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Publication Citation: The Effect of Folding on the Internal Structure of Ballistic Fibers

NIST Authors in Bold

Author(s): Haruki Kobayashi; Walter G. McDonough; Hae-Jeong Lee; Jae Hyun Kim; Amanda L. Forster; Kirk D. Rice; Gale A. Holmes;
Title: The Effect of Folding on the Internal Structure of Ballistic Fibers
Published: May 26, 2011
Abstract: In one of our previous studies, the mechanical properties of poly (p-phenylene benzobisoxazole) (PBO) fibers were degraded when the fibers were folded. When we examined poly (p-phenylene terephthalamide) (PPTA) fibers, we did not find a similar drop in mechanical properties. In the present study, we investigated the possibility of structural changes caused by folding in PBO and PPTA fibers by using small angle X-ray scattering (SAXS). From our findings, we postulate that the fibrils in the PBO fibers were subdivided when the fibers were folded whereas the PPTA fibrils did not seem to change. The subdivision for PBO fibers may create new surfaces and defects inside the fibers. Thus, the subdivision may influence not only mechanical properties, but also hydrolytic degradation and other failure pathways.
Proceedings: SAMPE 2011
Pages: 12 pp.
Location: Long Beach, CA
Dates: May 23-26, 2011
Keywords: PBO, SAXS, PPTA, ballistic fibers
Research Areas: Polymers, Ballistics
PDF version: PDF Document Click here to retrieve PDF version of paper (403KB)