copies, KDP-100soften the effect of plasticizer oncomposite. Peak of loss factor in adding short fiber composites decreased, which lowerthe maximum is nylon66short fiber composite, followed by the aramid fibercomposite, blue cotton short fiber minimal effect on rubber. Also in adding the fibermaterial after the loss factor of glass transition temperature is slightly shifted to lowertemperature.Thirdly, short fiber surface is inert generally and adhesive difference with rubber.This experiment by adding binder in the form of composite is material modification.The results show that added the HRH system, the tensile strength of compositesincreased and elongation at break decrease. Silica gel for easy to rubber hardening, thematerial sample hardness higher than that of not containing HRH system composites.DIN abrasion value of aramid and nylon66short fiber reinforced materials declinewhen adding HRH system, but blue cotton and polyester short fiber composites DINabrasion value rise. Through the dynamic viscoelastic test, peak of loss factor of allkind of fiber material to further reduce when adding HRH system. |
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