Journal
POLYMERS
Volume 11, Issue 11, Pages -Publisher
MDPI
DOI: 10.3390/polym11111852
Keywords
poly(butylene succinate) (PBS); carbon black (CB); solid-state ScCO2 foaming; lightweight; good electrical conductivity
Categories
Funding
- National Natural Science Foundation of China [51803062, 51804169]
- Natural Science Foundation of Guangdong Province [2018A030310379, 2019A1515012125]
- Natural Science Foundation of the Jiangsu Province [BK20180715]
- Science and Technology Program of Guangzhou [201904010272]
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Lightweight, high-strength and electrically conductive poly(butylene succinate) (PBS)/ carbon black (CB) nanocomposite foams with a density of 0.107-0.344 g/cm(3) were successfully fabricated by a solid-state supercritical CO2 (ScCO2) foaming process. The morphology, thermal and dynamic mechanical properties, and rheological behavior of the PBS/CB nanocomposites were studied. The results indicate that the CB nanofiller was well dispersed in the PBS matrix and the presence of a proper CB nanofiller can accelerate the rate of crystallization, improve the thermal stability, enhance the stiffness, and increase the complex viscosity of PBS/CB nanocomposites. These improved properties were found to play an important role in the foaming process. The results from foaming experiments showed that the PBS/CB nanocomposite foams had a much smaller cell size, a higher cell density, and a more uniform cell morphology as compared to neat PBS foams. Furthermore, the PBS/CB nanocomposite foams also possessed low density (0.107-0.344 g/cm(3)), good electrical conductivity (0.45 S/cm at 1.87 vol % CB loading), and improved compressive strength (108% increase), which enables them to be used as lightweight and high-strength functional materials.
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