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Environmental effects on poly‐ p ‐phenylenebenzobisoxazole fibers. II. Attempts at stabilization
Author(s) -
Walsh Peter J.,
Hu Xianbo,
Cunniff Philip,
Lesser Alan J.
Publication year - 2006
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.24794
Subject(s) - materials science , carbon black , phosphoric acid , supercritical carbon dioxide , graphite , titanium dioxide , fiber , chemical engineering , supercritical fluid , degradation (telecommunications) , composite material , microstructure , carbon dioxide , chemistry , organic chemistry , metallurgy , engineering , telecommunications , natural rubber , computer science
Approaches to alleviate the environmental degradation of as‐spun poly‐ p ‐phenylenebenzobisoxazole (PBO AS) fibers by moisture, acidic conditions, and UV–visible radiation were implemented and tested for efficacy. The general approaches tested include: extraction and neutralization of residual phosphoric acid using supercritical carbon dioxide; the use of UV–visible light blocking coatings of exfoliated graphite, carbon black, and glassy titanium dioxide; and improvement of initial fiber properties by the application of forces tending to compact the fiber microstructure. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 102: 3819–3829, 2006