Premium
Some physical properties of various amine‐pretreated Nomex Aramid yarns
Author(s) -
Wang ChyungChyung,
Chen ChengChi
Publication year - 2005
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.21390
Subject(s) - aramid , differential scanning calorimetry , materials science , polymer chemistry , glass transition , fourier transform infrared spectroscopy , composite material , dynamic mechanical analysis , polymer , hydrolysis , chemical engineering , chemistry , organic chemistry , fiber , physics , engineering , thermodynamics
Abstract In this study we pretreated Aramid yarns with ethylenediamine (EDA), diethylene triamine (DETA), and triethylene tetraamine (TETA) under different conditions to study some of their physical properties. The tensile strength retention, dye absorption (basic dye), and wicking height changed increasing pretreatment temperature, time period, and amines concentration. The glass‐transition temperature and the density of the crystals were ranked as follows: EDA > DETA > TETA; however, the degrees of the surface void were inverse. We concluded that the polymer chains of the Aramid fibers were rearranged through shrinkage of the pretreated Aramid fibers during pretreatment, and the hydrolysis of the Nomex polymer chains occurred under higher amine concentrations. The former phenomena were confirmed with differential scanning calorimetry, dynamic mechanical analysis, and X‐ray diffraction analyses, and the latter were confirmed with Fourier transform infrared spectroscopy and basic dye adsorption analysis. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 96: 70–76, 2005