Estudo das caracteristicas de inflamabilidade de polimeros utilizados na construção civil e industria de transportes / Study of flammability characteristics of polymers used in buildings and automobile industry

AUTOR(ES)
DATA DE PUBLICAÇÃO

2008

RESUMO

The polymer materials are being used in several applications. The great number of existent monomers, as well as the possibility of copolymers synthesis, polymeric alloys formulation and the composites and nanocomposites show that it is possible to obtain materials with different specific properties and for being used in different application areas. However, besides the recognized possibility of application, the majority of polymers show inflammable character and are able to keep fire propagation with the releasing of smoke and toxic gases. Considering that the use of these materials is increasing, the study of their flammability characteristics became important for the industries and the scientific community. The aim of this work is to study the flammability properties of the following materials: unsaturated polyester resin, nanocomposite of unsaturated polyester resin and clay, rigid poly(vinyl chloride) (PVC), copolymer acrylonitrile-butadiene-styrene (ABS), alloy polycarbonate and poly(ethylene terephthalate) (PC/PBT). Vertical burning, horizontal burning, oxygen index, flash ignition point, self-ignition point, density of smoke tests and thermalgravimetric analysis were performed. The clay nanocomposite showed higher flame time, higher burning speed, higher smoke index, lower oxygen index and lower flash ignition point, when compared to neat resin; and the thermal analysis didn t show considerable differences of the thermal stability between neat resin and nanocomposite. For PVC materials, the flame retardant and/or smoke suppressant addition improved the flammability properties of PVC, especially for PVC with flame retardant and smoke suppressant addition, which showed the highest oxygen index and the lowest smoke index. Copolymer ABS and PC/PBT blends showed a behavior between resin and PVC materials for the vertical burning and selfignition point tests; for the flash ignition point, oxygen index and smoke index tests, ABS and PC/PBT showed similar behavior to neat resin and nanocomposites

ASSUNTO(S)

smoke polimeros polymers fumaça

ACESSO AO ARTIGO

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