Journal
MACROMOLECULAR MATERIALS AND ENGINEERING
Volume 298, Issue 12, Pages 1322-1334Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/mame.201200433
Keywords
extrusion; flame retardance; graphene; nanocomposite; polypropylene
Funding
- BMBF as a part of the FUNgraphen project [03X0111A, 03X0111C]
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Functionalized graphene nanosheets TRGO and MLG 250, prepared from thermally reduced graphite oxide, represent attractive carbon additives for improving the performance of flame retardant polypropylene (PP-FR). The influence of carbon nanofiller type and content on morphology, thermal, mechanical, and electrical properties as well as the fire behavior of melt-extruded PP-FR is investigated. In contrast to conventional nano- and micron-sized carbon fillers such as expanded graphite (EG 40), nano-scaled carbon black (CB), and multiwall carbon nanotubes (CNT), only TRGO and MLG 250 afford uniform dispersion combined with simultaneously improved stiffness (+80%), electrical conductivity (3x10(-5) Scm(-1)) and enhanced flame retardancy of PP-FR, as expressed by lower peak heat release rate (-76%).
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