Journal
POLYMER DEGRADATION AND STABILITY
Volume 96, Issue 10, Pages 1725-1731Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.polymdegradstab.2011.08.002
Keywords
Flame retardant; Carbon nanotubes; Intumescent flame retardant; PP
Categories
Funding
- National Science Foundation of China [50873092]
- National Basic Research Program of China [2011CB612307]
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Flame retardant mixtures of carbon nanotubes (CNTs) and intumescent flame retardant (IFR) were embedded in polypropylene (PP) to investigate what will happen if the additives exhibit two different flame retardation mechanisms. TEM tests showed that CNTs dispersed homogenously in PP matrix without any visible agglomeration. The effects of CNTs on thermal stability and flammability of PP were investigated by thermogravimetry (TG) and cone calorimetry tests, respectively. Results indicated that the introduction of CNTs only enhanced thermal stability of materials in a certain temperature range, but caused a severe deterioration of flame retardancy due to the interaction of the network structure and the intumescent carbonaceous char. Furthermore, conditions for an intumescent flame retardation system to behave with high efficiency were also discussed by a secondary combustion test. (C) 2011 Elsevier Ltd. All rights reserved.
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