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Brief description of the characteristics, manufacturing process and use of polyvinylidene fluoride
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2024-03-11
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Characteristics of 1. polyvinylidene fluoride
Polyvinylidene fluoride (PVDF) is a highly engineered fluoropolymer with the following notable properties:
Chemical stability: PVDF exhibits excellent corrosion resistance to most chemicals and solvents, including strong acids, strong bases, oxidants and organic solvents.
Thermal stability: Its long-term use temperature range is wide, and it can withstand high temperatures up to about 175°C in a short time, while the continuous working temperature is usually around 150°C.
Mechanical properties: PVDF material has high strength, high hardness and good toughness, and its tensile strength and impact resistance are better than many other plastics.
Electrical properties: PVDF is an excellent electrical insulation material with low dielectric constant, low dielectric loss and good dielectric strength.
Physical properties: It has a low coefficient of friction, non-stick and self-lubricating, while wear resistance, weather resistance, resistance to ultraviolet and atmospheric aging ability is outstanding.
Process of 2. Polyvinylidene Fluoride
Production process: catalyzed by free radical or ionic initiator, the vinylidene fluoride (VDF) monomer is homopolymerized or copolymerized with other fluorine-containing monomers. The process can be solution polymerization, suspension polymerization or emulsion polymerization.
Processing and molding: PVDF can be processed into products of different shapes by extrusion, injection molding, molding, transfer molding and other methods, such as films, pipes, plates, bars, profiles and various customized parts.
Modification: The performance of PVDF can be further optimized by filling, blending, surface treatment, etc., such as improving heat resistance, enhancing mechanical properties or changing its surface properties.
Use of 3. polyvinylidene fluoride
Chemical anti-corrosion field: used for pipelines, valves, pumps, tank lining, and various corrosion-resistant structural parts in chemical plants.
Electrical and electronic industry: as the insulation material of wire and cable, semiconductor packaging material, connector shell and high-frequency signal transmission line sheath material.
Building materials: used for exterior wall coatings, waterproof membrane, roof covering, etc., because of its superior weathering resistance.
Environmental protection filtration: production of efficient filter membrane and filter bag, used in water treatment, air cleaning, drug purification and other fields.
Energy field: it plays an important role in solar battery back sheet and lithium ion battery separator, taking advantage of its excellent insulation and chemical resistance.
Functional materials: Based on their ferroelectric and piezoelectric properties, they can be made into piezoelectric devices, sensor elements and actuator components, which are widely used in ultrasonic transducers, microelectromechanical systems (MEMS), medical devices and other fields.
Special coating: applied to metal or other substrates to form a protective layer resistant to abrasion and chemical attack.
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