电缆保护管用HDPE/AMWs复合材料的制备与性能研究OA

To improve the performance of high-density polyethylene(HDPE)cable protection pipes and promote the high-value utilization of artificial marble waste residues(AMWs),HDPE-based composites were prepared via melt blending and injection molding.The microstructure,crystallization behavior,mechanical properties,thermal deformation,and electrical insulation performance were systematically characterized.The results showed that the organic layer on the surface of AMWs could serve as heterogeneous nucleation sites,significantly regulating the crystallization of HDPE.At a filler loading of 50 phr,the HDPE/AMWs composites achieved a crystallinity as high as 88.5%,with a tensile strength of 23.3 MPa,which was higher than that of the CaCO3 system at the same loading.In terms of thermal properties,the AMWs system exhibited better thermal deformation performance at low and medium filler loadings.At a filler loading of 70 phr,the CaCO3 system showed a heat deflection temperature of 91.3℃and a flexural modulus of 2 341 MPa,indicating superior resistance to high-temperature deformation and higher rigidity.Regarding electrical properties,both composite systems at a filler loading of 70 phr exhibited volume resistivities above 1.60×1013 Ω·m and stable breakdown strengths of around 22 kV/mm,meeting the insulation requirements for cable protection pipes.In conclusion,AMWs can enhance the tensile strength and thermal stability at low and medium filler loadings through induced crystallization,while maintaining good insulation performance.This demonstrates their potential to replace CaCO3 in the preparation of high-performance cable protection pipe materials.