期刊
MATERIALS & DESIGN
卷 60, 期 -, 页码 334-342出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.matdes.2014.04.010
关键词
Basalt fiber; Co-extrusion; Mechanical properties; Thermal expansion; WPC
资金
- Louisiana Board of Regents Industrial Tie Subprogram [LEQSF(2010-13)-RD-B-01]
- Korea Forest Research Institute
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 mu m with an organic surfactant surface coating, which was thermally decomposed at about 210 degrees 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. (C) 2014 Elsevier Ltd. All rights reserved.
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