Journal
COMPOSITES SCIENCE AND TECHNOLOGY
Volume 93, Issue -, Pages 54-60Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compscitech.2013.12.022
Keywords
Layered structures; Polymer matrix composites (PMCs); Mechanical properties; Extrusion; Flame-retarding properties
Categories
Funding
- National Natural Science Foundation of China [51203097, 51227802, 51073099]
- Applied Basic Research Foundation of Sichuan Province
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The multilayered distribution of intumescent flame retardants (IFRs) was obtained by fabricating a series of alternating multilayered composites consisting of polypropylene (PP) and IFR-filled PP (PPFR) layers through a layer-multiplying coextrusion technology. With increasing the layer numbers, the limiting oxygen index (LOI) and elongation at break (epsilon(b)) of the multilayered composites were enhanced, accompanied with the gradually decreased values of the peak heat release rate and the total heat release. When the layer numbers beyond 16, the LOI and epsilon(b) values were even larger than those of the PP/IFR conventional composite filled with the same content of IFRs. The layer interfaces and confined layer spaces in the multilayered system were considered to play a crucial role in retarding the spread of fire as well as the propagation of crazes. The significance of this work was providing an optimal route to fabricate flame-retarding composites with excellent mechanical properties. (C) 2014 Elsevier Ltd. All rights reserved.
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