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The main applications and characteristics of coupling agents in the field of polymer materials
Release Date:
2024-08-05
Coupling agents play a crucial role in the preparation and application of polymer materials. They are like magical bridges that tightly connect polymer materials with other inorganic or organic components, endowing the materials with superior performance.
Coupling agents are a class of compounds with amphiphilic structures, where one end of their molecule can react with chemical groups on the surface of inorganic materials such as glass fibers, white carbon black, calcium carbonate, etc., forming reinforced bonds; The other end can undergo chemical reactions or physical entanglement with organic polymer materials (such as plastics, rubber, resins, etc.), effectively combining the two materials with vastly different properties together.
When selecting and using coupling agents, several important material parameters need to be considered. Different types of functional groups have varying reactivity and compatibility with different polymer materials and inorganic fillers. Hydrolysis stability can affect the effectiveness and storage stability of coupling agents during use. The amount of coupling agent used is not necessarily better, there is usually an optimal dosage range, and excessive use may lead to side effects. The thermal stability of coupling agents is crucial for polymer materials used under high-temperature processing conditions.
The application of coupling agents is very extensive. In the plastic industry, adding talc powder treated with coupling agents to polyethylene (PE) can improve its rigidity, heat resistance, and dimensional stability, making it more suitable for manufacturing plastic products such as plastic films, pipes, etc.
In the composite material of polystyrene (PS) and glass fiber, the use of appropriate coupling agents can significantly improve the strength and impact toughness of the material, which is applied to products such as household appliance casings. In the rubber industry, coupling agents can enhance the interaction between carbon black and rubber molecules in the combination of natural rubber and carbon black, improve the wear resistance and tensile strength of rubber, and are widely used in tire manufacturing.
Adding white carbon black treated with coupling agents to rubber can improve its oil resistance and aging resistance, and is used for manufacturing oil seals, seals, etc. In the coatings industry, the use of coupling agents in water-based coatings can improve the dispersion and stability of pigments, enhance the adhesion and weather resistance of coatings. Adding coupling agents to epoxy coatings can enhance the adhesion between the coating and the metal substrate, and improve the anti-corrosion performance.
In the adhesive industry, coupling agents can improve the bonding strength of epoxy adhesives to materials such as metals and ceramics, expanding their application range. In the composite system of polyurethane adhesive and inorganic filler, coupling agent helps to improve the comprehensive performance of the adhesive.
Polymer coupling agents, as important additives in the field of materials science, play an indispensable role in improving the performance of polymer materials and expanding their application areas. With the continuous development and innovation of materials science, the research and application of coupling agents will also continue to deepen and expand.
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