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Article

Morphological and Mechanical Properties of Bilayers Wood-Plastic Composites and Foams Obtained by Rotational Molding

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Department of Chemical Engineering and CERMA, Université Laval, Quebec, QC G1V 0A6, Canada
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Departamento de Ingeniería Química, CUCEI, Universidad de Guadalajara, Blvd. Gral. Marcelino García Barragán 1421, Guadalajara, Jalisco 44430, Mexico
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Departamento de Física, CUCEI, Universidad de Guadalajara, Blvd. Gral. Marcelino García Barragán 1421, Guadalajara, Jalisco 44430, Mexico
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Departamento de Química, CUCEI, Universidad de Guadalajara, Blvd. Gral. Marcelino García Barragán 1421, Guadalajara, Jalisco 44430, Mexico
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Authors to whom correspondence should be addressed.
Polymers 2020, 12(3), 503; https://doi.org/10.3390/polym12030503
Received: 6 February 2020 / Revised: 21 February 2020 / Accepted: 23 February 2020 / Published: 25 February 2020
In this work, the suitability for the production of sustainable and lightweight materials with specific mechanical properties and potentially lower costs was studied. Agave fiber (AF), an agro-industrial waste, was used as a reinforcement and azodicarbonamide (ACA) as a chemical blowing agent (CBA) in the production of bilayer materials via rotational molding. The external layer was a composite of linear medium density polyethylene (LMDPE) with different AF contents (0–15 wt %), while the internal layer was foamed LMDPE (using 0–0.75 wt % ACA). The samples were characterized in terms of thermal, morphological and mechanical properties to obtain a complete understanding of the structure-properties relationships. Increases in the thicknesses of the parts (up to 127%) and a bulk density reduction were obtained by using ACA (0.75 wt %) and AF (15 wt %). Further, the addition of AF increased the tensile (23%) and flexural (29%) moduli compared to the neat LMDPE, but when ACA was used, lower values (75% and 56% for the tensile and flexural moduli, respectively) were obtained. Based on these results, a balance between mechanical properties and lightweight can be achieved by selecting the AF and ACA contents, as well as the performance and aesthetics properties of the rotomolded parts. View Full-Text
Keywords: natural fibers; foams; bilayer materials; rotational molding; thermal properties; morphology; mechanical properties natural fibers; foams; bilayer materials; rotational molding; thermal properties; morphology; mechanical properties
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MDPI and ACS Style

Vázquez Fletes, R.C.; Cisneros López, E.O.; Moscoso Sánchez, F.J.; Mendizábal, E.; González Núñez, R.; Rodrigue, D.; Ortega Gudiño, P. Morphological and Mechanical Properties of Bilayers Wood-Plastic Composites and Foams Obtained by Rotational Molding. Polymers 2020, 12, 503. https://doi.org/10.3390/polym12030503

AMA Style

Vázquez Fletes RC, Cisneros López EO, Moscoso Sánchez FJ, Mendizábal E, González Núñez R, Rodrigue D, Ortega Gudiño P. Morphological and Mechanical Properties of Bilayers Wood-Plastic Composites and Foams Obtained by Rotational Molding. Polymers. 2020; 12(3):503. https://doi.org/10.3390/polym12030503

Chicago/Turabian Style

Vázquez Fletes, Roberto C., Erick O. Cisneros López, Francisco J. Moscoso Sánchez, Eduardo Mendizábal, Rubén González Núñez, Denis Rodrigue, and Pedro Ortega Gudiño. 2020. "Morphological and Mechanical Properties of Bilayers Wood-Plastic Composites and Foams Obtained by Rotational Molding" Polymers 12, no. 3: 503. https://doi.org/10.3390/polym12030503

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