Morphology and properties of super-toughened bio-based poly(lactic acid)/poly(ethylene-co-vinyl acetate) blends by peroxide-induced dynamic vulcanization and interfacial compatibilization |
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| Institution: | 1. School of Mechanical Engineering, Guangdong Mechanical and Electrical College, Guangzhou 510515, China;2. National-certified Enterprise Technology Center, Kingfa Scientific and Technological Co. Ltd., Guangzhou 510663, China;3. College of Materials Science and Engineering, Key Laboratory of Polymer Processing Engineering of the Ministry of Education, South China University of Technology, Guangzhou 510640, China;1. The Key Laboratory of Food Colloids and Biotechnology of Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, 1800 Lihu Road, Wuxi 214122, China;2. Laboratory of Polymer Technology, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, Eindhoven 5612 AZ, The Netherlands;3. School of Food Science and Technology, Jiangnan University, 1800 Lihu Road, Wuxi 214122, China;4. School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;1. The Key Laboratory of Polymer Processing Engineering, Ministry of Education, South China University of Technology, Guangzhou, 510640, China;2. School of Chemistry and Chemical Engineering, Guangxi University, Nanning, 530004, China;1. The Key Laboratory of Food Colloids and Biotechnology, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, 1800 Lihu Road, Wuxi 214122, China;2. School of Food Science and Technology, Jiangnan University, 1800 Lihu Road, Wuxi 214122, China;3. School of Chemistry and Chemical Engineering, Shanghai JiaoTong University, Shanghai 200240, China;1. Polymer PROcessing and Flow (P-PROF) Research Group, Division of Materials Technology, School of Energy, Environment and Materials, King Mongkut''s University of Technology Thonburi (KMUTT), Thungkru, Bangkok 10140, Thailand;2. Laboratory of Environmental Biotechnology, Faculty of Environment and Resource Studies, Mahidol University, Salaya, Nakhon Pathom 73170, Thailand |
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| Abstract: | Super-toughened poly(lactic acid) (PLA)/poly(ethylene-co-vinyl acetate) (EVA) blends were prepared via 2,5-dimethyl-2,5-di(tert-butylperoxy)hexane (AD) induced dynamic vulcanization and in situ interfacial compatibilization. The effects of AD on the morphology and properties of PLA/EVA blends were studied using a Brabender torque rheometer, gel content test, scanning electron microscopy (SEM), differential scanning calorimetry (DSC) thermogravimetric analysis (TGA) and mechanical properties test. The torque and gel content demonstrated that EVA and PLA was successfully vulcanized in the presence of free radicals obtained by the decomposition of the 2,5-dimethyl-2,5-di(tert-butylperoxy)hexane (AD). Additionally, the gel content results indicated that, compared with PLA, EVA is more aggressive with free radicals. The SEM revealed that a relatively uniform phase morphology and good interfacial compatibilization were achieved in the dynamically vulcanized PLA/EVA/AD blends. The interfacial reaction and compatibilization between the component polymers resulted in the formation of super-toughened PLA/EVA blended materials. |
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| Keywords: | Dynamic vulcanization Super-tough Morphology Properties |
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