Abstract
This study investigated the mechanisms, using microscopy and strength testing approaches, by which the addition of maleic anhydride grafted high-density polyethylene (MAPE) enhances the mechanical properties of basalt fiber-wood-plastic composites (BF-WPCs). The maximum values of the specific tensile and flexural strengths areachieved at a MAPE content of 5%–8%. The elongation increases rapidly at first and then continues slowly. The nearly complete integration of the wood fiber with the high-density polyethylene upon MAPE addition to WPC is examined, and two models of interfacial behavior are proposed. We examined the physical significance of both interfacial models and their ability to accurately describe the effects of MAPE addition. The mechanism of formation of the Model I interface and the integrated matrix is outlined based on the chemical reactions that may occur between the various components as a result of hydrogen bond formation or based on the principle of compatibility, resulting from similar polarity. The Model I fracture occurred on the outer surface of the interfacial layer, visually demonstrating the compatibilization effect of MAPE addition.
Highlights
The study of natural materials has become increasingly important in recent years due to the growing awareness of the need to protect ecological and environmental resources, including shrinking forest resources [1]
This study investigated the effects of maleic anhydride grafted high-density polyethylene (MAPE) on the mechanical properties of basalt fiber-wood-plastic composites (BF-Wood-plastic composites (WPCs)) and studied the mechanisms of those effects by examining the interfacial fracture morphology and the physical and chemical interactions between the constituents
The results of this work provide inspiration for future research efforts. This investigation revealed that the MAPE content affects the mechanical properties of the BF-WPC, which was further discussed based on the fractographic analysis
Summary
The study of natural materials has become increasingly important in recent years due to the growing awareness of the need to protect ecological and environmental resources, including shrinking forest resources [1]. Wood-plastic composites could include high-strength fibers that are significantly longer than crushed wood grain fibers. This type of composite can be expected to exhibit a good strengthening effect. This study investigated the effects of maleic anhydride grafted high-density polyethylene (MAPE) on the mechanical properties of basalt fiber-wood-plastic composites (BF-WPCs) and studied the mechanisms of those effects by examining the interfacial fracture morphology and the physical and chemical interactions between the constituents. An approach is suggested for the development of high-strength, lightweight WPC structural materials by the application of bionic theory [34,35], and the results suggest a new strategy for the protection of precious ecological resources such as wood
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