Journal
FIBERS AND POLYMERS
Volume 16, Issue 9, Pages 1836-1852Publisher
KOREAN FIBER SOC
DOI: 10.1007/s12221-015-5195-z
Keywords
Copolymer fibers; Soft body armor; 5-amino-2-(p-aminophenyl)benzimidazole; Tensile strength; Statistics
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Fibers containing 5-amino-2-(p-aminophenyl)benzimidazole are being considered for use as reinforcement in soft body armor applications. Past research in this laboratory has resulted in a suite of tests that have been used to detect degradation in other fibers and are now being applied to the fibers in question. Due to the architecture of the yarns in this study, two methods to extract single filaments for tensile testing were described and analyzed. A dry method resulted in fibers with surface damage, reflected in a high standard deviation in strength. A wet extraction method showed a reduction in surface damage and a lower standard deviation in strength. Fourier Transform Infrared analysis detected signs of hydrolysis in the fibers that were exposed to water. Although no noticeable loss in tensile strength was noted upon exposure, the possibility of hydrolysis in these fibers may indicate a need for further study.
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