Structure And Property Research Of HNBR/Micro-Nano Fibers Composites

This research innovationally adopted the techniques to substitute the traditional reinforced organic short fibers with crude silicate nano-fibers in the automotive V-belt according to the developing trends of high performance and long life. The paper put much importance on the interficial design between the sibers and the rubber matrix. The primary achivement of this paper focused on the relationship that how the micro-structures and properties of the HNBR/FS composite were influenced by the dosage of FS filler. And also how the micro-structures and properties of the HNBR/DCAF/FS composite were influenced by the dosage and size of FS and DCAF.For the composites with HNBR matrix cured by phenolic resin, most FS granule could be dissolve into nano-fiber and dispered well in the rubber matrix, the mechanical properties were excellent while the FS were cured by the coupling agent KH-570, the optimal dosage of KH-570 was around 4-6phr/40phrFS.Similar with the stress-strain behavior of rubber reinforced with short fiber,the HNBR/FS composite and the HNBR/DCAF/FS composite presentedhigh modulus, high stress and low elongation. HNBR/DCAF/FS compositeput up yield phenomenon while the content of the DCAF was high.The oriented composite processed by intense shear possessed obviousmechanical anisotropism, which could be enhanced by the incraesingdosage of FS and DCAF, whereas, the mechanical anisotropism weakenedwhile the dosage of FS was too high.FS which dispered in the matrix created remarkable filler network,resulting filler network effect exhibited by the increaseing of the storagemodulus of the compound. The filler network effect was enhanced by theincreasing of the dosage of fillers. The storage modulus of HNBR/FScomposite was lower than the HNBR/DCAF/FS composite while the samevolume content of fillers were used.Compared to HNBR/FS composite, HNBR/DCAF/FS composite showedbetter machanical properties, more obvious anisotropism, and worseflexibility abrasion resistance, mechanical properties maintenance underhigh temperature. DCAF was a advantaged factor for decreasing the lossfactor tand of the composite, and the tand keep decreasing while the dosageand the aspect ratio of the DCAF increased.