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Preparation of PVDF/PAR Composites with Piezoelectric Properties by Post-Treatment

Department of Advanced Organic Materials & Textile Engineering, Chungnam National University, Daejeon 305-764, Korea
Author to whom correspondence should be addressed.
Polymers 2018, 10(12), 1333;
Received: 5 November 2018 / Revised: 26 November 2018 / Accepted: 30 November 2018 / Published: 3 December 2018
(This article belongs to the Special Issue Aromatic Polymers)
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Thermoplastic composites were prepared using poly (vinylidene fluoride) (PVDF) as the matrix with piezoelectric properties and aromatic polyarylate (PAR) as the reinforcing component. The PVDF/PAR conjugate fibers were prepared by melt conjugate spinning. The PVDF/PAR composites were prepared by compression molding of the PVDF/PAR conjugate fiber laminates at various molding temperatures. Drawing and poling post-treatments of the PVDF/PAR composites were performed to increase the β crystalline phase content of the PVDF. The morphologies of the PVDF/PAR composites were observed by scanning electron microscopy, and the tensile properties were tested using an universal testing machine. The crystal structure of the PVDF/PAR composites was confirmed by Fourier transform infrared spectroscopy and X-ray diffraction. The piezoelectric properties were tested using voltmeters and multimeters. The post-treatments enhanced the content of the β crystalline phase of the PVDF matrix, thereby improving the piezoelectric properties of the composites. A molding temperature of 180 °C, drawing temperature of 90 °C, and poling voltage of 12 kV were identified as the optimal conditions for the preparation of the PVDF/PAR composite. View Full-Text
Keywords: PVDF; piezoelectric; island-in-a-sea fiber; conjugate spinning; polyarylate; thermoplastic composite; drawing; poling PVDF; piezoelectric; island-in-a-sea fiber; conjugate spinning; polyarylate; thermoplastic composite; drawing; poling

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Oh, W.J.; Lim, H.S.; Won, J.S.; Lee, S.G. Preparation of PVDF/PAR Composites with Piezoelectric Properties by Post-Treatment. Polymers 2018, 10, 1333.

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