Carbon-epoxy composites based on fibers coated with nylon 6,6: hygrothermal ageing versus interlaminar shear strength

Duvis, T; Papaspyrides, CD

dc.contributor.author	Duvis, T	en
dc.contributor.author	Papaspyrides, CD	en
dc.date.accessioned	2014-03-01T01:09:45Z
dc.date.available	2014-03-01T01:09:45Z
dc.date.issued	1994	en
dc.identifier.issn	10427147	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/11176
dc.subject	Shear Strength	en
dc.subject.other	Absorption	en
dc.subject.other	Aging of materials	en
dc.subject.other	Carbon fibers	en
dc.subject.other	Degradation	en
dc.subject.other	Deposition	en
dc.subject.other	Epoxy resins	en
dc.subject.other	Nylon polymers	en
dc.subject.other	Polyamides	en
dc.subject.other	Strength of materials	en
dc.subject.other	Stress relaxation	en
dc.subject.other	Thermal effects	en
dc.subject.other	Water	en
dc.subject.other	Carbon epoxy composite	en
dc.subject.other	Hygrothermal aging	en
dc.subject.other	Immersion temperature	en
dc.subject.other	Interfacial polycondensation technique	en
dc.subject.other	Interlaminar shear strength	en
dc.subject.other	Polyhexamethylene adipamide	en
dc.subject.other	Short beam test	en
dc.subject.other	Water penetration	en
dc.subject.other	Composite materials	en
dc.title	Carbon-epoxy composites based on fibers coated with nylon 6,6: hygrothermal ageing versus interlaminar shear strength	en
heal.type	journalArticle	en
heal.identifier.primary	10.1002/pat.1994.220050808	en
heal.identifier.secondary	http://dx.doi.org/10.1002/pat.1994.220050808	en
heal.publicationDate	1994	en
heal.abstract	Carbon fibers were coated in situ with a thin film of polyhexamethylene adipamide by an interfacial polycondensation technique. The modified fibers were used for the preparation of epoxy-based unidirectional composites. Specimens of these materials were immersed in water until equilibrium conditions were attained. The weight gain at equilibrium was determined as a function of the immersion temperature, the fiber volume fraction and the polyamide content deposited on the fibers. Water penetration in specimens made with uncoated carbon fibers increases when the volume fraction decreases. Introduction of the polyamide interlayer initially increases the water absorption, but reduces it at higher immersion temperatures and/or higher polyamide contents. The treated specimens were subjected to the short beam test to determine the interlaminar shear strength (ILSS). The data show that the ILSS decreases with water penetration but increases when the immersion temperature increases from 40 to 70°C. The overall performance encountered is discussed in terms of the possible roles of the polyamide interphase while taking into account mechanisms concerned with matrix plasticization interphase degradation and residual stress relaxation.	en
heal.publisher	John Wiley & Sons Ltd, Chichester, United Kingdom	en
heal.journalName	Polymers for Advanced Technologies	en
dc.identifier.doi	10.1002/pat.1994.220050808	en
dc.identifier.volume	5	en
dc.identifier.issue	8	en
dc.identifier.spage	444	en
dc.identifier.epage	450	en