Overview
1,1-Difluoroethylene (VDF) is a fluorinated hydrocarbon primarily used as a monomer in the production of polyvinylidene fluoride (PVDF), a high-performance polymer. PVDF is valued for its chemical resistance, thermal stability, and piezoelectric properties, making it ideal for applications in aerospace, electronics, and chemical processing industries. VDF is also employed in the synthesis of refrigerants and other fluorinated compounds. Due to its high reactivity and flammability, it requires careful handling and storage under controlled conditions to prevent accidents.
Physical and Chemical Properties
1,1-Difluoroethylene is a colorless gas with a faint ether-like odor. It has a low boiling point (-85.7°C) and melting point (-144°C), which classify it as a cryogenic substance. Its density as a liquid at the boiling point is 1.14 g/cm³, and it is slightly soluble in water but miscible with most organic solvents. The compound is highly reactive, especially in the presence of oxygen or other oxidizing agents, and can form explosive mixtures with air. It polymerizes readily under the influence of heat, light, or peroxides, necessitating inhibitors for safe storage and transport.
Main Applications
The primary use of 1,1-difluoroethylene is in the manufacture of PVDF, which is widely used in coatings, pipes, and films due to its exceptional resistance to chemicals, UV radiation, and abrasion. PVDF is also used in lithium-ion battery binders and photovoltaic backsheets. Additionally, VDF serves as an intermediate in the production of hydrofluorocarbon (HFC) refrigerants, which are alternatives to ozone-depleting chlorofluorocarbons (CFCs). Its derivatives are also explored in advanced materials for sensors and actuators due to their piezoelectric properties.
Safety and Storage
Due to its high flammability and potential to form explosive peroxides, 1,1-difluoroethylene must be stored in tightly sealed containers under inert atmospheres, such as nitrogen. Storage areas should be cool, well-ventilated, and equipped with explosion-proof fittings. Personnel handling VDF must wear appropriate personal protective equipment (PPE), including flame-resistant clothing, gloves, and eye protection. Leaks should be addressed immediately using proper gas detection systems and evacuation procedures if concentrations exceed safe limits.
B2B Procurement Guide
When procuring 1,1-difluoroethylene, verify the supplier’s certifications and compliance with international safety standards like ISO and REACH. Purity requirements (typically 99.5% or higher) should align with the intended application, such as polymer production or refrigerant synthesis. Bulk shipments often use pressurized cylinders or cryogenic tanks, so confirm the packaging integrity and transportation conditions. Negotiate contracts with clear terms for delivery schedules, emergency response protocols, and quality assurance testing to mitigate risks.
Related Manufacturers
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