Study of the thermal behavior of carbon/epoxy laminates exposed to multiple thermal cycles

Study of the thermal behavior of carbon/epoxy laminates exposed to multiple thermal cycles

Title: Study of the thermal behavior of carbon/epoxy laminates exposed to multiple thermal cycles;
Estudo do comportamento térmico de laminados carbono/epóxi submetidos a múltiplos ciclos térmicos
Author Reis de Souza, Christiane Sales Google Scholar
Fernandes Marlet, Jose Maria Google Scholar
Cardoso, Andreza de Moura Google Scholar
Rezende, Mirabel Cerqueira Autor UNIFESP Google Scholar
Abstract In this study, the thermal behavior of three families of carbon fiber/epoxy resin laminates, exposed to multiple thermal cycles, were evaluated. Thermogravimetric (TGA) and dynamic mechanical (DMA) analyses were used. This paper aims to consider the use of carbon fiber/epoxy prepreg scraps - a noble material in the aircraft industry, by comparing the thermal behavior of one laminate manufactured with prepreg scraps (laminate R), a laminate manufactured with commercial prepreg (Laminate A) and a third one produced with wet hand lay-up materials (Laminate B). The cured laminates were exposed to multiple thermal cycles: 40, 100 and 300 h of exposure at the maximum temperature of 180 degrees C. TGA results show that laminates exposed to the multiple thermal cycles present thermal stability at 180 degrees C, with relative mass loss due to humidity absorbed by the laminates. DMA curves show that the multiple thermal cycling has almost no effect on the thermal behavior and even raises the glass transition temperatures of the epoxy resin systems studied. With these results, it can be affirmed that the laminates submitted to multiple thermal cycling have thermal stability enough to be used on composite curing jigs.
Keywords Epoxy Resin
Carbon/Epoxy Composites
Thermal Cycling
Tga
DmaFiber
Composites
Language Portuguese
Date 2016
Published in Polimeros-Ciencia E Tecnologia. Sao carlos, v. 26, n. SI, p. 8-15, 2016.
ISSN 0104-1428 (Sherpa/Romeo, impact factor)
Publisher Assoc brasil polimeros
Extent 8-15
Origin http://dx.doi.org/10.1590/0104-1428.1769
Access rights Open access Open Access
Type Article
Web of Science ID WOS:000371079100003
SciELO ID S0104-14282016000700003 (statistics in SciELO)
URI http://repositorio.unifesp.br/handle/11600/49597

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