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首页> 外文期刊>Journal of Applied Polymer Science >Thermal aging kinetic and effects on mechanical behavior of fully recycled composite based on polypropylene/polyethylene blend
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Thermal aging kinetic and effects on mechanical behavior of fully recycled composite based on polypropylene/polyethylene blend

机译：基于聚丙烯/聚乙烯混合物的全再循环复合材料的热老化动力学和对机械性能的影响

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The effect of thermal oxidation of a fully recycled carbon fibers reinforced stabilized polypropylene/polyethylene blend on the mechanical properties has been studied at 120, 130 and 140 degrees C. In a first step, several analyses by FTIR and UV spectrometry and differential scanning calorimetry were performed in order to detect and monitor the evolution of the antioxidants and oxidation products in the materials. This approach aims to well understand and identify the aging mechanisms that will be modeled in a second step in a kinetic model capable of predicting the evolution of carbonyl build-up while taking into account the presence of the different antioxidants. Modeling results showed a good correlation between the kinetic behavior and the obtained experimental data. Furthermore, the effect of thermal aging on the mechanical behaviors of the composite and the matrix were studied at the macroscopic scale at different strain rates. It has been shown that the thermal oxidation affects only the elongation at break. The numerical values of the oxidation products generated by the kinetic model allowed linking the evolution of the mechanical behavior under aging with the physicochemical state of the material. (c) 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46640.
机译：在120,130和140℃下，研究了全再循环碳纤维增强稳定的聚丙烯/聚乙烯混合物对机械性能的热氧化的影响。在第一步中，通过FTIR和UV光谱和差示扫描量热法分析了几种分析进行以检测和监测材料中抗氧化剂和氧化产品的演变。这种方法旨在良好地理解和鉴定将在能够预测羰基的演变的动力学模型中的第二步中建模的老化机制，同时考虑到不同抗氧化剂的存在。建模结果表明动力学行为与所得的实验数据之间的良好相关性。此外，在不同应变率的宏观尺度下研究了热老化对复合材料的机械行为和基质的影响。已经表明，热氧化仅影响断裂时的伸长率。动力学模型产生的氧化产物的数值允许将老化下的机械行为的演变与材料的物理化学元件连接。 （c）2018 Wiley期刊，Inc.J.Phill。聚合物。 SCI。 2018,135,46640。

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