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首页> 外文期刊>Проблемы прочностиПроблемы прочности: на рус．укр．и анг．языках >Morphology and Mechanical Properties of PP/LLDPE Blends and Ternary PP/LLDPE/ nano-CaCO_3 Composites
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Morphology and Mechanical Properties of PP/LLDPE Blends and Ternary PP/LLDPE/ nano-CaCO_3 Composites

机译：PP / LLDPE共混物和三元PP / LLDPE /纳米CaCO_3复合材料的形貌和力学性能

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摘要

Mechanical and morphological properties of polypropylene (PP)/linear low density polyethylene (LLDPE)/ nano-sized calcium carbonate ternary composites were prepared using a twin-screw extruder. Modification of the filler nano-particle surface was pretreated with stearic acid and of the PP/LLDPE interface by melting high crystallizable, high density polyethylene. In this research, effects of modified linear low density polyethylene (LD) and nano-CaCO_3 weight percentage on tensile strength, Young's modulus and impact absorbed energy of composites were investigated. In addition, effect of the interaction between filler particles and polymer matrix was studied. Effect of quantity of micro-cracks on tensile properties of the composites was also discussed. Effect of nano-CaCO_3 and LD on the quantity of microcracks and impact-fractured surface of PP composites was studied by scanning electron microscope (SEM). The impact-fractured surface morphologies were characterized by SEM to clarify the possible mechanisms for improving the fracture resistance.
机译：使用双螺杆挤出机制备了聚丙烯（PP）/线性低密度聚乙烯（LLDPE）/纳米级碳酸钙三元复合材料的力学和形态学性能。填料纳米颗粒表面的改性通过硬脂酸和PP / LLDPE界面的预处理，方法是将高结晶度，高密度聚乙烯熔融。在这项研究中，研究了改性的线性低密度聚乙烯（LD）和纳米CaCO_3重量百分比对复合材料的拉伸强度，杨氏模量和冲击吸收能的影响。另外，研究了填料颗粒与聚合物基体之间相互作用的影响。还讨论了微裂纹数量对复合材料拉伸性能的影响。通过扫描电子显微镜（SEM）研究了纳米CaCO_3和LD对PP复合材料微裂纹数量和冲击断裂表面的影响。用SEM表征了冲击断裂的表面形态，以阐明改善断裂强度的可能机理。

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