Mechanical, flammable, and thermal performances of co-extruded wood polymer composites with core–shell structure containing barite-filled shells

Wood polymer composites (WPCs) with core–shell structure reinforced with barite (BA)-filled high-density polyethylene (HDPE) shell layer were successfully fabricated, and their thermal expansion and mechanical properties were thoroughly analyzed. The incorporation of BA improved the flexural propert...

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Veröffentlicht in:Wood science and technology 2020-09, Vol.54 (5), p.1299-1318
Hauptverfasser: Huang, Runzhou, Zhang, Xian, Zhou, Chengjun
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Zhang, Xian
Zhou, Chengjun
description Wood polymer composites (WPCs) with core–shell structure reinforced with barite (BA)-filled high-density polyethylene (HDPE) shell layer were successfully fabricated, and their thermal expansion and mechanical properties were thoroughly analyzed. The incorporation of BA improved the flexural properties and reduced the impact strength and linear coefficients of thermal expansion (LCTEs) of the resulting composites, in comparison with unmodified HDPE. The use of relatively rigid pure HDPE with high LCTE values reduced the overall thermal stability and modulus of the WPCs. Both flexural properties and thermal expansion were significantly enhanced for BA-filled HDPE shells compared to the unmodified material. Thus, the novel core–shell layer showed a well-balanced performance. The employment of BA HDPE or unmodified HDPE layers as the shell for the WPC core significantly enhanced the impact strength of the co-extruded WPCs. The tensile modulus for BA-filled composite was predicted by the PPA-based model.
doi_str_mv 10.1007/s00226-020-01213-1
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The incorporation of BA improved the flexural properties and reduced the impact strength and linear coefficients of thermal expansion (LCTEs) of the resulting composites, in comparison with unmodified HDPE. The use of relatively rigid pure HDPE with high LCTE values reduced the overall thermal stability and modulus of the WPCs. Both flexural properties and thermal expansion were significantly enhanced for BA-filled HDPE shells compared to the unmodified material. Thus, the novel core–shell layer showed a well-balanced performance. The employment of BA HDPE or unmodified HDPE layers as the shell for the WPC core significantly enhanced the impact strength of the co-extruded WPCs. The tensile modulus for BA-filled composite was predicted by the PPA-based model.</abstract><cop>Berlin/Heidelberg</cop><pub>Springer Berlin Heidelberg</pub><doi>10.1007/s00226-020-01213-1</doi><tpages>20</tpages><orcidid>https://orcid.org/0000-0002-9224-4939</orcidid></addata></record>
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subjects Barite
Biomedical and Life Sciences
Ceramics
Composites
Core-shell structure
Extrusion
Flammability
Glass
High density polyethylenes
Impact strength
Life Sciences
Machines
Manufacturing
Mechanical properties
Modulus of elasticity
Natural Materials
Original
Polyethylene
Polymer matrix composites
Polymers
Processes
Shells
Skeletal composites
Thermal expansion
Thermal stability
Wood Science & Technology
title Mechanical, flammable, and thermal performances of co-extruded wood polymer composites with core–shell structure containing barite-filled shells
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