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首页> 美国卫生研究院文献>Materials >The Structure and Performance of Short Glass Fiber/High-Density Polyethylene/Polypropylene Composite Pipes Extruded Using a Shearing–Drawing Compound Stress Field
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The Structure and Performance of Short Glass Fiber/High-Density Polyethylene/Polypropylene Composite Pipes Extruded Using a Shearing–Drawing Compound Stress Field

机译：剪拉复合应力场挤压短玻璃纤维/高密度聚乙烯/聚丙烯复合管的结构和性能

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摘要

Glass fiber reinforced polyolefin composite materials have many advantages regarding their performance and have been widely used in many fields. However, there are few reports on the simultaneously bidirectional self-enhancement of glass fiber reinforced polyethylene/polypropylene composite pipe. To self-reinforce the pipe’s circular and axial properties simultaneously, short glass fiber reinforced high-density polyethylene/polypropylene (SGF/HDPE/PP) pipes were extruded using a shearing–drawing two-dimensional compound stress field pipe-extrusion device. The effects of the rotating speed of the rotating shear sleeve on the orientation, heat behavior, microstructure, and tensile strength of the pipe were investigated in this paper. The microstructure was observed using scanning electron microscopy (SEM), and the crystal diffraction was analyzed using a polycrystalline X-ray diffractometer (WAXD), the heat behavior was measured using a differential scanning calorimeter (DSC), and the tensile strength was tested using a universal electronic tensile testing machine. The results showed that the shear induction effect induced by the shear rotating promoted the formation of the oriented structure of the crystal plate and SGFs along the circular and axial directions of the pipe simultaneously. Furthermore, it increased the crystallinity of the system, and self-improved the pipe’s circular and axial tensile strength at the same time.
机译：玻璃纤维增​​强聚烯烃复合材料在其性能方面具有许多优点，并且已在许多领域中得到广泛使用。但是，关于玻璃纤维增​​强聚乙烯/聚丙烯复合管同时双向自增强的报道很少。为了同时自增强管道的圆形和轴向性能，使用剪切-拉伸二维复合应力场管道挤出装置挤出短玻璃纤维增​​强的高密度聚乙烯/聚丙烯（SGF / HDPE / PP）管道。研究了旋转剪切套筒的旋转速度对管道的取向，热行为，微观结构和拉伸强度的影响。使用扫描电子显微镜（SEM）观察其微观结构，并使用多晶X射线衍射仪（WAXD）分析晶体衍射，使用差示扫描量热仪（DSC）测量热性能，并使用万能的电子拉伸试验机。结果表明，剪切旋转引起的剪切诱导效应促进了晶体板和SGFs沿管的圆周和轴向同时形成取向结构。此外，它提高了系统的结晶度，并同时自我提高了管道的圆形和轴向拉伸强度。

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