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dc.contributor.advisorLacy, Thomas E.
dc.contributor.advisorToghiani, Hossein
dc.contributor.authorTorres, Glenn William
dc.date.accessioned2021-03-02T14:54:17Z
dc.date.available2021-03-02T14:54:17Z
dc.identifier.urihttps://hdl.handle.net/11668/21284
dc.description.abstractA design of experiments methodology was used to investigate the effect of vaporgrown carbon nanofiber (VGCNF) weight fraction, high-shear mixing time, and ultrasonication time on the Izod impact strength of vinyl ester (VE) based nanocomposites. A response surface model (RSM) was developed for predicting impact strengths using a regression analysis approach. The RSM predicts a maximum increase in impact strength of 18% at a VGCNF weight fraction of 0.17 parts per hundred parts resin (phr) (a volume percent of ~0.1) and 100 min high-shear mixing when compared to that of neat VE. The impact strength predictions show an initial increase for low VGCNF weight fractions and extended high-shear mixing. However, a marked decrease in impact strength occurred as the VGCNF weight fraction increased above 0.45 phr. Scanning electron micrographs of the fracture surface of several specimens suggest that the impact strength of VGCNF/VE nanocomposites is directly related to nanofiber dispersion.en_US
dc.subjectpolymer-matrix compositesen_US
dc.subjectmechanical propertiesen_US
dc.subjectstatistical properties/methodsen_US
dc.subjectmechanical testingen_US
dc.titleTHE EFFECT OF MATERIAL AND PROCESSING ON THE IMPACT STRENGTH OF VAPOR-GROWN CARBON NANOFIBER/VINYL ESTER COMPOSITESen_US
dc.typeGraduate Thesisen_US
dc.publisher.departmentAerospace Engineeringen_US
dc.publisher.collegeBagley College of Engineeringen_US
dc.subject.degreeMaster of Scienceen_US
dc.subject.majorAerospace Engineeringen_US
dc.contributor.committeePittman, Charles U., Jr.
dc.contributor.committeeDuBien, Janice
dc.contributor.committeeSullivan, Rani W.
dc.date.defense2011-10-24
dc.date.graduation2011


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