Micro-mechanical model of TPE made of polypropylene and rubber waste
Micro-mechanical model of TPE made of polypropylene and rubber waste
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DOI：
10.1016/j.polymer.2007.03.049
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发表时间：
2007-05
期刊：
影响因子：
4.6
通讯作者：
G. Ausias;S. Thuillier;B. Omnès;S. Wiessner;P. Pilvin
中科院分区：
文献类型：
--
作者：
G. Ausias;S. Thuillier;B. Omnès;S. Wiessner;P. Pilvin
本研究的目的是进行实验表征并开发由聚丙烯和橡胶废料颗粒制成的热塑性弹性体的微机械模型。扫描电子显微镜观察表明，弹性体颗粒平均尺寸为250μm，嵌入聚丙烯基质中。通过一系列由不同应变率和松弛步骤下的载荷组成的拉伸测试来研究机械行为。本构方程是在一个自洽方案中建立的，包括两相的机械行为。基质被建模为弹粘塑性固体，橡胶被建模为弹性固体。材料系数是使用反演方法确定的。本文提出了微机械模型的第一个版本，并与实验结果进行了比较。
The aim of this study is to conduct experimental characterization and to develop a micro-mechanical model for thermoplastic elastomers made of polypropylene and particles of rubber waste. Observations by means of Scanning Electron Microscope showed that the elastomer particles have an average dimension of 250μm and are embedded in a polypropylene matrix. The mechanical behaviour is studied through a series of tensile tests composed of loadings at different strain rates and relaxation steps. The constitutive equations were established within a self-consistent scheme including the mechanical behaviour of the two phases. The matrix is modelled as an elastoviscoplastic solid and the rubber as an elastic solid. Material coefficients have been determined using an inverse method. This paper presents a first version of the micro-mechanical model and a comparison with experimental results.