Industry/University Cooperative Research: Processing of Polyvinylidene Fluoride For Technological Applications

聚偏氟乙烯PVF塑料最重要的高科技应用是一般类型的换能器，其韧性和灵活性使其能够以薄膜的形式用于宽频率范围的超声波和疏水设备以及医疗诊断。PVF至少有四种结晶形式，这种形式因其压电性和热释电性而引起主要的技术兴趣。这项研究的目标是应用一些独特的加工技术，有可能直接产生所需形式的晶体结构，并表征所产生的性能和结构。可应用的加工技术包括流动诱导结晶、悬浮-凝胶纺丝、单向和双向拉伸变形、轧制、薄膜淬火和电场诱导取向。

The most important high-technology applications of poly (vinylidene fluoride) PVF plastics are in the general category of transducers, where its toughness and flexibility enables its use in the form of thin films in ultrasonic and hydrophonic devices over wide frequency ranges as well as in medical diagnostics. PVF crystallizes in at least four crystal forms, the form being of primary technological interest because of its piezo- and pyrolectric properties. The goal of this research is to apply a number of unique processing techniques, with the potential of directly yielding the desired form crystal structure, and to characterize the resulting properties and structure. Processing techniques to be applied include flow-induced crystallization, suspension-gel spinning, uniaxial and biaxial tensile deformation, rolling, thin film quenching, and electric field induced orientation.