High performance P(VDF-TrFE) copolymer for pyroelectric conversion
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United States of America Patent
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Jan 29, 2008
Grant Date -
Jun 8, 2006
app pub date -
Dec 2, 2004
filing date -
Dec 2, 2004
priority date (Note) -
Expired
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Abstract
A process for purifying a P(VDF-TrFE) copolymer to produce an improved high performance copolymer for pyroelectric conversion. Pellets of a P(VDF-TrFE) copolymer are dissolved in a solvent to form a solution. Subsequently, anhydrous ethanol is added to the solution to initiate copolymer gel precipitation, after which the solution is separated to obtain the gel precipitate, which is subsequently washed and dried. The resulting copolymer has fewer impurities and higher resistivity, thereby being suitable for use in applications such as pyroelectric converters. The purified copolymer also exhibits phase transition characteristics that allow for increased power output.
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