Usability of polylactide biopolymer as thermoplastic matrix for woven fiber composite laminates

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2022-4-28

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Demirok, Gökberk

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The first purpose of this study was, as the first time in the literature, to investigate usability of polylactide (PLA) biopolymer as the matrix of high-performance composite laminated structures having woven forms of glass and carbon fibers. For this purpose, 2-14 layers of 2x2 twill Carbon Fiber (CF) and 1x1 plain weave Glass Fiber (GF) forms were stacked by PLA powders followed by consolidation of these layers by compression molding technique. After conducting various tests and analysis it was observed that significant improvements in the mechanical and thermal properties could be obtained by laminating PLA with woven CF and GF layers. Another purpose of this study was to compare mechanical performance of the PLA matrix laminates with Epoxy matrix laminates having exactly the same type and number of GF and CF layers. It was revealed that mechanical properties of the PLA/CF laminates were approaching to the values of the Epoxy/CF laminates, while due to poor adhesin between the PLA matrix and Glass Fiber surfaces, the properties were lower in the PLA/GF laminates. Therefore, it could be generally concluded that, in terms of mechanical performance; traditional thermoset Epoxy matrix could be replaced with the renewable biopolymer PLA matrix in the Woven Carbon Fiber laminates. For the Woven Glass Fiber laminates, a proper sizing treatment with a PLA compatible silane coupling agent would be necessary.

Subject Keywords

Polylactide, Biopolymer, Woven carbon fibers, Woven glass fibers, Composite laminates

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https://hdl.handle.net/11511/97315

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Graduate School of Natural and Applied Sciences, Thesis

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Citation Formats

G. Demirok, “Usability of polylactide biopolymer as thermoplastic matrix for woven fiber composite laminates,” M.S. - Master of Science, Middle East Technical University, 2022.