期刊
POLYMERS
卷 10, 期 12, 页码 -出版社
MDPI
DOI: 10.3390/polym10121333
关键词
PVDF; piezoelectric; island-in-a-sea fiber; conjugate spinning; polyarylate; thermoplastic composite; drawing; poling
资金
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Education [2017139002]
- National Research Foundation of Korea [2017R1D1A1B03034015] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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 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 crystalline phase of the PVDF matrix, thereby improving the piezoelectric properties of the composites. A molding temperature of 180 degrees C, drawing temperature of 90 degrees C, and poling voltage of 12 kV were identified as the optimal conditions for the preparation of the PVDF/PAR composite.
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