Flame retardancy in fabric consisting of cellulosic fiber and modacrylic fiber containing fine‐grained MoO₃ particles

Abstract

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 MoO3 particles. The afterflame time in flame test and the LOI value are improved with decreasing particle size of MoO3. The flame retardancy of MoO3 (particle size; 0.1 µm) is comparable to that of Sb2O3. 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 MoO3, 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 MoO3 works as halogen synergist in solid phase and the char of modacrylic fiber formed by addition of MoO3 suppresses decomposition of the cotton blended in the fabric in the range of the ignition temperature. Copyright © 2015 John Wiley & Sons, Ltd.

Flame-Retardant Mechanism and Mechanical Properties of Wet-Spun Poly(acrylonitrile-co-vinylidene chloride) Fibers with Antimony Trioxide and Zinc Hydroxystannate

“…The second stage appears to be caused by the decomposition of the char layer produced by the subsequent reaction after dehydrochlorination [ 10 ]. The TMR2 of PANVDC-ZHS was 640 °C, the highest among the fibers.…”

“…Tanaka et al used ZHS for PANVDC fiber and reported that the LOI value was 29.2%. However, this result was that of blended fabric consisting 60 wt.% of PANVDC and 40 wt.% of cotton fiber [ 10 ]. Song et al also applied ZHS to PANVDC, but they focused on improving compatibility of ZHS in PANVDC [ 11 ].…”

Functionalizing MXenes with molybdenum trioxide towards reducing fire hazards of thermoplastic polyurethane

“…28 Though Ti 3 C 2 T x and MoO 3 have been confirmed as effective fillers in enhancing the flame retardancy of polymeric materials, the application of the Ti 3 C 2 T x -MoO 3 hybrid in flame-retardant TPU nanocomposites has not been exploited. [29][30][31] The combination of the excellent toxic fume suppression of MoO 3 and the remarkable barrier and catalysis effects of Ti 3 C 2 T x is anticipated to bring stupendous benefits for the fire safety of polymeric materials. In this work, a Ti 3 C 2 T x -MoO 3 hybrid was synthesized via the electrostatic interaction method and introduced into the TPU matrix to prepare TPU/Ti 3 C 2 T x -MoO 3 nanocomposites.…”

Fabrication of hollow carbon spheres modified by molybdenum compounds towards toxicity reduction and flame retardancy of thermoplastic polyurethane

“…Meanwhile, through literature review found that molybdenum compounds were often used as a smoke suppressant and flame retardant in previous papers. [17][18][19][20][21][22][23][24][25][26] Considering that the HCS is a material with good thermal stability, 15 it can be used as the carrier of molybdenum compounds. Moreover, the combination of molybdenum compounds and HCS for flame retardancy and smoke suppression of TPU materials is relatively limited.…”