Aged and unaged PBIA-based copolymer testing for soft body armor applications

Metadata Updated: December 6, 2019

Traditionally, soft body armor has been made from materials such as poly(p-phenylene terephthalamide) (PPTA) and ultra-high molar mass polyethylene (UHMMPE). However, to diversify the fiber choices in the United States body armor market, copolymer fibers based on the combination of 5-amino-2-(p-aminophenyl) benzimidazole (PBIA) and PPTA were introduced. Little is known regarding the long-term stability of PBIA fibers, but as condensation polymers, they have potential sensitivity to moisture and humidity. Ballistic resistance and other critical structural properties of these fibers are predicated on their superior mechanical properties. Therefore, it is important to characterize the strength of these materials and understand their vulnerability to environmental conditions to evaluate their use lifetime in safety applications. Three PBIA-based fibers were selected for the study. The fibers were thoroughly washed to remove an organic coating, which held the individual fibers in each yarn bundle together, allowing for the disentangling of single fibers for mechanical testing. Molecular spectroscopy and single fiber tensile testing were performed on the fibers to characterize changes in their chemical structure, tensile strength, and strain to failure as a function of exposure time to four different hydrothermal ageing conditions.

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Metadata Created Date October 18, 2019
Metadata Updated Date December 6, 2019

Metadata Source

Harvested from Commerce Non Spatial Data.json Harvest Source

Additional Metadata

Resource Type Dataset
Metadata Created Date October 18, 2019
Metadata Updated Date December 6, 2019
Publisher National Institute of Standards and Technology
Unique Identifier ark:/88434/mds2-2123
Amy Engelbrecht-Wiggans
Maintainer Email
Public Access Level public
Bureau Code 006:55
Metadata Context
Schema Version
Catalog Describedby
Harvest Object Id 70136cb4-9cf5-4402-9ed8-9ac1f2191140
Harvest Source Id 0836a94a-b3c8-4190-a145-bddc06458b2c
Harvest Source Title Commerce Non Spatial Data.json Harvest Source
Data First Published 2019-10-07
Homepage URL
Language en
Data Last Modified 2019-09-09 00:00:00
Program Code 006:045
Related Documents
Source Datajson Identifier True
Source Hash 36d2fb7571af646fd9f777cc912ced6f54289f22
Source Schema Version 1.1
Category Materials:Materials characterization

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