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Toughening of epoxies through thermoplastic crack bridging

dc.contributor.authorCardwell, B. J.en_US
dc.contributor.authorYee, Albert F.en_US
dc.date.accessioned2006-09-11T15:13:48Z
dc.date.available2006-09-11T15:13:48Z
dc.date.issued1998-11en_US
dc.identifier.citationCardwell, B. J.; Yee, A. F.; (1998). "Toughening of epoxies through thermoplastic crack bridging." Journal of Materials Science 33(22): 5473-5484. <http://hdl.handle.net/2027.42/44753>en_US
dc.identifier.issn0022-2461en_US
dc.identifier.issn1573-4803en_US
dc.identifier.urihttps://hdl.handle.net/2027.42/44753
dc.description.abstractThe fracture toughness and toughening mechanism of two epoxy matrices containing varying concentrations of pre-formed polyamide-12 particles was investigated. The pre-formed thermoplastic modifier was used to keep the physical and morphological characteristics of the second phase constant while varying the matrix intrinsic toughness to simplify the interpretation of toughening results. We observed that these particles toughened the epoxies through a crack bridging mechanism involving large plastic deformation of the second phase.This mechanism was found to be effective independent of the potential of the matrix for plastic deformation since the increasing fracture toughness was accomplished without significant amounts of plastic deformation in the epoxy matrix. A quantitative model was adapted to account for the increase in toughness due to the crack bridging mechanism. From this model, it was possible to determine the factors which are most important when attempting to toughen a material through thermoplastic crack bridging. A better understanding of the specific factors which influence the efficiency of the crack bridging mechanism enables the fracture properties of brittle materials to be further improved with thermoplastic addition. This was shown to be very important when attempting to enhance the toughness of materials which are believed to be “un-toughenable” by conventional rubber modification, or materials whose other mechanical properties suffer from the addition of elastomeric materials.en_US
dc.format.extent932681 bytes
dc.format.extent3115 bytes
dc.format.mimetypeapplication/pdf
dc.format.mimetypetext/plain
dc.language.isoen_US
dc.publisherKluwer Academic Publishers; Springer Science+Business Mediaen_US
dc.subject.otherChemistryen_US
dc.subject.otherMechanicsen_US
dc.subject.otherPolymer Sciencesen_US
dc.subject.otherIndustrial Chemistry/Chemical Engineeringen_US
dc.subject.otherCharacterization and Evaluation Materialsen_US
dc.titleToughening of epoxies through thermoplastic crack bridgingen_US
dc.typeArticleen_US
dc.subject.hlbsecondlevelMaterials Science and Engineeringen_US
dc.subject.hlbsecondlevelEngineering (General)en_US
dc.subject.hlbtoplevelEngineeringen_US
dc.description.peerreviewedPeer Revieweden_US
dc.contributor.affiliationumDepartment of Materials Science and Engineering, University of Michigan, Ann Arbor, MI, 48109, USAen_US
dc.contributor.affiliationumDepartment of Materials Science and Engineering, University of Michigan, Ann Arbor, MI, 48109, USAen_US
dc.contributor.affiliationumcampusAnn Arboren_US
dc.description.bitstreamurlhttp://deepblue.lib.umich.edu/bitstream/2027.42/44753/1/10853_2004_Article_202802.pdfen_US
dc.identifier.doihttp://dx.doi.org/10.1023/A:1004427123388en_US
dc.identifier.sourceJournal of Materials Scienceen_US
dc.owningcollnameInterdisciplinary and Peer-Reviewed


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