Polysiloxane is a class of polymer compounds with special chemical structures and properties. They are mainly composed of silicon-oxygen (Si-O) chains, in which silicon atoms and oxygen atoms are alternately connected, and organic groups are connected to silicon atoms. Polysiloxane is widely used in many fields due to its unique chemical and physical properties.
The role of polysiloxane as a coupling agent
1. Improve interfacial adhesion
Polysiloxane coupling agents can effectively improve the adhesion between inorganic materials (such as glass fibers, fillers) and organic matrices (such as polymers), which helps to improve the mechanical properties and durability of composite materials.
2. Improve the weather resistance of materials
At the interface between polymers and fillers, polysiloxane coupling agents can provide good water resistance, chemical corrosion resistance and UV resistance, thereby improving the weather resistance and long-term stability of the final material.
3. Reduce moisture absorption of materials
Polysiloxane coupling agents have excellent hydrophobicity, which can effectively reduce moisture absorption of composite materials and prevent moisture from negatively affecting material properties.
4. Optimize material processing properties
During the production process, polysiloxane coupling agents can improve mixing, dispersion and processing properties, allowing fillers and matrix materials to be more evenly distributed.
Application fields
1. Composite materials
2. Coatings and adhesives
3. Electronic packaging materials
4. Medical materials
Common types
1. Coupling agents
Coupling agents are a common form of polysiloxane coupling agents, usually with one or more active groups that can react with hydroxyl groups on the surface of inorganic materials to form stable chemical bonds.
2. Siloxane polymers
These polymers can form a network structure in the matrix of the composite material, further improving the interfacial adhesion and mechanical properties of the material.
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