Development of carbon fabric-reinforced polylactic acid/acrylonitrile butadiene styrene multilayer composites

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2021-8

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Öztürk, İrem

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Multilayer composites are in concern of both world of material science and the industry because of providing enhanced mechanical properties with ultra lightweight. Also, there is a growing demand to use of recyclable, biodegradable materials in polymer composites for the sake of environmental health. In this study, polymer blends were prepared with polylactic acid (PLA) and acrylonitrile butadiene styrene (ABS) with 10, 30, and 50 wt.%. To compatibilize these polymers, styrene-ethylene-butylene-styrene terpolymer grafted with maleic anhydride (SEBS-MAH), ethylene-glycidyl methacrylate copolymer (E-GMA), styrene-maleic anhydride (SMA), and styrene-acrylonitrile-glycidyl methacrylate (SAN-GMA) with 5, 10, and 15 wt.%. were added. The polymer blending was carried out using a co-rotating twin screw extruder. The polymer layers of multilayer composites were prepared with neat PLA, 70PLA/30ABS and 10SAN-GMA/(70PLA/30ABS), and reinforced with one and three layers carbon fabric (CF). The multilayer composites were produced with compression molding process. The polymer blends and the multilayer composites were mainly characterized in terms of their physical properties and morphologies. While all binary blends have approximately the same impact strength values, tensile strength of 70PLA/30ABS blend was 40% higher than other binary blends. The addition of 10 wt.% SAN-GMA into PLA/ABS blends resulted in maximum impact strength of 27.0 kJ/m2 among the ternary blends. Composites with three layers CF exhibited higher mechanical properties than the composites with one layer CF. SAN-GMA compatibilizer was efficient in decreasing the interfacial tension between PLA and ABS. However, it did not yield the same performance when used in the polymer layers of the multilayer composites.

Subject Keywords

Polylactic acid, Acrylonitrile butadiene styrene, Carbon fabric, Modification, Thermoplastic multilayer composites

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https://hdl.handle.net/11511/92190

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Graduate School of Natural and Applied Sciences, Thesis

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Citation Formats

İ. Öztürk, “Development of carbon fabric-reinforced polylactic acid/acrylonitrile butadiene styrene multilayer composites,” M.S. - Master of Science, Middle East Technical University, 2021.