Preparation And Properties Of High-performance Conductive Engineering Plastic

Conductive polymers in recent years has aroused great concern. The research and production of polymer insulator Promote the development of polymer industry in the past, the rapid development of electronic information industry and the aviation industry, it requires have good processing properties and special performance which contains light, electricity, magnetism, sound and so on. People regard semiconductors, conductors, as well as superconductor research more and more.It based on the research of our group the Composites were prepared by melt-blending method, the nano-Fe3O4, glass fiber and carbon fiber as reinforcing and toughening filler. We investigate the microstructure, conductivity, crystallinity and mechanical properties of the materials, and study the performance when the expanded graphite and carbon fiber were added to the different polymer.1.Preparation and properties of PA6/EG/nano-Fe3O4 compositesPA6/EG/nano-Fe3O4 composites were prepared by melt blending, as the nano-Fe3O4 has the electrical properties.nano-Fe3O4 and expanded graphite can increase the conductivity of composite materials, its nano effect can improve mechanical properties composites, when the nano-Fe3O4 content is 3phr, the conductive properties of materials unchange and the effective improvement of the mechanical, the flexural strength and impact strength were 95.45MPa and 19.23kJ/m2. DMA, DSC, XRD and TG were used to study of the Dynamic mechanical properties, the crystallization, thermal properties and so on of the PA6 conductive composites because of nano-Fe3O4.2.Preparation and properties of PA6/EG/GF compositesPA6/EG/GF conductive composites were prepared by melt blending, the expanded graphite were prepared by high temperature expansion. to study the conductive properties, mechanical properties and water absorption effects when glass fiber add to PA6/EG conductive composites. The results showed that the addition of glass fiber reduce the conductivity of the composites and improve the mechanical properties and water absorption.Meanwhile, DSC, XRD, DMA and other means were used to study the crystallization properties, dynamic mechanical properties and so on of PA6/EG/GF composites, GF did not change the crystal of PA6, but affect its speed of crystallization, while the storage modulus and glass transition temperature were improved with the increase of GF content.3.Preparation and properties of PA6/EG/CF compositesPA6/EG/CF conductive composites were prepared by melt blending,carbon fiber has excellent conductive properties and mechanical properties, to study the conductive properties, mechanical properties and morphology when carbon fiber add to PA6/EG conductive composites, The results showed that the addition of carbon fiber improve the conductivity properties and the tensile, bending,impact properties of composites. DSC, XRD, DMA and permittivity test apparatus were used to study the crystallization properties, dynamic mechanical properties, the dielectric properties and so on by means of CF. The results showed that, the crystalline of PA6 did not change because of CF, but its crystallization rate and crystallinity changed, the storage modulus and glass transition temperature increased and decreased with the increase of CF content respectively. While the addition of CF increased dielectric constant,dielectric loss and water resistance of materials.4. Preparation and properties of expanded graphite,carbon fiber conductive composites with different polymerPA6, PET, PPS three kinds of resin were respectively melted blending with expanded graphite and carbon fiber, to study the interface bonding of CF and the polymer by electrical conductivity, mechanical properties, SEM. the conductivity changed little, mechanical properties increased the different range of different polymer. DSC, XRD, DMA and other testing methods were used to study the crystallization properties, dynamic mechanical properties of different polymer with carbon fiber. The results showed that the crystalline of the three kinds of resins did not change by CF, but their crystallization degree and speed changed,the influence of dynamic mechanical properties and glass transition temperature was different with different polymer.