Mechanical,thermal expansion,and flammability properties of co-extruded wood polymer composites with basalt fiber reinforced shells |
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| Affiliation: | 1. School of Renewable Natural Resources, Louisiana State University Agricultural Center, Baton Rouge, LA 70803, USA;2. College of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha, China;3. Korea Forest Research Institute, Seoul 130-712, Republic of Korea;1. College of Materials and Energy, South China Agricultural University, Guangzhou 510642, China;2. Key Laboratory of Bio–based Material Science and Technology (Ministry of Education), Northeast Forestry University, Harbin, Heilongjiang 150040, China;3. School of Renewable Natural Resources, Louisiana State University Agricultural Center, Baton Rouge, LA 70803, USA;1. School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China;2. Department of Civil Engineering, Monash University, Clayton, VIC 3800, Australia;3. International Institute for Urban Systems Engineering, Southeast University, Nanjing 210096, China;4. Department of Mechanical and Aerospace Engineering, Monash University, Clayton, VIC 3800, Australia;5. Department of Chemical Engineering, Monash University, Clayton, VIC 3800, Australia;1. Interior Architecture Department, Faculty of Architecture, Karadeniz Technical University, 61080 Trabzon, Turkey;2. Forest Industry Engineering Department, Faculty of Forestry, Kahramanmaras Sutcuimam University, 46100 Kahramanmaras, Turkey;3. Material Science and Technology, Graduate School of Natural & Applied Sciences, Kahramanmaras Sutcuimam University, 46100 Kahramanmaras, Turkey;1. Key Laboratory of Bio-based Material Science and Technology (Ministry of Education), Northeast Forestry University, Harbin 150040, China;2. College of Materials and Energy, South China Agriculture University, Guangzhou 510642, China |
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| Abstract: | Basalt fiber (BF) filled high density polyethylene (HDPE) and co-extruded wood plastic composites (WPCs) with BF/HDPE composite shell were successfully prepared and their mechanical, morphological and thermal properties characterized. The BFs had an average diameter of 7 μm with an organic surfactant surface coating, which was thermally decomposed at about 210 °C. Incorporating BFs into HDPE matrix substantially enhanced flexural, tensile and dynamic modulus without causing a noticeable decrease in the tensile and impact strength of the composites. Micromechanical modeling of tensile properties for the BF/HDPE composites showed a good fit of the selected models to the experimental data. Compared to neat HDPE, BF/HDPE composites had reduced linear coefficient of thermal expansion (LCTE) values. The use of the pure HDPE and BF/HDPE layers over a WPC core greatly improved impact strength of core–shell structured composites. However, the relatively less-stiff HDPE shell with large LCTE values decreased the overall composite modulus and thermal stability. Both flexural and thermal expansion properties were enhanced with BF reinforced HDPE shells, leading to well-balanced properties of core–shell structured material. Cone calorimetry analysis indicated that flammability performance of core–shell structured composites was improved as the BF content increased in the shell layer. |
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| Keywords: | Basalt fiber Co-extrusion Mechanical properties Thermal expansion WPC |
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