Journal
JOURNAL OF REINFORCED PLASTICS AND COMPOSITES
Volume 32, Issue 14, Pages 1005-1017Publisher
SAGE PUBLICATIONS LTD
DOI: 10.1177/0731684413481508
Keywords
Polyethylene; clay; nanocomposites; flammability; WAXS; ammonium polyphosphate; melamine polyphosphate
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Funding
- Ministry of Science and Higher Education of Poland [NN209 186538]
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The article reports on flammability, thermal, and mechanical properties of bimodal high-density polyethylene/clay nanocomposites modified with ammonium polyphosphate or melamine polyphosphate (MPP) flame retardants. Two types of clays were used as fillers for the compositesthe first one was standard montmorillonite modified with quaternary ammonium salt (ZR2), and the second one was montmorillonite modified with aluminium hydrogen sulfate (ZG1). As a compatibilizer, maleic grafted polyethylene (Plb) was used. X-ray diffraction and transmission electron microscopy were used to characterize the layer structure of clays in the composites. The limiting oxygen index tests showed synergistic effect between both clays and MPP. Flammability was also examined using cone calorimetry technique. The influence of all the fillers on thermal stability (thermogravimetric analysis), crystallinity (differential scanning calorimetry and wide angle X-ray scattering techniques), and mechanical properties was also studied.
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