Hygrothermal effects on dynamic mechanical analysis and fracture behavior of polymeric composites



Título del documento: Hygrothermal effects on dynamic mechanical analysis and fracture behavior of polymeric composites
Revista: Materials research
Base de datos: PERIÓDICA
Número de sistema: 000312877
ISSN: 1516-1439
Autores: 1

2
Instituciones: 1Instituto de Aeronautica e Espaco, Divisao de Materiais, Sao Jose dos Campos, Sao Paulo. Brasil
2Instituto Tecnologico de Aeronautica, Departamento de Engenharia Aeronautica e Mecanica, Sao Jose dos Campos, Sao Paulo. Brasil
Año:
Periodo: Jul-Sep
Volumen: 8
Número: 3
Paginación: 335-340
País: Brasil
Idioma: Inglés
Tipo de documento: Nota breve o noticia
Enfoque: Experimental
Resumen en inglés Polymer composites used above their glass transition temperatures Tg present a substantial degradation of physical properties; therefore a material's glass transition temperature and its change with moisture absorption are of practical importance. Little attention has been paid to the role of the adhesive bonding between the reinforcing fiber and matrix, particularly for BMI matrix. In this work the effect of moisture on the dynamic mechanical behavior and the fiber/matrix interface was investigated. Two systems were evaluated: carbon fabric/epoxy and carbon fabric/bismaleimide laminates. The results demonstrated that the moisture absorbed by the laminates causes either reversible or irreversible plasticization of the matrix. The humidity combined with the temperature effects may cause significant changes in the Tg matrix and toughness affecting the laminate strength. Moisture absorption was correlated to the fracture mode of the laminate demonstrating the deleterious effect of moisture on the interface. This leads to debonding between fiber and matrix. This behavior was investigated by scanning electron microscopy and dynamic mechanical analysis
Disciplinas: Ingeniería,
Física y astronomía,
Química
Palabras clave: Ingeniería de materiales,
Física de materia condensada,
Química de polímeros,
Temperatura de transición,
Vidrio,
Propiedades mecánicas,
Higrotermico
Keyword: Engineering,
Physics and astronomy,
Chemistry,
Materials engineering,
Condensed matter physics,
Polymer chemistry,
Transition temperature,
Glass,
Mechanical properties,
Hygrothermal
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