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Chemical modification of Kevlar fiber surfaces and of model diamides
Author(s) -
Wu Yulong,
Tesoro Guiliana C.
Publication year - 1986
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.1986.070310406
Subject(s) - kevlar , epoxy , nitration , fiber , composite material , materials science , amine gas treating , chemical modification , surface modification , adhesion , reagent , covalent bond , polymer chemistry , chemical engineering , chemistry , organic chemistry , engineering
Organic reactions of aromatic diamides as models for PPTA fibers have been investigated to select reagents and conditions suitable for surface‐controlled heterogeneous reactions on Kevlar filaments and fabrics. Amine functional groups have been incorporated into fiber surfaces by bromination followed by ammonolysis and by nitration followed by reduction. Modification of filaments has been attained without impairment of fiber properties. Preliminary experiments have also shown that the presence of amino groups on Kevlar fabric can provide remarkably improved peel strength and apparent interlaminar shear strength in epoxy laminates, suggesting a significant role of covalent bonding in improving adhesion in aramidepoxy composites.