Mojtaba Mohammadi, Mohammadreza Nofar and Pierre Carreau
Article (2024)
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Abstract
Blend nanocomposites of amorphous polylactide (aPLA) and semicrystalline PLA (scPLA)-multiwalled carbon nanotubes (MWCNTs) were prepared by a twin-screw extruder below the melting temperature of the scPLA. The maximum weight percent of MWCNTs in the blends was 0.9 wt.%. The extrudates were either pelletized immediately or after drawing at a drawing ratio of about 10. According to small amplitude oscillatory shear rheological analysis, the rheological properties of the aPLA/scPLA (85/15 wt.%) drawn sample were significantly increased compared to the undrawn samples. With the presence of MWCNTs, more crystallites could develop in the scPLA, and the electrical conductivity of the aPLA/scPLA nanocomposites was reduced due to the encapsulation of MWCNTs within the crystallites of scPLA. Increasing the temperature during compression moulding to 190°C, which is above the melting temperature of the scPLA, effectively removed this obstacle and the electrical conductivity was increased by a factor of up to 106 compared to the samples moulded at 150°C.
Uncontrolled Keywords
amorphous polylactide (aPLA); electrical properties; multiwalled carbon nanotubes(MWCNTs); PLA blend nanocomposites; rheological properties; semicrystalline PLA(scPLA); thermal properties
Subjects: | 1800 Chemical engineering > 1800 Chemical engineering |
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Department: | Department of Chemical Engineering |
Research Center: | CREPEC - Center for Applied Research on Polymers and Composites |
Funders: | NSERC / CRSNG, İstanbul Technical University Scientific Research Project (ITU-BAP) |
Grant number: | 43627 |
PolyPublie URL: | https://publications.polymtl.ca/59137/ |
Journal Title: | The Canadian Journal of Chemical Engineering |
Publisher: | Wiley Blackwell |
DOI: | 10.1002/cjce.25463 |
Official URL: | https://doi.org/10.1002/cjce.25463 |
Date Deposited: | 04 Sep 2024 15:39 |
Last Modified: | 26 Sep 2024 22:07 |
Cite in APA 7: | Mohammadi, M., Nofar, M., & Carreau, P. (2024). Properties of blends of amorphous and semicrystalline <scp>PLAs</scp> containing multiwalled carbon nanotubes. The Canadian Journal of Chemical Engineering, 25463 (12 pages). https://doi.org/10.1002/cjce.25463 |
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