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Preparation and characterization of the PVDF/LDPE thermoplastic composite having piezoelectric property

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Abstract

Thermoplastic composites were prepared using poly(vinylidene fluoride) (PVDF) having piezoelectric property and low density polyethylene (LDPE). The PVDF/LDPE island-in-a-sea fibers were prepared by melt conjugate spinning for ease of manufacture of the PVDF/LDPE thermoplastic composites. The PVDF and the LDPE were island component and sea component, respectively. And the PVDF/LDPE thermoplastic composites were manufactured through the compression molding under temperatures between melting temperatures of the PVDF and the LDPE. Through this process, the PVDF and the LDPE became a reinforcing fiber and a matrix of the thermoplastic composite, respectively. Composites were prepared under a various molding conditions. Manufactured composites have undergone a post-treatment process, such as poling and drawing for increase of β-phase crystalline contents of PVDF. Through this process, piezoelectric properties were developed. Prepared PVDF/LDPE island-in-a-sea fiber and PVDF/LDPE thermoplastic composites were characterized. Morphologies of the PVDF/LDPE island-in-a-sea fiber and the PVDF/LDPE thermoplastic composites were analyzed using scanning electron microscopy (SEM). Universal testing machine (UTM) was used to measure the mechanical properties. Fourier transform infrared spectroscopy (FT-IR) was used to determine the crystalline characteristics. Finally, molding temperature of 110 °C and molding time of 30 s were identified as an optimal condition for molding process of the PVDF/LDPE composite.

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Acknowledgments

This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (20140239351).

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Correspondence to Seung Goo Lee.

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Lee, H.J., Won, J.S., Lim, S.C. et al. Preparation and characterization of the PVDF/LDPE thermoplastic composite having piezoelectric property. Polym. Bull. 73, 2639–2647 (2016). https://doi.org/10.1007/s00289-016-1739-7

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  • DOI: https://doi.org/10.1007/s00289-016-1739-7

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