Notched impact behavior of polymer blends: Part 1: New model for particle size dependence

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dc.contributor.authorBucknall, C. B.
dc.contributor.authorPaul, D. R.
dc.date.accessioned2010-01-09T11:30:51Z
dc.date.available2010-01-09T11:30:51Z
dc.date.issued2009-11-03
dc.description.abstractA model is proposed to explain the observed relationships between particle size and fracture resistance in high-performance blends, which typically reach maximum toughness at particle diameters of 0.2–0.4 μm. To date there has been no satisfactory explanation for the ductile–brittle (DB) transition at large particle sizes. The model is based on a recently developed criterion for craze initiation, which treats large cavitated rubber particles as craze-initiating Griffith flaws. Using this criterion in conjunction with Westergaard's equations, it is possible to map the spread from the notch tip of three deformation mechanisms: rubber particle cavitation, multiple crazing and shear yielding. Comparison of zone sizes leads to the conclusion that maximum toughness is achieved when the particles are large enough to cavitate a long way ahead of a notch or crack tip, but not so large that they initiate unstable crazes and thus reduce fracture resistance.en_UK
dc.identifier.citationC.B. Bucknall, D.R. Paul, Notched impact behavior of polymer blends: Part 1: New model for particle size dependence, Polymer, Volume 50, Issue 23, 3 November 2009, Pages 5539-5548en_UK
dc.identifier.issn0032-3861
dc.identifier.urihttp://dx.doi.org/10.1016/j.polymer.2009.09.059
dc.identifier.urihttp://hdl.handle.net/1826/4118
dc.language.isoenen_UK
dc.publisherElsevieren_UK
dc.subjectImpact modified polymersen_UK
dc.subjectTougheningen_UK
dc.subjectStructure/property relationshipen_UK
dc.titleNotched impact behavior of polymer blends: Part 1: New model for particle size dependenceen_UK
dc.typeArticleen_UK

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