The mechanisms of reinforcement of polypropylene by graphene nanoplatelets
The mechanisms of reinforcement of polypropylene by graphene nanoplatelets
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DOI：
10.1016/j.mseb.2016.10.003
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发表时间：
2017-02-01
影响因子：
3.6
通讯作者：
Young, Robert J.
中科院分区：
文献类型：
--
作者：
Ahmad, Siti Rohana;Xue, Chengzhe;Young, Robert J.
详细分析了石墨烯纳米片（GNP）对聚丙烯（PP）的增强机理。PP/GNP纳米复合材料的加工通过熔融混合，然后注射成型和微观结构进行了充分的表征。结果表明，GNPs的加入提高了PP的热稳定性，有利于PP的结晶成核。的纳米复合材料的力学性能进行了评估，使用拉伸测试和动态力学热分析。GNP的加入导致PP的杨氏模量显著增加，同时屈服应力降低，断裂伸长率降低。从PP基质到GNP增强体的应力转移是从应力诱导的2D拉曼谱带的位移进行的，并且发现纳米复合材料中GNP的有效杨氏模量为约100 GPa，显示与预期值一致。(C)2016爱思唯尔B. V.保留所有权利。
A detailed analysis has been undertaken of the mechanisms of reinforcement of polypropylene (PP) by the addition of graphene nanoplatelets (GNP). The PP/GNP nanocomposites were processed by melt mixing followed by injection moulding and microstructure was fully characterized. It was found that the GNPs increased the thermal stability of the PP and aided crystal nucleation. The mechanical properties of the nanocomposites were evaluated using both tensile testing and dynamic mechanical thermal analysis. The addition of GNPs led to a significant increase in the Young's modulus of the PP, coupled with a decrease in the yield stress and a reduction in the elongation to failure. Stress transfer from the PP matrix to the GNP reinforcement was followed from stress-induced shifts of the 2D Raman band and the effective Young's modulus of the GNPs in the nanocomposites was found to be about 100 GPa, shown to be consistent with the expected value. (C) 2016 Elsevier B.V. All rights reserved.