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

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 S...

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Bibliographic Details
Published in:Macromolecular research 2024, 32(4), , pp.349-358
Main Authors: Lee, Junmin, Kim, Hyungsu
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Chemistry
Chemistry and Materials Science
Complex Fluids and Microfluidics
Composite materials
Copolymers
Electrical resistivity
Electron transport
Multi wall carbon nanotubes
Nanochemistry
Nanotechnology
Physical Chemistry
Polycarbonate resins
Polymer Sciences
Rheological properties
Soft and Granular Matter
Styrene acrylonitrile resins
Styrenes
고분자공학
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Summary: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
ISSN:1598-5032
2092-7673
DOI:10.1007/s13233-023-00229-3