Method for preparing pyroelectric polymer film based on combined process of solution casting and uniaxial stretching
A method for preparing a pyroelectric polymer film based on a combined process of solution casting and uniaxial stretching is disclosed. The pyroelectric polymer film is firstly prepared by solution casting, afterwards, the casted film is subjected to uniaxial stretching when the film is in a semi-cured state (wet film). Thus a larger stretching ratio (>10) at a lower temperature (even at room temperature) is realized. Without undergoing a further poling process, the as-stretched film does have a fairly, good pyroelectric performance. Moreover, the surface of the stretched film is smoother and has fewer surface defects.
University of Electronic Science and Technology of China
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Xiaosong Yuming Jimeng Weizhi Huiling He
Du Wu Li Li Tai Yu