Study of the incorporation of iron-aluminous lateritic material in the burning rate of thermoset matrix composites

Materia

article

Bruno Henrique Alves Mendes¹  Sylvester Stallone Pontes Sales¹  Lesley Glenda Sales dos Santos¹  Edinaldo José de Sousa Cunha¹  João Nazareno Nonato Quaresma¹  José Antônio da Silva Souza¹ 

[1] Universidade Federal do Pará

关键词: Laterite;    Iron;    Aluminum;    Characterization;   

DOI  :  10.1590/S1517-707620210004.1360

学科分类：工程和技术（综合）

来源: Universidade Federal do Rio de Janeiro * Coordenacao dos Programas de Pos-Graduacao de Engenharia

【 摘 要 】

The composite materials are versatile and can be applied in different sectors depending on the required needs and their characteristics, in order to reconcile factors such as safety, environment, economy. Lateritic materials are present in a large part of the national territory and may exhibit high levels of iron and aluminum oxide and hydroxides, and may have a significant influence on the thermal properties of polymer composites. The material used in the work originated in Piriá ridge, located in the municipality of Vizeu, in the State of Pará. The work consisted of the characterization of this material and the preparation of composites using it as a filler in an isophthalic polyester matrix, which were tested through flammability tests. Analyses of laser granulometry, X-Ray fluorescence spectroscopy (XRF) and Fourier Transform Infrared (FTIR), Thermogravimetry (TG) and Differential Scanning Calorimetry (DSC) were performed. The composites were made by hand lay-up process in a closed mold, with compression of 2.7 tons for 20 minutes. The volumetric fractions used to manufacture the composites were 10, 20 and 30 % and the flammability tests were conducted according to ASTM D 635-03. As results, the material was composed of fine particles with a mean diameter of 23.5 μm, consisting of 61.13 % Fe2O3 and 18.63 % Al2O3, confirming the presence of these oxides characteristic bands at 3448 cm-1 indicate the presence of trivalent cations of Al3+ or Fe3+. The calorimetric behavior of this material presented phase transformations in a temperature range suitable for flame retardance, with significant loss of mass from approximately 270 ºC. In the composites with 30 % of lateritic material, the flame propagation was reduced by 69.86 % in relation to the polyester matrix, which makes it possible to study its application in composites.

【 授权许可】

CC BY