Thermoplastic prepreg manufacture by solution impregnation

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dc.contributor.authorGoodman, Kendall E.en
dc.contributor.committeechairLoos, Alfred C.en
dc.contributor.committeememberReifsnider, Kenneth L.en
dc.contributor.committeememberBaird, Donald G.en
dc.contributor.committeememberDavis, Richey M.en
dc.contributor.departmentEngineering Mechanicsen
dc.date.accessioned2014-03-14T21:34:21Zen
dc.date.adate2009-04-25en
dc.date.available2014-03-14T21:34:21Zen
dc.date.issued1990-03-15en
dc.date.rdate2009-04-25en
dc.date.sdate2009-04-25en
dc.description.abstractAdvanced thermoplastic composites are commonly manufactured from "'prepreg" materials, where the reinforcing fibers are preimpregnated with resin. The objectives of this investigation were to identify the critical parameters in impregnation of the fiber tow by a thermoplastic solution, and to produce high quality thermoplastic prepreg. Continuous carbon fibers (AS4 and AU4) were impregnated with a thermoplastic resin solution using a research scale, single tow, drum winding prepreg machine. The parameters varied to control the degree of impregnation of the fiber tow were, weight percent polymer in solution, die size, fiber tow tension, fiber tow velocity, and the use of impregnation pins. These parameters were varied during the prepregging operation and prepreg samples were evaluated to determine resin content. Viscosity studies were performed on the polymer solutions by means of a Rheometrics Mechanical Spectrometer. Thermogravimetric analyses were performed on the thermoplastic solution and the prepreg. Cross-sectional photomicrographs were obtained to determine the degree of impregnation and the fiber/resin distribution. Unidirectional laminates were fabricated from the prepreg. Transverse tensile and double cantilivered beam mechanical tests were performed. Fractography photomicrographs were taken. X-Ray photoelectron spectroscopy was used to investigate the possibility of residual solvent in the laminates. High quality prepreg was manufactured and the critical parameters in the prepregging process were identified and their effect on the prepreg was quantified.en
dc.description.degreeMaster of Scienceen
dc.format.extentix, 102 leavesen
dc.format.mediumBTDen
dc.format.mimetypeapplication/pdfen
dc.identifier.otheretd-04252009-040400en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-04252009-040400/en
dc.identifier.urihttp://hdl.handle.net/10919/42197en
dc.language.isoenen
dc.publisherVirginia Techen
dc.relation.haspartLD5655.V855_1990.G663.pdfen
dc.relation.isformatofOCLC# 21768548en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.lccLD5655.V855 1990.G663en
dc.subject.lcshThermoplasticsen
dc.titleThermoplastic prepreg manufacture by solution impregnationen
dc.typeThesisen
dc.type.dcmitypeTexten
thesis.degree.disciplineEngineering Mechanicsen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

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