In order to further expand the application field of wood-plastic composites, it is necessary to study the reliability of this material in practical applications. Therefore, this work takes the maximum stress theory as the failure criterion and uses the finite element method to simulate the reliability of the WPC specimen. Based on the simulation results, the relationship between reliability and random variables such as geometric parameters and external load is analyzed. Finite element simulations are carried out for each group of specimens under the same operating environment to analyze the influence of process parameters such as the wood flour content, granulation temperature, coupling agent content and screw speed on the reliability of the specimens during the manufacturing process. The results show that the wood flour content has the greatest influence on the reliability of the specimens when the wood-plastic composites are used as building paving materials, followed by the granulation temperature, coupling agent content and screw speed, which provides a basis for the selection of the manufacturing process parameters of WPC based on reliability.
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http://dx.doi.org/10.3390/polym15020312 | DOI Listing |
Biomimetics (Basel)
January 2025
Macromolecular Chemistry and New Polymeric Materials, Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 3, 9747 AG Groningen, The Netherlands.
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.
View Article and Find Full Text PDFMaterials (Basel)
December 2024
Instytut Techniki Budowlanej, 00-611 Warsaw, Poland.
Wood-plastic composites (WPC) combine the properties of polymers and wood, providing an attractive alternative to traditional materials, particularly for terrace flooring. When exposed to various environmental conditions, WPCs are affected by factors, such as water and ultraviolet (UV) radiation. Although most test methods for assessing the durability of these products have focused on changes in mechanical properties and linear dimensions, out-of-plane deformations (concavity and convexity) are often overlooked.
View Article and Find Full Text PDFPolymers (Basel)
December 2024
Dhahran Techno-Valley, King Fahd University of Petroleum & Minerals, Dhahran 31261, Saudi Arabia.
The natural and laboratory-accelerated weathering of wood-plastic composites (WPCs) based on high-density polyethylene (HDPE) and polypropylene (PP) plastics was investigated in this study. Injection molded samples of WPCs with different loadings of wood fiber ranging from 0 to 36 wt.% of wood were subjected to laboratory-accelerated weathering and natural weathering.
View Article and Find Full Text PDFPolymers (Basel)
December 2024
Department of Technology and Entrepreneurship in Wood Industry, Institute of Wood Sciences and Furniture, Warsaw University of Life Sciences-SGGW, 159 Nowoursynowska St., 02-776 Warsaw, Poland.
This study investigates the properties of composites produced using post-consumer polypropylene (PP) reinforced with lignocellulosic fillers from (black cumin) and rapeseed pomace. Using agri-food by-products like pomace supports waste management efforts and reduces the demand for wood in wood-plastic composites. The composite production method combined extrusion and hot flat pressing.
View Article and Find Full Text PDFJ Ind Ecol
December 2024
Group for Sustainability and Technology ETH Zurich Zurich Switzerland.
To fight plastic pollution and reach net-zero ambitions, policy and industry set goals to increase the recycling of plastics and the recycled content in products. While this ideally reduces demand for virgin material, it also increases pressure on recyclers to find suitable endmarkets for the recyclate. This may lead to two effects: a multiplication of recycled content in applications already made of plastic and a substitution of non-plastic materials with cheap, low-quality recyclate.
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