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Thermophysical properties measurements of boron-modified phenolic resin used for ablative composites


R. Ferreira 1, D. Camarano1, L. Carneiro1, O. Miranda1, P. Grossi1 and L. Pardini2

1Centro de Desenvolvimento da Tecnologia Nuclear - CDTN Comissão Nacional de Energia Nuclear – CNEN, Brazil
2Instituto de Aeronáutica e Espaço - IAE Comando-Geral de Tecnologia Aeroespacial – DCTA, Brazil

Keywords: thermophysical properties, phenolic resin, ablative composites, flash laser method
property: thermal insulation
material: cured boron modified phenolic resin

In this work, measurement of termophysical properties of a boron modified phenolic resin is presented. Cylindrical samples of the cured boron modified phenolic resin were prepared for testing. The material was cured up to 180oC and final density was 1.25 g/cm3. Thermophysical properties were measured by means of the flash laser method and by the xylol penetration-immersion method. This material is used as matrix for composite materials used for ablative and heat resistant purposes. It was found that the material has a thermal diffusivity ranging from 0.14x10-6 m2×s-1 up to 0.10x10-6 m2×s-1, and a thermal conductivity ranging from 0.11 W×m-1×K-1 up to 0.10 W×m-1×K-1, in the temperature range from 29 oC up to 174 oC.

References
  1. Parker, W. J.; Jenkins, R. J.; Butler, C. P.; Abbott, G. L. Flash Method of Determining Thermal Diffusivity, Heat Capacity and Thermal Conductivity, J. Appl. Phys., 32, 1679, 1961.

  2. Taylor, R. E. Heat Pulse Thermal Diffusivity Measurement, School of Mechanical Engineering, Purdue University, West Lafayette, Indiana - PRL 154, 1978.

  3. Ferreira, R. A. N.; Miranda, O.; Dutra Neto, A.; Grossi, P. A.; Martins, G. A.; Reis, S. C.; Alencar, D. A.; Soares Filho, J. G.; Lopes C. C.; Pinho, M. G. Implantação no CDTN de laboratório de medição de propriedades termofísicas de combustíveis nucleares e materiais através do método do flash de laser. INAC 2002 - International Nuclear Atlantic Conference, Rio de Janeiro, RJ, Brasil, ABEN - Associação Brasileira de Energia Nuclear, 2002.

  4. Grossi, P. A. Metodologia para Avaliação de Incerteza na Medição de Propriedades Termofísicas pelo Método Flash Laser: Método de Monte Carlo Aplicado a Modelos Dinâmicos de Saída Multivariável”, 177p., Tese (Doutorado em Engenharia Mecânica) Escola de Engenharia da Universidade Federal de Minas Gerais, Belo Horizonte, 2008.

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