Extrusión de compuestos madera plástico espumados. Parte I: Caracterización física y morfológica
Extrusion of foamed wood-plastic composites. Part I: Physical and morphological characterization
Available online: 2017-07-30 / pages.385-400
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Introduction: The use of wood-plastic composites (WPCs) has been limited due to their low impact strength and high density compared to natural wood. Objective: To characterize the cellular morphology and density of WPCs prepared with virgin and recycled polyethylene, and Pinus radiata wood. Materials and methods: The polymer and the foamed WPCs were manufactured by an extrusion process. The virgin and recycled high-density polyethylene was mixed separately with P. radiata wood. The plastic/wood ratios were 80/20 and 70/30, with an endothermic foaming agent (Hydrocerol 1700 at 1 and 3 %), a coupling agent (Licocene 4351), and a lubricating agent (Licolub H12) added. Results and discussion: The density of virgin polymer, with 1 and 3 % foaming agent, was reduced by 39 and 20 %, respectively, but in the recycled polymer the reduction was 18 and 23 %, respectively. In the foamed WPCs, the reduction was less than 10 %. The foamed composites had smaller bubble diameter and higher cell density. The void fraction was higher in the virgin polymer at 3 % foaming. Conclusion: The use of a foaming agent gave better physical properties to the composites.Keyworks: High-density polyethylene, cellular morphology, Hydrocerol, maleated polyethylene.
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Moreno-Pérez, P. A., Ballerini, A., Gacitúa, W., & Rodrigue, D. (2017). Extrusion of foamed wood-plastic composites. Part I: Physical and morphological characterization. Revista Chapingo Serie Ciencias Forestales y del Ambiente, XXIII(3), 385-400. http://dx.doi.org/10.5154/r.rchscfa.2016.09.051