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首页> 外文期刊>Journal of Vinyl & Additive Technology >Effect of Single-Mineral Filler and Hybrid-Mineral Filler Additives on the Properties of Polypropylene Composites
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Effect of Single-Mineral Filler and Hybrid-Mineral Filler Additives on the Properties of Polypropylene Composites

机译：单矿物填料和杂矿物填料对聚丙烯复合材料性能的影响

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摘要

The present study was carried out to determine the filler characteristics and to investigate the effects of three types of mineral fillers (CaCO3, silica, and mica) and filler loadings (10-40 wt%) on the properties of polypropylene (PP) composites. The characteristics of the particulate fillers, such as mean particle size, particle size distribution, aspect ratio, shape, and degree of crystallinity were identified. In terms of mechanical properties, for all of the filled PP composites, Young's modulus increased, whereas tensile strength and strain at break decreased as the filler loading increased. However, 10 wt% of mica in a PP composite showed a tensile strength comparable with that of unfilled PP. Greater tensile strength of mica/PP composites compared to that of the other composites was observed because of lower percentages of voids and a higher aspect ratio of the filler. Mica/PP also exhibited a Sower coefficient of thermal expansion (CTE) compared to that of the other composites. This difference was due to a lower degree of crystallinity of the filler and the CTE value of the mica filler. Scanning electron microscopy was used to examine the structure of fracture surfaces, and there was a gradual change in tensile fracture behavior from ductile to brittle as the filler loading increased. The nucleating ability of the fillers was studied with differential scanning calorimetry, and a drop in crystallinity of the composites was observed with the addition of mineral filler. Studies on the hybridization effect of different (silica and mica) filler ratios on the properties of PP hybrid composites showed that the addition of mica to silica-PP composites enhanced their tensile strength and modulus.
机译：进行本研究以确定填料特性，并研究三种类型的矿物填料（CaCO3，二氧化硅和云母）和填料含量（10-40 wt％）对聚丙烯（PP）复合材料性能的影响。确定了颗粒状填料的特征，例如平均粒径，粒径分布，长径比，形状和结晶度。在机械性能方面，对于所有填充的PP复合材料，杨氏模量均增加，而抗张强度和断裂应变随填料含量的增加而降低。然而，PP复合物中10重量％的云母显示出与未填充的PP相当的拉伸强度。由于较低的空隙百分比和较高的填料长径比，与其他复合材料相比，云母/ PP复合材料具有更高的拉伸强度。与其他复合材料相比，云母/ PP还具有较低的热膨胀系数（CTE）。这种差异是由于填料的结晶度较低和云母填料的CTE值所致。扫描电子显微镜用于检查断裂表面的结构，并且随着填料含量的增加，拉伸断裂行为从韧性到脆性逐渐变化。用差示扫描量热法研究了填料的成核能力，并且在加入矿物填料后观察到复合材料的结晶度下降。对不同比例（二氧化硅和云母）对聚丙烯杂化复合材料性能的影响的研究表明，在二氧化硅-聚丙烯复合材料中添加云母可以提高其拉伸强度和模量。

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