Polypropylene (PP) and polyethylene terephthalate (PET) are the two most widely used plastics, which are not compatible with recycling as a blend. In this research work, two different compositions of recycled PP/PET ribbon 65/35 (v/v %) and 78/22 (v/v%) along with 5% (wt%) of polypropylene‐grafted maleic anhydride (PP‐g‐MAH) as compatibilizer were blended, 2– 5 wt% of carbon fiber (CF) was further added for reinforcement. The compositions of these materials are mechanically mixed and extruded by a twin‐screw extruder to make pellets. These pellets are then used to produce standard samples by injection molding for evaluation. The molded samples were tested under tensile, flexural and impact loads to evaluate mechanical properties. Scanning electron microscopy (SEM) was conducted on the fracture surface of the impact‐tested samples to understand polymer blend morphology. Differential scanning calorimetry (DSC) and dynamic mechanical analysis (DMA) also carried out to check the thermal properties, mainly transition temperatures (T_g) and heat flow. These test results compared, which show substantial improvement in mechanical properties by adding CF and compatibilizer, without much change in transition temperatures. POLYM. ENG. SCI., 60:575–580, 2020. © 2019 Society of Plastics Engineers

中文翻译：

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聚对苯二甲酸乙二醇酯再生碳带和碳增强相容聚丙烯的机械和热性能评估

聚丙烯（PP）和聚对苯二甲酸乙二酯（PET）是两种使用最广泛的塑料，它们不能与混合物作为回收物相容。在这项研究工作中，再生PP / PET碳带65/35（v / v％）和78/22（v / v％）的两种不同成分以及5％（wt％）聚丙烯接枝的马来酸酐（PP- g – MAH）作为增容剂，掺混了2– 5 wt％的碳纤维（CF）进一步添加以进行加固。将这些材料的成分机械混合并通过双螺杆挤出机挤出以制成颗粒。然后将这些粒料用于通过注塑成型生产标准样品以进行评估。模制样品在拉伸，弯曲和冲击载荷下进行测试，以评估机械性能。在冲击测试样品的断裂表面上进行了扫描电子显微镜（SEM），以了解聚合物共混物的形态。还进行了差示扫描量热法（DSC）和动态力学分析（DMA）来检查热性能，主要是转变温度（T _g）和热流。比较了这些测试结果，结果表明通过添加CF可以显着改善机械性能和增容剂，转变温度没有太大变化。POLYM。ENG。SCI。，60：575–580，2020.©2019塑料工程师协会