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Toughening epoxy resins with solid acrylonitrile-butadiene rubber

✍ Scribed by Frounchi, Masoud; Mehrabzadeh, Mahmood; Parvary, Matin

Publisher
John Wiley and Sons
Year
2000
Tongue
English
Weight
324 KB
Volume
49
Category
Article
ISSN
0959-8103

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✦ Synopsis

The feasibility of using solid acrylonitrile±butadiene rubbers (NBR) with 19 and 33% w/w acrylonitrile to toughen diglycidyl ether of bisphenol A (DGEBA) epoxy resins has been investigated. Thermal analysis experiments revealed a two-phase morphology of these rubber-modi®ed epoxies. However, the higher content of acrylonitrile in the rubber caused better compatibility between NBR and the epoxy resin. The rubber with 33% acrylonitrile was found to be an effective toughening agent for DGEBA epoxy resins. Fracture surface studies and also the high tensile strength of crosslinked high molecular weight NBR suggest that the toughening effect should arise from rubber bridging and tearing mechanisms.

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