How to improve the mechanical properties and chemical resistance of engineering plastic sheet and bar?
Improving the mechanical properties and chemical resistance of engineering plastic sheet and bar can be done in the following ways:
Adding fillers: By adding inorganic or filler materials, such as glass fibre, carbon fibre, particles, etc. to the plastic matrix, the strength, hardness and high temperature resistance of engineering plastics can be effectively improved.
Blending modification: engineering plastics are physically mixed with other resins or additives to improve their specific properties. For example, adding PBT can enhance the heat resistance, rigidity and dimensional stability of PET; adding elastomer can improve the toughness and impact resistance of PET.
Copolymerisation: By changing the molecular chain structure of engineering plastics and introducing new monomers for copolymerisation, materials can be given more special functions. For example, by copolymerisation with monomers with polar functional groups, the surface polarity of engineering plastics can be improved, enhancing their printing performance and adhesive properties.
Surface modification: surface treatment of engineering plastics, such as plasma treatment, grafting modification, coating modification, etc., can significantly improve its compatibility with other materials and adhesive properties, or to give it anti-static, anti-fog and other functional properties
Crystalline modification: regulating the crystallisation process of engineering plastics, including controlling the crystallisation rate, crystal type, grain size, etc., can significantly affect their mechanical properties, optical properties and thermal properties. For example, rapid cooling induces the formation of microcrystalline structures, which can increase the barrier properties of the film.
Use of high-performance resins: Selection of higher performance resin materials, such as PEI (polyetherimide), PEEK (polyether ether ketone), etc., these materials in high temperature, high humidity, chemical corrosion and other harsh environments can still maintain excellent mechanical properties and chemical resistance.
Enhance the chemical stability of the material: through chemical modification, such as the addition of ultraviolet absorbers, etc., to improve the weathering and chemical resistance of engineering plastics, so that in a variety of chemical erosion can still maintain stability and reliability
Multi-layer composite structure: By composite materials with different properties together to form a multi-layer structure, it can balance the relationship between filtration efficiency, resistance and chemical resistance, and improve the comprehensive performance of the filter membrane.
