Polylactic Acid-Glass Fiber Composites: Structural, Thermal, and Electrical Properties

Polymers (Basel). 2022 Sep 25;14(19):4012. doi: 10.3390/polym14194012.


The aim of this study is to investigate the influence of different glass fibers made of commercial silicate, borosilicate, and laboratory-made iron-phosphate compositions, on the preparation of polylactic acid (PLA) composites and their structural and physical properties. The thermal, structural, and electrical properties of prepared PLA-glass fiber composites were studied using differential scanning calorimetry, X-ray diffraction, microscopy, and impedance spectroscopy. The structural as well as morphological, thermal, and electrical properties of all PLA-glass composites were found to be very similar and independent of the composition and aspect ratio of glass fibers. All types of glass fibers improve mechanical properties, increase thermal stability, and decrease the electrical conductivity of PLA, thereby producing mechanical strong electrically insulating composite material with potential in various applications.

Keywords: PLA composites; electrical properties; glass fibers; polylactic acid; reinforcing PLA; thermal properties.