Rheological Study on the Gel-like Behaviour of Carbon Nanotube/Polypropylene Composites: Effect of Interfacial Adhesion

Yongzheng Pan, Xue Shuang Chan, Lin Li
2013 Nihon Reoroji Gakkaishi  
The effect of interfacial adhesion between multiwalled carbon nanotubes (MWCNTs) and the polypropylene (PP) matrix on the gel-like behaviour of the MWCNT/PP is studied. Two kinds of composites with different nanotubepolymer interactions, e.g. MWCNT/polypropylene-grafted-maleic anhydride (PP-g-MA)/polypropylene and functionalized MWCNT (MWCNT-COOH)/PP-g-MA/PP, are prepared by melt mixing. The two composites exhibit significant differences in morphological and rheological properties. The
more » ... ambon method is successfully demonstrated as an effective tool to study the gel-like behavior and percolation threshold of CNT/polymer composite systems. This method accurately reveals the gel content (c g ) and quantitatively provides the gel strength S g and exponent n of the two composites, which proves that the increased interfacial adhesion between MWCNT-COOH and the polymer matrix served a key for changing the rheological properties.
doi:10.1678/rheology.41.121 fatcat:wggztg4hprdbzcil7vym7yyulm