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Mller, M. ; Krause, B. ; Ptschke, P.
A successful approach to disperse MWCNTs in polyethylene by melt mixing using polyethylene glycol as additive

An additive-assisted one-step melt mixing approach was developed to produce nanocomposites based on linear low density polyethylene (LLDPE) with multiwalled carbon nanotube (MWCNT). The polymer granules, nanotube powder (2wt% Nanocyl NC7000) and 110wt% of the non-ionic additives poly(ethylene glycol) (PEG) or poly(ethylene oxide) (PEO) with molar masses between 100 g/mol and 100,000g/mol were simply fed together in the hopper of a small-scale DSM Xplore 15 twin-screw microcompounder. The produced MWCNT/LLDPE composites showed excellent MWCNT dispersion and highly improved electrical properties as compared to samples without the additive, whereas the effects depend on the amount and molar mass of the additive. When 7wt% PEG (2000g/mol) were used, a reduction of the electrical percolation threshold from 2.5wt% to 1.5wt% was achieved.

Polymer 53, 3079-3083


July 2012
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