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首页> 外文期刊>Journal of Applied Polymer Science >Mechanical and viscoelastic properties of polyethylene-based microfibrillated composites from 100% recycled resources
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Mechanical and viscoelastic properties of polyethylene-based microfibrillated composites from 100% recycled resources

机译：100％再循环资源的聚乙烯基微纤维复合材料的机械和粘弹性性能

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摘要

In this study, recycled polyethylene (rPE) based microfibrillated composites (MFCs) were developed while incorporating recycled poly(ethylene terephthalate) (rPET) and recycled polyamide 6 (rPA) as the reinforcing fibrillar phases at a given weight ratio of 80 wt% (rPE)/20 wt% (rPET or rPA). The blends were first melt processed using a twin-screw extruder. The extrudates were then cold stretched at a drawing ratio of 2.5 to form rPET and rPA fibrillar structures. Next, the pelletized drawn samples were injection molded at the barrel temperatures below the melting temperatures of rPET and rPA. The tensile, three-point bending, impact strength, dynamic thermomechanical, and rheological properties of the fabricated MFCs were analyzed. The effects of injection molding barrel temperature (i.e., 150 degrees C and 190 degrees C) and extrusion melt processing temperature (i.e., 250 degrees C and 275 degrees C) on the generated fibrillar structure and the resultant properties were explored. A strong correlation between the fibrillar morphology and the mechanical properties with the extrusion and injection molding temperatures was observed. Moreover, the ethylene/n-butyl acrylate/glycidyl methacrylate (EnBAGMA) terpolymer and maleic anhydride grafted PE (MAH-g-PE) were, respectively, melt processed with rPE/rPET and rPE/rPA6 blends as compatibilizers. The compatibilizers refined the fibrillar structure and remarkably influenced mechanical properties, specifically the impact strength.
机译：在本研究中，以80 wt%（rPE）/20 wt%（rPET或rPA）的给定重量比，将回收的聚对苯二甲酸乙二醇酯（rPET）和回收的聚酰胺6（rPA）作为增强纤维相，开发了基于回收聚乙烯（rPE）的微纤化复合材料（MFC）。首先使用双螺杆挤出机对共混物进行熔融处理。然后以2.5的拉伸比对挤出物进行冷拉伸，以形成rPET和rPA纤维结构。接下来，在低于rPET和rPA熔融温度的筒体温度下注射成型造粒的拉制样品。分析了所制备MFC的拉伸、三点弯曲、冲击强度、动态热机械性能和流变性能。研究了注射成型机筒温度（150℃和190℃）和挤出熔体加工温度（250℃和275℃）对生成的纤维结构和产物性能的影响。观察到纤维形态和机械性能与挤出和注射成型温度之间存在很强的相关性。此外，乙烯/丙烯酸正丁酯/甲基丙烯酸缩水甘油酯（EnBAGMA）三元共聚物和马来酸酐接枝PE（MAH-g-PE）分别以rPE/rPET和rPE/rPA6共混物作为相容剂进行熔融处理。增容剂细化了纤维结构，显著影响了机械性能，尤其是冲击强度。

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