Ko, YG Choi, US Ahn, DJ Kim, JS Kim, TY 2024-01-21T11:37:51Z 2024-01-21T11:37:51Z 2021-09-05 2001-11 0887-624X https://pubs.kist.re.kr/handle/201004/140068 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. (C) 2001 John Wiley & Sons, Inc. English WILEY-BLACKWELL Physicochemical and thermal studies of viscose rayon borate fiber and its carbon fiber Article 10.1002/pola.10047 1 JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY, v.39, no.22, pp.3875 - 3883 JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY 39 22 3875 3883 N scie scopus 000171853900003 2-s2.0-0035889353 Polymer Science Polymer Science Article FLAME PHOSPHATES CELLULOSE KINETICS POLYMER DEGRADATION viscose rayon borate flameproof material activation energy carbon fibers carbonization temperature flame retardance