Effect of sulfur on the rheological properties and phase structure of polycarbonate/ poly(styrene-co-acrylonitrile)/multiwalled carbon nanotube composites

다국어 초록 (Multilingual Abstract)

Elemental sulfur has been introduced to the suspensions of polycarbonate (PC), poly(styrene-co-acrylonitrile) (SAN) and multi-walled carbon nanotubes (MWCNT). A particular interest was focused on the effect of sulfur diradicals on the rheological properties and phase structure of the sonicated composites. The melt viscosities, elasticities, and relaxation moduli of the PC/SAN/MWCNT composites were significantly increased by sulfur during the sonication of less than 10 min. In the morphological analysis, the MWCNTs were found to be located at the interface of PC/SAN and inside of SAN domains as well, which is contrary to the prediction of wetting coefficient criteria. Interestingly, the volume resistivity of the composites was improved by the addition of sulfur. The unique features found in the sulfur added composites of PC/SAN/ MWCNT are explained by the state of MWCNT dispersion and interfacial effects.

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