Carolina Mattedi Có
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
Research Subjects
Carolina Mattedi Có has a total of 2 co-authors. Here are the top co-authors by number of shared publications:
- Guilherme Chagas Cordeiro
Universidade Estadual do Norte Fluminense Darcy Ribeiro
1 shared publication - Janine Domingos Vieira
Assistant Professor, Department of Civil Engineering, Universidade Federal Fluminense, Rio de Janeiro, Brazil
1 shared publication
Latest Publications
- Open Access
- 1 March 2016
- Published by FapUNIFESP (SciELO) in Matéria (Rio de Janeiro)
- Vol. 21 (1) , 1-10
Tensile properties and color and mass variations of GFPR composites under alkaline and ultraviolet exposures
The objective of the present study was to evaluate the influence of two different environmental conditions on the quantitative change of color and mass, tensile strength and modulus of elasticity of glass fiber reinforced polymers (GFRP) produced in Brazil. For this purpose, specimens were taken from pultruded composite profiles with two different matrices (vinylester and phenolic resins) reinforced with glass fibers. The first condition consisted of exposing them to cycles of ultraviolet radiation followed by water spray. In the second environment, the specimens were continuously exposed to alkaline solution at a constant temperature of 40 °C. After the exposure, both vinylester and phenolic composites were characterized according to the following parameters: variation of mass, tensile strength and modulus of elasticity. The CIE 1976L*a*b* color system was used to determinate the color variation of the specimens after degradation using a spectrophotometer. Results indicated significant reductions in tensile strength values for both composites, in addition to expressive variations of mass and color. However, the color variation was not directly related with the loss of mechanical strength.
- 1 March 2016
- Published by FapUNIFESP (SciELO) in Matéria (Rio de Janeiro)
- Vol. 21 (1) , 1-10
Open AccessTensile properties and color and mass variations of GFPR composites under alkaline and ultraviolet exposures
The objective of the present study was to evaluate the influence of two different environmental conditions on the quantitative change of color and mass, tensile strength and modulus of elasticity of glass fiber reinforced polymers (GFRP) produced in Brazil. For this purpose, specimens were taken from pultruded composite profiles with two different matrices (vinylester and phenolic resins) reinforced with glass fibers. The first condition consisted of exposing them to cycles of ultraviolet radiation followed by water spray. In the second environment, the specimens were continuously exposed to alkaline solution at a constant temperature of 40 °C. After the exposure, both vinylester and phenolic composites were characterized according to the following parameters: variation of mass, tensile strength and modulus of elasticity. The CIE 1976L*a*b* color system was used to determinate the color variation of the specimens after degradation using a spectrophotometer. Results indicated significant reductions in tensile strength values for both composites, in addition to expressive variations of mass and color. However, the color variation was not directly related with the loss of mechanical strength.