Relationship between microstructure evolution and properties enhancement of carbon nanotubes‐filled polybutylene terephthalate/polypropylene blends induced by thermal annealing

Shang, Mengyao; Gao, Zhuyi; Cheng, Henglun; Wu, Chinan; Shentu, Baoqing

doi:10.1002/app.51689

Title: Relationship between microstructure evolution and properties enhancement of carbon nanotubes‐filled polybutylene terephthalate/polypropylene blends induced by thermal annealing

Journal Article · 20 September 2021 · Journal of Applied Polymer Science

DOI: https://doi.org/10.1002/app.51689 · OSTI ID:1830250

Shang, Mengyao ^[1]; Gao, Zhuyi ^[1]; Cheng, Henglun ^[1]; Wu, Chinan ^[1];

^[1]

State Key Lab of Chemical Engineering College of Chemical and Biological Engineering, Zhejiang University Hangzhou China

Abstract Thermal annealing induced microstructure evolution and properties enhancement of polybutylene terephthalate/polypropylene/carbon nanotubes (PBT/PP/CNTs) nanocomposites was methodically investigated. The electrical conductive PBT/PP/CNTs nanocomposites with a low percolation threshold were obtained by simple melt blending due to the selective location of the CNTs in PBT phase and the formation of the double percolation structure. Thermal annealing further remarkably decreased the volume resistivity of the nanocomposites, with the maximum reduction of seven orders of magnitude. Scanning electron microscope observation and rheology tests demonstrated that the relatively large CNTs agglomerates were redistributed to build more homogeneous CNTs networks after annealing. The phase coalescence during annealing promoted the formation of the more perfect co‐continuous structure. These phenomena helped to enhance the electrical conductivity of the nanocomposites. Flexural properties of the nanocomposites were also enhanced after annealing, which might be due to the more effective stress transfer between the polymer and CNTs induced by the reconstructed CNTs networks. The nanocomposites obtained in this study possess excellent electrical and mechanical properties, which can be applied to the fields of sensors, electromagnetic interference shielding, anti‐static materials, and so forth.

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Sponsoring Organization:: USDOE

OSTI ID:: 1830250

Journal Information:: Journal of Applied Polymer Science, Journal Name: Journal of Applied Polymer Science Journal Issue: 8 Vol. 139; ISSN 0021-8995

Publisher:: Wiley Blackwell (John Wiley & Sons)Copyright Statement

Country of Publication:: United States

Language:: English

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