基于微力学模型的炭黑增强聚酯基复合材料弹性响应:界面相的作用

IF 4.2 Q2 NANOSCIENCE & NANOTECHNOLOGY
M. Karevan
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引用次数: 0

摘要

碳基增强材料在改善聚合物力学性能方面得到了广泛的报道。然而,将界面相互作用导致的界面相纳入分析预测工具的研究仍然很少。为了更好地理解界面相的影响,本研究将炭黑填充聚酯基复合材料的实验力学响应与微观力学模型得到的弹性行为进行了比较和关联。制备了含0 wt% ~ 10 wt% CB的聚酯增强模铸复合材料。为了确定协同重排区(CRR)的长度作为间相的度量,使用热力学模型对复合材料在玻璃化转变温度(Tg)范围内比热容或弛豫强度的变化进行了热研究。采用Halpin-Tsai和Tandon-Weng等微力学模型确定了相对于CB wt%和直径的杨氏模量以及相间厚度和模量。结果表明,该模型对界面相作为次级机制的存在具有敏感性,这与交联密度和界面键合有关。冲击结果表明,添加较高的填料时,由于界面键结破坏和形态研究证实的CBs团聚,抗冲击性降低。研究结果可以进一步用于解释碳基增强热固性复合材料弹性响应的变化,强调界面相的关键作用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Elastic response of Carbon Black reinforced polyester based composites using micromechanical models: Role of interphase
Carbon-based reinforcements have been widely reported in improving mechanical properties of polymers. However, still few studies exist on the incorporation of the interphase as a result of the interfacial interactions into analytical prediction tools. To better understand the effect of interfacial interphase, this study compares and correlates the experimental mechanical response of polyester based composites filled with carbon black (CB) with the elastic behavior obtained from the micromechanical models. Mold cast composites of polyester reinforced with 0 wt%–10 wt% of CB were fabricated. To determine the length of cooperative rearranging region (CRR) as a measure of the interphase, thermal studies focusing on the variations in the specific heat capacity or the relaxation strength of the composites around the glass transition temperature (Tg) range were performed using a thermodynamical model. Micromechanical models such as the Halpin-Tsai and Tandon-Weng were used to determine the Young’s modulus with respect to the CB wt% and diameter as well as the interphase thickness and modulus. The results exhibited the sensitivity of the models to the existence of the interphase as a secondary mechanism, which was correlated to the cross-link density and interfacial bonding. The impact results showed the decrease in the impact resistance upon the addition of higher filler loadings ascribed to the destroyed bonding at the interface and CBs agglomeration confirmed by morphological studies. The research results can be further utilized in the explanation of the changes in the elastic response of carbon-based reinforced thermosetting composites emphasizing the key role of interphase.
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来源期刊
CiteScore
6.00
自引率
1.70%
发文量
24
期刊介绍: Proceedings of the Institution of Mechanical Engineers Part N-Journal of Nanomaterials Nanoengineering and Nanosystems is a peer-reviewed scientific journal published since 2004 by SAGE Publications on behalf of the Institution of Mechanical Engineers. The journal focuses on research in the field of nanoengineering, nanoscience and nanotechnology and aims to publish high quality academic papers in this field. In addition, the journal is indexed in several reputable academic databases and abstracting services, including Scopus, Compendex, and CSA's Advanced Polymers Abstracts, Composites Industry Abstracts, and Earthquake Engineering Abstracts.
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