Modelling of the toughening mechanisms in rubber-modified epoxy polymers
- 481 Downloads
A mathematical model has been developed to quantify the relationships between the microstructure and fracture properties of multiphase rubber-toughened epoxy polymers. Good agreement between predictions from the model and experimental results have been found. The model also reveals that localized plastic shear banding in the epoxy matrix, running between the rubbery particles, is the dominating mechanism under all testing conditions. Plastic void growth in the epoxy matrix is the other main toughening mechanism. This latter mechanism is initiated by internal cavitation of the rubbery particle, or by debonding at the particle-matrix interface, and is particularly significant at higher test temperatures.
KeywordsEpoxy Cavitation Fracture Property Shear Banding Epoxy Matrix
Unable to display preview. Download preview PDF.
- 3.A. F. Yee, in “Polymer blends: conference proceedings” (Plastics and Rubber Institute, London, 1990) p. EK1/1.Google Scholar
- 8.Idem., J. Mater. Sci. Lett., in press.Google Scholar
- 9.A. J. Kinloch and R. J. Young, “Fracture behaviour of polymers” (Applied Science Publishers Ltd, London, 1983).Google Scholar
- 10.P. B. Bowden, in “The physics of glassy polymers”, edited by R. N. Haward (Applied Science Publishers Ltd, London, 1975).Google Scholar
- 12.J. W. Smith, “Deformation induced failure mechanisms in particulate filled epoxy resins”, PhD thesis, Ecole Polytechnique Federate de Lausanne (1989).Google Scholar
- 16.J. F. Knott, “Fundamentals of fracture mechanics” (Butterworths, London, 1979).Google Scholar
- 18.A. J. Kinloch, C. A. Finch and S. Hashemi, Polymer Commun. 28 (1987) 229.Google Scholar
- 19.Y. Huang, “Microstructure-property relationships in toughened epoxy polymers”, PhD thesis, University of London (1991).Google Scholar