This study investigates the profound impact of surface modification using the silane coupling agent KH550 on Coal Gangue (CG)-Polyethylene (PE) composites. The aim was to enhance the properties of composites while addressing waste material accumulation concerns. Comprehensive analyses elucidated the mechanism of interface formation and the subsequent influence on composite properties. Surface modification of CG with KH550 demonstrated pronounced effects on physical, mechanical, and thermal properties of the resulting composites. Notably, the coupling agent facilitated covalent bonding with CG, preventing particle agglomeration and enhancing dispersion stability. The introduction of KH550 contributed to heterogeneous nucleation, augmenting composite crystallinity and interfacial bonding with the resin, thereby improving overall compatibility. Mechanical tests revealed substantial enhancements in tensile and bending strengths with optimal KH550 content. However, excess KH550 led to diminishing returns, highlighting the critical balance required for effective modification. Thermal stability assessments demonstrated improved properties owing to KH550 modification, validating its role in safeguarding the composite matrix from thermal degradation. Microstructural analyses, including SEM, FTIR, DSC, and XRD, provided insights into the interface morphology, chemical composition, crystalline behavior, and structure of the composites. The SEM micrographs elucidated a progressive shift from clear interface boundaries to more homogenously blended states with increasing KH550 content, indicative of enhanced interaction between CG and PE. This comprehensive study demonstrates that KH550 modification offers a strategic approach to optimize CG-PE composites, showcasing potential applications in the automotive and construction industries. Those findings underscore the significance of surface modification techniques in enhancing composite properties and utilizing waste resources efficiently.

中文翻译：

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通过硅烷偶联剂介导的界面改性增强高填充煤矸石/聚乙烯复合材料的界面相容性

本研究探讨了使用硅烷偶联剂 KH550 进行表面改性对煤矸石 (CG)-聚乙烯 (PE) 复合材料的深远影响。目的是增强复合材料的性能，同时解决废料积累问题。综合分析阐明了界面形成的机制以及随后对复合材料性能的影响。使用 KH550 对 CG 进行表面改性对所得复合材料的物理、机械和热性能产生了显着影响。值得注意的是，偶联剂促进了与 CG 的共价键合，防止颗粒团聚并增强分散稳定性。 KH550 的引入有助于异相成核，增强复合材料的结晶度以及与树脂的界面结合，从而提高整体相容性。机械测试表明，最佳 KH550 含量可显着提高拉伸和弯曲强度。然而，过量的 KH550 导致收益递减，凸显了有效修改所需的关键平衡。热稳定性评估表明，KH550 改性后性能得到改善，验证了其在保护复合材料基体免受热降解方面的作用。微观结构分析（包括 SEM、FTIR、DSC 和 XRD）可深入了解复合材料的界面形态、化学成分、结晶行为和结构。 SEM 显微照片阐明了随着 KH550 含量的增加，从清晰的界面边界逐渐转变为更均匀的混合状态，表明 CG 和 PE 之间的相互作用增强。这项综合研究表明，KH550 改性提供了一种优化 CG-PE 复合材料的战略方法，展示了在汽车和建筑行业的潜在应用。这些发现强调了表面改性技术在增强复合材料性能和有效利用废物资源方面的重要性。