Interface Adhesion of E-Glass Fibers in Model Polyisocyanurate Networks

Published

September 23, 1998

Author(s)

Walter G. McDonough, Gale A. Holmes, R C. Peterson

Abstract

Recent work examining the nature of the failure process of glass/epoxy specimens in the single fiber fragmentation test showed that the matrix exhibited pronounced non-linear viscoelastic behavior during the test, and that the interfacial shear strength value obtained was dependent on the rate of testing. Furthermore, it was demonstrated that the load in the sample at the end of the test was much lower than the value predicted by assuming linear-elastic behavior, and that the first fragment break occurred when the actual load in the matrix deviated from the linear-elastic prediction. To study these issues further, the testing protocol was repeated using a polyisocyanurate resin to see if a similar non-linear viscoelastic response was observed. One result from this study was that the polyisocyanurate matrix did show non-linear viscoelastic behavior similar to the epoxy matrix. Interestingly, from preliminary results, the fiber fragmentation distribution of the glass/polyisocyanurate specimens was found to be independent of the strain rate used during the test, so that the calculated interfacial shear strength appears rate independent. This result contrasted with that of the glass/epoxy specimens where the fiber fragmentation distribution, and thus, the measured interfacial shear strength, was dependent on the rate of strain.

Proceedings Title

Proceedings of the 13th annual technical conference on composite materials

Conference Dates

September 21-23, 1998

Conference Location

Baltimore , MD

Conference Title

Technical Conference on Composite Materials

Pub Type

Conferences

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Keywords

adhesion, fragmentation, glass, interface, polyisocyanurate, polymer viscoelasticity

Citation

McDonough, W. , Holmes, G. and Peterson, R. (1998), Interface Adhesion of E-Glass Fibers in Model Polyisocyanurate Networks, Proceedings of the 13th annual technical conference on composite materials, Baltimore , MD, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=851475 (Accessed April 19, 2024)