Overview
Silane cross-linkable compounds are materials that contain functional groups capable of reacting with silane coupling agents to form cross-links. This cross-linking process enhances the material’s properties and performance.
Composition
Silane cross-linkable compounds typically consist of a base polymer or resin along with silane coupling agents and other additives such as fillers, stabilizers, and processing aids.
Cross-Linking Process
The cross-linking process involves the following steps:
- Preparation: Silane coupling agents are mixed with the base polymer during compounding.
- Activation: The silane functional groups react with moisture to form silanol groups on the polymer surface.
- Cross-Linking: The silanol groups undergo condensation reactions with other silanol groups or with silane molecules, forming covalent bonds and cross-links between polymer chains.
- Curing: The cross-linked polymer is cured using heat, radiation, or chemical initiators to complete the cross-linking process.
Properties
Silane cross-linkable compounds offer several enhanced properties:
- Improved Mechanical Strength
- Enhanced Chemical Resistance
- Greater Thermal Stability
- Reduced Permeability
- Increased Weatherability
- Enhanced Adhesion
Applications
Silane cross-linkable compounds are used in various applications across industries:
- Wire and Cable Insulation
- Pipe and Tubing
- Automotive Parts
- Building Materials
- Adhesives and Sealants
- Tire Manufacturing
Environmental Considerations
Silane cross-linkable compounds can contribute to sustainability efforts by improving the durability and lifespan of materials, reducing the need for frequent replacements.