Significant Enhancement in Compressive Strength of Poly(p-phenylenebenzobisoxazole) Fibers by Incorporation of Carbon Nanofibers
- Authors
- Park, Ji Hyun; Kim, Sung Hea; Lee, Sang Cheol; Yoon, Kwan Han; Min, Byung Gil
- Issue Date
- Aug-2016
- Publisher
- KOREAN FIBER SOC
- Keywords
- Poly(p-phenylenebenzobisoxazole) (PBO); Carbon nanofiber; Composite fiber; Compressive strength
- Citation
- FIBERS AND POLYMERS, v.17, no.8, pp.1317 - 1321
- Journal Title
- FIBERS AND POLYMERS
- Volume
- 17
- Number
- 8
- Start Page
- 1317
- End Page
- 1321
- URI
- https://scholarworks.bwise.kr/kumoh/handle/2020.sw.kumoh/19149
- DOI
- 10.1007/s12221-016-6458-z
- ISSN
- 1229-9197
- Abstract
- Poly(p-phenylenebenzobisoxazole) (PBO) composite fibers containing small amounts (similar to 2 wt.%) of carbon nanofibers (CNFs) were successfully prepared by in-situ polymerization and dry-jet wet spinning. Polarized optical microscopy images displayed a lyotropic liquid-crystalline phase in the as-polymerized dopes. Solution viscosity measurements revealed that the molecular weights of the composite fibers were in the range from 1.81x10(4) gmol(-1) to 2.2x10(4) gmol(-1). Field emission scanning electron microscopy images of the composite fibers etched by UV irradiation showed that CNFs embedded in the PBO matrix were individually dispersed, and well oriented along the fiber direction. Tensile tests indicated that the tensile moduli of the PBO/CNF composite fibers were higher than those of the pristine PBO fibers, whereas the tensile strengths were lower or similar to those of the pristine PBO fibers. The elastic loop test was carried out to measure the compressive strength of the fibers. The compressive strength of the pristine PBO fiber was 0.3 GPa, whereas that of a PBO composite fiber containing 1.0 wt.% CNF increased to 0.92 GPa, which is about twice the compressive strength of Zylon (0.43 GPa). Moreover, a heat-treated PBO composite fiber containing 2.0 wt.% CNFs exhibited the high compressive strength of 1.17 GPa, which is the second highest value among all reported values for organic polymers.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - School of Science and Engineering of chemical Materials > 1. Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.