PVDF

PVDF, short for polyvinylidene fluoride, is a highly non-reactive thermoplastic fluoropolymer renowned for chemical resistance, mechanical strength, and electrical insulation. It is produced by polymerizing vinylidene fluoride, usually by suspension polymerization, yielding a semi-crystalline resin. PVDF exists as homopolymers and as copolymers such as PVDF-co-hexafluoropropylene (PVDF-HFP). The material resists solvents, acids, and bases, has low water absorption, and exhibits good dielectric properties and thermal stability for many industrial environments. The crystalline phase and degree influence properties including stiffness, clarity, and, in certain grades, piezoelectric behavior in the beta phase.

PVDF can be processed by extrusion, injection molding, calendering, and solution or dispersion casting, and is available as pellets, films, and coatings. Copolymers like PVDF-HFP offer improved flexibility and lower processing temperatures compared with the homopolymer, at some cost to chemical resistance or crystallinity.

Applications include chemical processing equipment, corrosion-resistant piping and linings, protective coatings for metal surfaces, and membranes for water treatment and filtration. PVDF films and coatings are used in electrical insulation and protective barriers, and PVDF is a common binder in lithium-ion battery electrodes. The material is valued for maintaining properties in harsh chemical and high-temperature environments.