Morphological,rheological, crystalline and mechanical properties of ethylene-vinyl acetate copolymer/linear low-density polyethylene/amphiphilic graphene oxide nanocomposites |
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| Institution: | 1. Laboratory of Advanced Polymers & Optimized Materials (LAPOM), Department of Materials Science and Engineering, University of North Texas, 3940 North Elm Street, Denton, TX 76207, USA;2. Encore Wire Corp., 1324 Millwood Road, McKinney, TX 75069, USA;1. Department of Material and Commodity Sciences and Textile Metrology, Lodz University of Technology, 90-924 Lodz, Poland;2. Institute of Applied Computer Science, Lodz University of Technology, 90-924 Lodz, Poland;3. University of Social Sciences, 90-113 Lodz, Poland;1. The Key Laboratory of Polymer Processing Engineering, Ministry of Education, China (South China University of Technology), Guangzhou, 510640, China;2. College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, China;3. School of Chemistry and Chemical Engineering, Guangxi University, Nanning, 530004, China;1. College of Materials Science and Metallurgy Engineering, Guizhou University, Guiyang 550025, Guizhou, People''s Republic of China;2. National Engineering Research Center for Compounding and Modification of Polymeric Materials, Guiyang 550014, Guizhou, People''s Republic of China;3. College of Materials and Metallurgy Engineering, Guizhou Institute of Technology, Guiyang 550003, Guizhou, People''s Republic of China |
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| Abstract: | Chemical modification of graphene oxide has become a popular method for imparting unique properties to extend its application. Here, we show a simple way to synthesize amphiphilic graphene oxide (AGO) by grafting quaternary ammonium salt onto GO sheets. The AGO sheets not only showed high thermal stability and good dispersion in many polar and non-polar solvents in comparison to GO sheets but also the chemical modification maintained the two-dimensional structure. As a result, the AGO sheets improve the interfacial interaction between ethylene-vinyl acetate copolymer (EVA) and linear low-density polyethylene (LLDPE). Because of the large size of AGO, the location of AGO is very dependent on the mixing strategy. The AGO was dispersed in the EVA phase when AGO was mixed first with EVA and then with LLDPE, whereas it was confined in the LLDPE phase when AGO was mixed first with LLDPE and then with EVA. AGO sheets were found at the interface of LLDPE and EVA when AGO, EVA, and LLDPE were mixed together, suggesting that AGO has a high interfacial interaction with both LLDPE and EVA. These high interfacial interactions lead to high tensile strength, Young's modulus, complex viscosity and crystallization temperature in comparison to the EVA/LLDPE blends without AGO sheets. |
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| Keywords: | Ethylene-vinyl acetate copolymer Linear low-density polyethylene Amphiphilic graphene oxide Interfacial interaction Mechanical property |
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