How to improve the mechanical properties and heat resistance of direct zinc oxide when producing plastics?
Publish Time: 2025-01-06
Direct zinc oxide has multiple functions in plastic production, including enhancing mechanical properties and improving heat resistance.
1. Improvement of mechanical properties
Filling reinforcement: As an inorganic filler, direct zinc oxide can be added to the plastic matrix to enhance the mechanical properties of the plastic through the filling effect. Zinc oxide particles can be dispersed in the plastic matrix to form a uniform reinforcement network, improving the strength and toughness of the plastic.
Interface modification: The interface compatibility between zinc oxide particles and the plastic matrix can be improved through surface treatment or the use of coupling agents. This helps to improve the bonding strength between the filler and the matrix, thereby improving the tensile strength, bending strength and impact strength of the plastic.
Particle size control: Controlling the particle size distribution of zinc oxide particles and selecting an appropriate particle size range (usually at the nanometer or micrometer level) can optimize the dispersion and reinforcement effect of the filler. Finer particles can better fill the micropores and defects in the matrix and improve the mechanical properties.
2. Improved heat resistance
Enhanced thermal stability: direct zinc oxide has excellent thermal stability and can improve the heat resistance of plastics. Zinc oxide will not decompose or fail at high temperatures, and can be used as a heat stabilizer to delay the degradation of plastics at high temperatures.
Enhanced flame retardancy: zinc oxide has certain flame retardant properties and can be added to plastics as a flame retardant. Zinc oxide can absorb heat and inhibit the spread of flames, thereby improving the flame retardancy and heat resistance of plastics.
Improved thermal conductivity: zinc oxide has high thermal conductivity and can improve the thermal conductivity of plastics. By adding zinc oxide, the thermal management ability of plastics in high temperature environments can be improved, and thermal stress and thermal deformation can be reduced.
3. Processing technology optimization
Mixing process: During the plastic processing process, zinc oxide can be evenly dispersed into the plastic matrix by using an appropriate mixing process (such as a twin-screw extruder). Uniform dispersion can maximize the reinforcing effect of the filler while avoiding agglomeration and local stress concentration.
Processing temperature control: Control the processing temperature to avoid excessively high temperatures that cause the decomposition of zinc oxide particles or the degradation of the plastic matrix. Appropriate processing temperature can ensure the stability and reinforcement effect of zinc oxide.
4. Formula optimization
Composite fillers: Combined with other inorganic fillers (such as calcium carbonate, glass fiber, etc.) or organic reinforcing agents (such as polyamide, polyester, etc.), the mechanical properties and heat resistance of plastics can be further optimized. Composite fillers can work synergistically to provide more comprehensive performance improvements.
Use of coupling agents: The use of coupling agents (such as silane coupling agents, titanate coupling agents, etc.) can improve the interface bonding between zinc oxide particles and plastic matrix, and improve the reinforcing effect and heat resistance of fillers.
Through various methods such as filling reinforcement, interface modification, particle size control, thermal stability enhancement, flame retardancy enhancement, thermal conductivity enhancement, processing technology optimization and formula optimization, direct zinc oxide can effectively improve its mechanical properties and heat resistance in plastic production. The comprehensive application of these strategies can provide plastic products with higher strength, toughness and heat resistance to meet various application requirements.
