4.3 Article

Synergistic effects of zinc oxide in intumescent flame retardant silicone rubber composites

Journal

PLASTICS RUBBER AND COMPOSITES
Volume 42, Issue 9, Pages 374-378

Publisher

MANEY PUBLISHING
DOI: 10.1179/1743289813Y.0000000062

Keywords

Silicone rubber; ZnO; IFR; Flame retardant

Funding

  1. National Natural Science Foundation of China [51106078, 51206084]
  2. Outstanding Young Scientist Research Award Fund from Shandong Province [BS 2011CL018]

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The synergistic effects of zinc oxide (ZnO) with intumescent flame retardant (IFR; based on phosphorus acid, melamine and pentaerythritol) in silicone rubber (SR) composites have been studied using limiting oxygen index, UL-94, cone calorimeter test and digital photographs. The results showed that 2.0 wt-% loading ZnO in the flame retardant SR composites could greatly reduce the peak values of heat release rate and smoke production rate, and form a compact char layer on the surface of the sample. Thus, a suitable amount of ZnO plays a synergistic effect with IFR in flame retardant SR composites system.

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