Cosse Renato Lemos, van der Most Tobias, Voet Vincent S D, Folkersma Rudy, Loos Katja
Circular Plastics, Academy Tech & Design, NHL Stenden University of Applied Sciences, Van Schaikweg 94, 7811 KL Emmen, The Netherlands.
Macromolecular Chemistry and New Polymeric Materials, Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 3, 9747 AG Groningen, The Netherlands.
Biomimetics (Basel). 2025 Jan 13;10(1):46. doi: 10.3390/biomimetics10010046.
Wood plastic composites (WPCs) offer a means to reduce the carbon footprint by incorporating natural fibers to enhance the mechanical properties. However, there is limited information on the mechanical properties of these materials under hostile conditions. This study evaluated composites of polypropylene (PP), polystyrene (PS), and polylactic acid (PLA) processed via extrusion and injection molding. Tests were conducted on tensile and flexural strength and modulus, heat deflection temperature (HDT), and creep analysis under varying relative humidity conditions (10% and 90%) and water immersion, followed by freeze-thaw cycles. The addition of fibers generally improved the mechanical properties but increased water absorption. HDT and creep were dependent on the crystallinity of the composites. PLA and PS demonstrated a superior overall performance, except for their impact properties, where PP was slightly better than PLA.
木塑复合材料（WPC）通过加入天然纤维来增强机械性能，从而提供了一种减少碳足迹的方法。然而，关于这些材料在恶劣条件下的机械性能的信息有限。本研究评估了通过挤出和注塑加工的聚丙烯（PP）、聚苯乙烯（PS）和聚乳酸（PLA）复合材料。在不同相对湿度条件（10%和90%）以及水浸后进行冻融循环的情况下，对拉伸强度和模量、弯曲强度和模量、热变形温度（HDT）以及蠕变分析进行了测试。纤维的添加通常改善了机械性能，但增加了吸水性。HDT和蠕变取决于复合材料的结晶度。PLA和PS表现出卓越的综合性能，但其冲击性能除外，在冲击性能方面PP略优于PLA。
