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Open AccessArticle

Piezoelectric Films Based on Polyethylene Modified by Aluminosilicate Filler

1
Faculty of Chemistry, Nicolaus Copernicus University in Toruń, ul. Gagarina 7, 87-100 Toruń, Poland
2
Łukasiewicz Research Network—Institute for Engineering of Polymer Materials and Dyes–Toruń Division, ul. M. Skłodowskiej-Curie 55, 87-100 Toruń, Poland
3
Institute of Electron Technology—Kraków Division, ul. Zabłocie 39, 30-701 Kraków, Poland
*
Authors to whom correspondence should be addressed.
Polymers 2019, 11(8), 1345; https://doi.org/10.3390/polym11081345
Received: 4 June 2019 / Revised: 5 August 2019 / Accepted: 9 August 2019 / Published: 13 August 2019
(This article belongs to the Special Issue Multiphase Structure of Polymeric Materials and Physical Properties)
The development, universality and miniaturization of electronic devices leads to the search for new piezoelectric materials, among which recently, polymers play an increasingly important role. In this work, composites based on two types of polyethylene—high density polyethylene (HDPE), and medium density polyethylene (MDPE)—and aluminosilicate fillers were obtained by extrusion process. This method allowed obtaining flexible electrets in the form of a thin film after polarization under a constant electric field of 100 V/μm. The morphology of the composites was characterized by scanning electron microscopy, whereas the crystallinity was determined by X-ray diffraction. The mechanical properties and thermal stability of the composites were examined by means of tensile tests and thermogravimetry, respectively. The piezoelectric characteristics were appointed by measuring the electric charge and the voltage in the polarized samples. Piezoelectric coefficients, and the stability of electrets over time were also determined. Moreover, the effect of film orientation on piezoelectric properties was investigated. Composites with appropriate morphology (i.e., well dispersed filler particles in the polymer matrix and formed holes) were obtained which ensured permanent electrical polarization. It was found that the best piezoelectric, mechanical properties and thermal stability exhibits HDPE composite with 5% of aluminosilicate filler. View Full-Text
Keywords: poly(ethylene); polymer composites; aluminosilicates; piezoelectric properties; composite characterisation poly(ethylene); polymer composites; aluminosilicates; piezoelectric properties; composite characterisation
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MDPI and ACS Style

Kaczmarek, H.; Królikowski, B.; Chylińska, M.; Klimiec, E.; Bajer, D. Piezoelectric Films Based on Polyethylene Modified by Aluminosilicate Filler. Polymers 2019, 11, 1345.

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