Arkema Inc.

Lawrence H Judovits

Jean-Alex Laffitte

Manuel A Garcia-Leiner

Christophe Roger

Julie Boyer

Stephan Moyses

Saeid Zerafati

Ravi R Gupta

Nicholas J Rodak

A method of manufacturing a film or membrane includes: (a) dissolving at least one polymer comprising a poly(aryl ketone) in at least one solvent to form a dope; (b) depositing the dope on a substrate to form a coated substrate at appropriate conditions; and (c) drying the coated substrate to form the film or membrane. The dope may also include additional polymers or fillers, such as carbon nanotubes.

Films and membranes of poly(aryl ketones) and methods of casting the same from solution

Films and membranes of poly (aryl ketones) and methods of casting the same from solution

The invention relates to compositions of polyvinylidene fluoride (PVDF) and its copolymers that have been modified with an onium salt. The PVDF compositions exhibit an increased melting point, a reduced heat distortion and piezo properties. The improved properties can be further enhanced through annealing, and/or the addition of nanoclays. Additionally, the combination of PVDF, nanoclays and annealing can also produce a PVDF with an increased melting point and piezoelectric properties.

Polyvinylidene fluoride having an increased melting point

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Collegeville, PA, United States of America

Lawrence H Judovits