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Influence of clays on the flame retardancy and high temperature viscoelastic properties of polymeric intumescent formulations |
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| Authors: | Simone PS Ribeiro Celeste Pereira Regina SV Nascimento |
| Institution: | a Instituto de Química - DQO, Universidade Federal do Rio de Janeiro, CT Bloco A, 6° andar, Cidade Universitária, Ilha do Fundão, Rio de Janeiro, RJ, CEP 21941-590, Brazil b Agência Nacional do Petróleo, Gás Natural e Biocombustíveis - ANP, SCM, Av. Rio Branco 65, 17° andar, Centro, Rio de Janeiro, RJ, CEP 20090-004, Brazil c INEGI - Instituto de Engenharia Mecânica e Gestão Industrial, Rua Doutor Roberto Frias 378, 4200-465 Porto, Portugal |
| Abstract: | A natural Brazilian montmorillonite clay was submitted to organophilization treatments to evaluate the effect of these treatments on the flame retardancy potential of polymer composites containing an intumescent ammonium polyphosphate and pentaerythritol formulation. An ethylene-butyl acrylate copolymer was used as the polymer matrix. Natural or organophilic clays were added both to the pure polymer and to the polymer containing the intumescent mixture. The influence of these mineral fillers, and of their organophilization treatments, on flame retardancy was investigated by thermogravimetric analysis (TGA), limiting oxygen index (LOI), UL-94 rating standard, heating microscopy, rheological measurements and cone calorimetry. The results show that these inorganic additives have a synergistic effect on composites containing the intumescent formulation. |
| Keywords: | Clays Viscoelastic properties Flame retardancy Intumescence |
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