Tuning the distribution of carbon nanotubes in styrene–acrylonitrile copolymer by a small amount of polycarbonate

IF 2.8 4区工程技术 Q2 POLYMER SCIENCE

Macromolecular Research Pub Date : 2023-12-20 DOI:10.1007/s13233-023-00229-3

Junmin Lee, Hyungsu Kim

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Abstract

In this study, we added a small amount of polycarbonate (PC), ranging from 1 to 9 wt%, to the composites of styrene–acrylonitrile copolymer (SAN) and multiwalled carbon nanotube (MWNT). When two types of SANs having 24 and 32 wt% AN (SAN24 and SAN32) were used, we found that the resistivity of the SAN/MWNT (0.5 wt%) composites significantly decreased with the addition of 1–3% of PC, and the effect was more pronounced in the case of SAN32. Transmission electron microscopy (TEM) images revealed that MWNTs, which were uniformly distributed on the pure SAN, tended to agglomerate and form an interconnected structure when an appropriate amount of PC was added. The reduced resistivity of the composites is mainly attributed to the connectivity of MWNTs facilitating electron transport. It is worth noting that the network structure disappears when the amount of PC exceeds 5 wt%, where the size of PC domains grows, and most of the MWNTs are entrapped in the PC phase, resulting in an increased resistivity of the composite. The rheological investigation of the composites revealed that the storage moduli of the composites were sensitive to the state of MWNT distribution, which was greatly altered by the type of SAN and the amount of PC.

Graphical abstract

Alteration of carbon nanotubes distribution in styrene–acrylonitrile due to the introduction of polycarbonate

Abstract Image

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用少量聚碳酸酯调节苯乙烯-丙烯腈共聚物中碳纳米管的分布

在这项研究中，我们在苯乙烯-丙烯腈共聚物（SAN）和多壁碳纳米管（MWNT）的复合材料中添加了少量聚碳酸酯（PC），添加量从 1 wt% 到 9 wt% 不等。在使用 AN 含量分别为 24 和 32 wt%（SAN24 和 SAN32）的两种 SAN 时，我们发现 SAN/MWNT （0.5 wt%）复合材料的电阻率随着 PC 的添加量增加 1-3% 而显著降低，其中 SAN32 的影响更为明显。透射电子显微镜（TEM）图像显示，纯 SAN 上均匀分布的 MWNT 在添加适量 PC 后趋于聚集并形成相互连接的结构。复合材料电阻率降低的主要原因是 MWNTs 的连通性促进了电子传输。值得注意的是，当 PC 的用量超过 5 wt% 时，网络结构就会消失，此时 PC 结构域的尺寸会增大，大部分 MWNT 被包裹在 PC 相中，从而导致复合材料的电阻率增大。对复合材料的流变学研究表明，复合材料的存储模量对 MWNT 的分布状态非常敏感，SAN 的类型和 PC 的用量会极大地改变 MWNT 的分布状态。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Macromolecular Research 工程技术-高分子科学

CiteScore

4.70

自引率

8.30%

发文量

100

审稿时长

1.3 months

期刊介绍： Original research on all aspects of polymer science, engineering and technology, including nanotechnology Presents original research articles on all aspects of polymer science, engineering and technology Coverage extends to such topics as nanotechnology, biotechnology and information technology The English-language journal of the Polymer Society of Korea Macromolecular Research is a scientific journal published monthly by the Polymer Society of Korea. Macromolecular Research publishes original researches on all aspects of polymer science, engineering, and technology as well as new emerging technologies using polymeric materials including nanotechnology, biotechnology, and information technology in forms of Articles, Communications, Notes, Reviews, and Feature articles.