Effect of the amount of cork particles on the strength and glass transition temperature of a structural adhesive

• Tipo: Artigo em Revista Científica Internacional
• Data: 2014

Autores

Barbosa, AQ (Autor) Outra; da Silva, LFM (Autor) FEUP; Oechsner, A (Autor) Outra

Revista

Título: Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications

Vol. 228

Páginas: 323-333

ISSN: 1464-4207

Editora: SAGE

Indexação

ISI Web of Knowledge - 9 Citações

Scopus - 16 Citações

Outras Informações

ID Authenticus: P-009-WAX

DOI: 10.1177/1464420713493581

Abstract (EN): The inclusion of particles (micro or nano) is a method to improve the mechanical properties, such as toughness, of structural adhesives. Structural adhesives are known for their high strength and stiffness but also for their low ductility and toughness. There are many processes described in the literature to increase the toughness, the use of rubber particles being one of the most common processes. In the present study, natural micro particles of cork were used with the objective to increase the ductility of a brittle epoxy adhesive. The idea is for the cork particles to act like a crack stopper. The influence of the amount of cork particles was studied. Particles of cork ranging in size from 125 to 250 mu m were mixed in the epoxy adhesive Araldite 2020 from Huntsman. The amount of cork in the adhesive was varied between 0.5% and 5% in weight. This evaluation was made using tensile tests and it was evident that the failure strain was related to the amount of cork particles in the resin. The results concerning the single lap joints and the glass transition temperature confirm the increased ductility obtained in the tensile tests.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 11