Vázquez Fletes Roberto Carlos, Cisneros López Erick Omar, Moscoso Sánchez Francisco Javier, Mendizábal Eduardo, González Núñez Rubén, Rodrigue Denis, Ortega Gudiño Pedro
Department of Chemical Engineering and CERMA, Université Laval, Quebec, Quebec, G1V 0A6, Canada.
Departamento de Ingeniería Química, CUCEI, Universidad de Guadalajara, Blvd. Gral. Marcelino García Barragán 1421, Guadalajara, Jalisco 44430, México.
Polymers (Basel). 2020 Feb 25;12(3):503. doi: 10.3390/polym12030503.
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.
在这项工作中，研究了生产具有特定机械性能且成本可能更低的可持续轻质材料的适用性。龙舌兰纤维（AF）作为一种农业工业废料，在通过滚塑生产双层材料时用作增强材料，偶氮二甲酰胺（ACA）用作化学发泡剂（CBA）。外层是具有不同AF含量（0 - 15 wt%）的线性中密度聚乙烯（LMDPE）复合材料，而内层是发泡LMDPE（使用0 - 0.75 wt% ACA）。对样品的热性能、形态和机械性能进行了表征，以全面了解结构 - 性能关系。通过使用ACA（0.75 wt%）和AF（15 wt%），部件厚度增加（高达127%）且体积密度降低。此外，与纯LMDPE相比，添加AF提高了拉伸模量（23%）和弯曲模量（29%），但使用ACA时，模量值较低（拉伸模量和弯曲模量分别为75%和56%）。基于这些结果，通过选择AF和ACA的含量以及滚塑部件的性能和美学性能，可以实现机械性能和轻质之间的平衡。
