Premium
Flame retardancy in fabric consisting of cellulosic fiber and modacrylic fiber containing fine‐grained MoO 3 particles
Author(s) -
Tanaka Takeshi,
Terakado Osamu,
Hirasawa Masahiro
Publication year - 2016
Publication title -
fire and materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.482
H-Index - 58
eISSN - 1099-1018
pISSN - 0308-0501
DOI - 10.1002/fam.2314
Subject(s) - limiting oxygen index , fire retardant , char , thermogravimetric analysis , materials science , fiber , flame test , metal hydroxide , composite material , particle size , thermal decomposition , flammability , particle (ecology) , chemical engineering , pyrolysis , metal , organic chemistry , metallurgy , chemistry , oceanography , engineering , geology
Summary Flame retardancy of fabrics consisting of modacrylic fiber containing with various dispersed metal compounds and cellulosic fiber has been investigated by means of flame test (ISO15025 procedure A) and limiting oxygen index (LOI). It has been found that excellent flame retardancy is achieved by fine‐grained MoO 3 particles. The afterflame time in flame test and the LOI value are improved with decreasing particle size of MoO 3 . The flame retardancy of MoO 3 (particle size; 0.1 µm) is comparable to that of Sb 2 O 3 . On the other hand, significant improvement in flame retardancy is not observed for other metal compounds although some metal oxides and a hydroxide in the present study are known as flame retardant or smoke suppressing agent in halogen containing polymer in previous studies. In order to clarify the mechanism of the observed flame retardancy by the addition of fine‐grained MoO 3 , we have carried out X‐ray fluorescence spectrometry (XRF) measurement of the fabric specimen after the flame test and thermogravimetric analysis (TGA) of various types of samples. These analytical data indicated that MoO 3 works as halogen synergist in solid phase and the char of modacrylic fiber formed by addition of MoO 3 suppresses decomposition of the cotton blended in the fabric in the range of the ignition temperature. Copyright © 2015 John Wiley & Sons, Ltd.