Abstract
Fluoropolymers are continuously increasing their application fields in many industrial areas because of their unique properties, such as heat and chemical resistance, high purity, lubricity, dielectric properties etc. [Encyclopedia of Chemical Technology, vol. 11, 3rd ed., Wiley, New York, 1980, p. 1]. This paper describes very promising results obtained thanks to the Ausimont proprietary technology of microemulsion polymerization in formulating bimodal and multimodal fluoropolymer dispersions with superior film forming behavior. Very carefully size-controlled nanoparticles, ranging from 10 to 60 nm, allow to obtain blend with 200–250 nm particles that not only do have highly improved film formation properties, but also show outstanding film characteristics with respect to conventional 200/110 nm bimodal PTFE latexes. Moreover, the high flexibility in selecting polymer characteristics such as molecular weight, particle shape, monomer composition and melting properties allows to have sintered films with a denser and tougher structure characterized by superior mechanical and barrier properties.
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