Construction of ZDMA@Si3N4 Hybrids by Modifying Si3N4 with ZDMA:Preparation and Properties Research of ZDMA@Si3N4/EPDM Composites
ZDMA@Si3N4/EPDM Composites were prepared using ceramic nano-silicon nitride(n-Si3N4)powder,modi-fied with zinc dimethacrylate(ZDMA)by wet modification treatment.In this paper,the effects of ZDMA@Si3N4 on the mechanical properties,wear resistance and oil resistance of the composites were investigated.The experimental results show that ZDMA has a good organic surface modification effect on Si3N4 and improves its dispersion in the EPDM matrix.At the same time,the unsaturated bonds in the structure of the composite material form co-sulphuration with the rubber macromolecular chain,which effectively improves the cross-linking density and polarity,and ZDMA and Si3N4 achieve good synergistic effects.When ZDMA@Si3N4 is added at 15 phr,the tensile and tear strength of the ZDMA@Si3N4/EPDM composites are increased by 24.2％and 42.8％,respectively,the Akron abrasion loss is reduced from 0.52 cm3/1.6 km to 0.14 cm3/1.6 km,and the mass change rate after hot oil aging at 100℃ for 70 h is reduced from 102％to 87％.
nano-silicon nitridemodificationcomposite material
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