Glass fiber (GF) reinforced plastic wood composite material
Polyvinyl chloride (PVC) wood-plastic composite material is a composite material made of PVC and wood fiber as the main raw materials. It has both the performance of wood materials and the thermoplastic processing performance of plastics. widely used. Its own high strength, strong flame retardancy, good resistance to harmful organisms and good corrosion resistance have become the first choice for use as structural materials, but this material also has poor flexural strength, poor impact strength, low heat distortion temperature and poor creep resistance. and other shortcomings that reduce the practicality. The traditional toughening modification of PVC is usually adding rubber-like elastomers to the resin, at the expense of reducing the valuable rigidity, heat resistance and dimensional stability of the material. At present, the most popular method in the world is to increase the mechanical properties without affecting the comprehensive properties by adding rigid toughening fibers. The use of glass fiber (GF) reinforced plastic wood composites can not only have good mechanical properties and friction and wear properties, but also have good fatigue resistance properties.
Adding a certain coupling agent or molding agent to the PVC composite material can improve the stability of the composite material to a certain extent. At the same time, the interfacial compatibility can be enhanced to improve the mechanical strength of the material, and it is obvious that more GF is retained in PVC, thereby increasing the aspect ratio of GF retained in PVC. When GF is not treated, insoluble substances are easily attached to the surface of GF, so that GF and PVC cannot be fully wetted. These two reasons directly lead to a substantial increase in the wear resistance and mechanical properties of the treated material.
By adding different contents of rice husk, GF and coupling agent γ-aminopropyltriethoxysilane (KH550) and titanate to the PVC/rice husk plastic-wood composite material, the scientists used the molding method to explore the GF and the effect of coupling agent content on the mechanical properties and friction and wear properties of wood-plastic composites. The effects of glass fiber (GF) content and coupling agent treatment on the mechanical properties and wear resistance of polyvinyl chloride (PVC)/rice husk plastic-wood composites were investigated by means of compression molding. The experimental results show that the hardness of PVC/rice husk plastic-wood composites first decreases and then increases with the increase of GF content. When the GF content is below 15%, with the increase of GF content, the tensile strength and impact strength of the wood-plastic composites generally increase, and when the GF content exceeds 15%, it decreases with the increase of GF content. The flexural strength first decreased and then increased, while the flexural modulus was the opposite. The wear resistance of the wood-plastic composite is the best when the GF content is 15%, and the friction coefficient is the highest when the friction coefficient is 10%. Appropriate coupling agent treatment can enhance the mechanical properties and wear resistance of wood-plastic composites. Among them, γ-aminopropyltriethoxysilane (KH550) has a better reinforcement effect, and titanate cannot improve the mechanical properties and wear resistance of PVC/rice husk plastic-wood materials.
After the above series of analysis and research links, we can further find that PVC materials are of great significance to our lives today. We should strengthen the research and analysis of such materials, and continue to carry out experimental research and improvement and update related product processing technology. Through these, the performance of the material is further improved. Continue to give full play to the positive role of PVC plastics in the environment and life, make good use of this material to improve our living environment, strengthen the recycling and utilization of PVC plastics, and improve the utilization rate of PVC plastics through these. Achieve environmental benefits and economic benefits The organic unity of benefits.
