Physicochemical and thermal studies of viscose rayon borate fiber and its carbon fiber.
- Physicochemical and thermal studies of viscose rayon borate fiber and its carbon fiber.
- 고영건; 최웅수; 안동준; 김정수; 김태영
- viscose rayon; borate; flameproof material; activation energy; carbon fibers; carbonization temperature; flame retardance
- Issue Date
- Journal of polymer science Part A, Polymer chemistry
- VOL 39, NO 22, 3875-3883
- Nonhalogen compounds have been studied for improvements in the flameproofing
property and toxicity of flame retardants. Borate compounds have properties
of multifunctional smoke suppressants, flame retardants, and afterglow suppressants.
In this study, borate was coupled onto the surface of viscose rayon felt. Coupling and
carbonization were confirmed by attenuated total reflectance Fourier transform infrared
(ATR FTIR). The initial carbonization temperature was certified with ATR FTIR,
elemental analysis of carbon, and thermogravimetric analysis. In the carbonization
step, all chemical groups of the surface of the viscose rayon felt degraded to the various
gases. Moreover, the weight percentage of the carbon element increased with increasing
carbonization temperature. Initial rapid thermal degradation temperatures of viscose
rayon prepared at various temperatures increased with the increasing reaction temperature.
The activation energy was calculated with the Freeman and Carroll method.
The activation energy of borate-coupled viscose rayon decreased much more than before
coupling. However, the activation energy increased with the increasing carbonization
temperature in the carbonization step. Viscose rayon borates showed higher limiting
oxygen index (LOI) values and volumetric resistance rate values than viscose rayon
phosphates. In this article, the relationship between the activation energy and LOI is
studied. The synthesized viscose rayon borate is found to be highly effective as a flame
retardant and electrically resistant.©2001 John Wiley&Sons, Inc. J PolymSci Part A: Polym
Chem 39: 3875–3883, 2001
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