Study on the Properties of SiO2 Nanoparticles Reinforced PVC Cable Materials
Silicon dioxide(SiO2)nanoparticles were modified using aminosilane coupling agents(GAS),and the modified SiO2 nanoparticles were used to enhance the dielectric and mechanical properties of PVC nanocomposites.The effects of the addition of modified SiO2 nanoparticles on them were studied.The results showed that with the increase of modified SiO2,the relative dielectric constant of PVC composites shows a trend of first decreasing and then increasing,and reaches the lowest value of 2.97 at 1.5%addition,which is 26.12%lower than that of pure PVC materials.The breakdown strength of PVC composites shows a trend of first increasing and then decreasing under both direct current and branch electric fields,with the highest breakdown strength reached at a addition of 1.0%.The breakdown strength under direct current and branch electric field conditions is 70.21,60.12 kV/mm,respectively,and the breakdown strength of pure PVC materials has increased by 20.48%and 30.36%,respectively.In addition,at a addtion of 1.0%,the tensile strength,flexural strength and elongation at break of PVC composites are 49.33 MPa,92.67 MPa and 187.34%,respectively.
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