Abstract
The role played by multiwalled carbon nanotubes (MWCNTs) coated with poly(3,4-ethylenedioxythiophene)/poly(styrenesulfonate) (PEDOT/PSS) in the thermal and mechanical properties of polycarbonate (PC) nanocomposites was analyzed. We used differential scanning calorimetry (DSC) and dynamic mechanical analysis (DMA) to demonstrate that the glass transition temperature of polycarbonate nanocomposites decreased whereas the storage modulus of the samples increased by including PEDOT/PSS-coated MWCNTs. These results indicated that PEDOT/PSS acts as an antiplasticizer. We attributed the enhancement of the storage modulus to the strong hydrogen bonding between PSS and the PC matrix and the reduction of the free volume in the PC matrix due to the shrinkage of PEDOT/PSS upon heating. We also investigated changes in the thermal conductivity and thermal degradation behavior of the nanocomposites. The results indicated that PEDOT/PSS did not play a significant role in improving the thermal conductivity and thermal stability of PC nanocomposites. The relative improvements in the conductivity and thermal stability of the samples that contained PEDOT/PSS were attributed to the better dispersion of the MWCNTs in the PC matrix. © 2014 American Chemical Society.
Original language | English (US) |
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Pages (from-to) | 3539-3549 |
Number of pages | 11 |
Journal | Industrial & Engineering Chemistry Research |
Volume | 53 |
Issue number | 9 |
DOIs | |
State | Published - Feb 21 2014 |
Bibliographical note
KAUST Repository Item: Exported on 2020-10-01Acknowledgements: The authors gratefully acknowledge financial support received from KAUST, the BOEING company, and SABIC.
ASJC Scopus subject areas
- General Chemical Engineering
- General Chemistry
- Industrial and Manufacturing Engineering