CNT reinforced PEI and PEEK nanocomposites: A comparison on the thermal and rheological properties

IF 5 2区材料科学 Q1 MATERIALS SCIENCE, CHARACTERIZATION & TESTING Polymer Testing Pub Date : 2024-08-01 DOI:10.1016/j.polymertesting.2024.108519

Fulden Kayginok , Merve Karabal , Alptekin Yıldız , Hulya Cebeci

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Abstract

Multifunctionality brought by nanomaterials such as carbon nanotubes (CNTs) to high-performance thermoplastics brings several opportunities for tuning the properties in advanced applications. Here, polyetherimide (PEI) and polyether ether ketone (PEEK), amorphous and semi-crystalline polymers, were chosen to explore the thermal transitions and rheology linked to morphological properties of CNT-reinforced PEI and PEEK nanocomposites. A custom-built twin-screw extruder was employed to manufacture the CNT/PEI and CNT/PEEK nanocomposites at 1, 3, and 5 wt%. The thermal stability and glass transition temperature ( $T_{g}$ ) of nanocomposites were not significantly affected; however, the crystallization ratio of the PEEK nanocomposites was increased to 29.3% for 1 wt% CNT/PEEK. Rheological analysis showed that storage modulus was enhanced in both polymers. Rheological percolation was considered to be below 1 wt% CNT for both PEI and PEEK. The lowest shear-thinning exponents were found as 0.35 and 0.26 between $1 0^{2}$ and $1 0^{3}$ rad/s for 5 wt% CNT/PEI and CNT/PEEK, respectively.

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CNT 增强 PEI 和 PEEK 纳米复合材料：热性能和流变性能比较

碳纳米管（CNT）等纳米材料为高性能热塑性塑料带来的多功能性，为调整其在先进应用中的性能带来了许多机会。在此，我们选择了聚醚酰亚胺（PEI）和聚醚醚酮（PEEK）这两种无定形和半结晶聚合物，来探索碳纳米管增强 PEI 和 PEEK 纳米复合材料的热转变和流变学与形态特性之间的联系。采用定制的双螺杆挤出机制造了 1、3 和 5 wt% 的 CNT/PEI 和 CNT/PEEK 纳米复合材料。纳米复合材料的热稳定性和玻璃化转变温度（Tg）没有受到明显影响；但是，当 CNT/PEEK 的重量百分比为 1 时，PEEK 纳米复合材料的结晶率增加到 29.3%。流变分析表明，两种聚合物的存储模量都有所提高。对于 PEI 和 PEEK 而言，流变渗流被认为低于 1 wt% CNT。在 102 和 103 rad/s 之间，5 wt% CNT/PEI 和 CNT/PEEK 的剪切稀化指数最低，分别为 0.35 和 0.26。

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来源期刊

Polymer Testing 工程技术-材料科学：表征与测试

CiteScore

10.70

自引率

5.90%

发文量

328

审稿时长

44 days

期刊介绍： Polymer Testing focuses on the testing, analysis and characterization of polymer materials, including both synthetic and natural or biobased polymers. Novel testing methods and the testing of novel polymeric materials in bulk, solution and dispersion is covered. In addition, we welcome the submission of the testing of polymeric materials for a wide range of applications and industrial products as well as nanoscale characterization. The scope includes but is not limited to the following main topics: Novel testing methods and Chemical analysis • mechanical, thermal, electrical, chemical, imaging, spectroscopy, scattering and rheology Physical properties and behaviour of novel polymer systems • nanoscale properties, morphology, transport properties Degradation and recycling of polymeric materials when combined with novel testing or characterization methods • degradation, biodegradation, ageing and fire retardancy Modelling and Simulation work will be only considered when it is linked to new or previously published experimental results.