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dc.contributor.authorPelaez Samaniego, Manuel Raul
dc.description.abstractUndebarked ponderosa pine chips were treated by hot water extraction to modify the chemical composition. In the treated pine (TP), the mass was reduced by approximately 20 %, and the extract was composed mainly of degradation products of hemicelluloses. Wood flour produced from TP and unextracted chips (untreated pine, UP) was blended with high-density polyethylene (HDPE) and polypropylene (PP) and was extruded into wood plastic composites (WPCs). Formulations for WPCs consisted of 58 % pine, 32 % plastic, and 10 % other additives. WPC based on HDPE? + ?TP and PP? +?TP absorbed 46-45% less water than did WPC based on HDPE? +?UP and PP? + ?UP, respectively. Thickness swelling was reduced by 45-59%, respectively, after 2520 h of immersion. The diffusion constant decreased by approximately 36 %. Evaluation of mechanical properties in flexure and tension mode indicated improvements in TP-WPC properties, although the data were not statistically significant in all cases. Results showed that debarking of ponderosa pine is not required for WPC production.
dc.subjectHot water extraction
dc.subjectWood plastic composites (WPC)
dc.titleHot water extracted wood fiber for production of wood plastic composites (WPCs)
dc.ucuenca.embargoend2022-01-01 0:00
dc.ucuenca.afiliacionpelaez-samaniego, m.r., biological systems engineering department, washington state university, pullman, wa, united states, faculty of chemical sciences, universidad de cuenca, cuenca, ecuador
dc.ucuenca.correspondenciaYadama, V.; Composite Materials and Engineering Center, Washington State University, Pullman, WA 99164, United States; email:
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