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Pyrolysis and limiting oxygen indices of cotton fabrics graft copolymerized with oligomeric vinyl phosphonate and/or N ‐methylolacrylamide
Author(s) -
Masuko Fumi,
Mitani Chizu,
Sakamoto Munenori
Publication year - 2002
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.798
Subject(s) - limiting oxygen index , monomer , acrolein , cellulose , chemistry , copolymer , pyrolysis , polymer chemistry , phosphonate , oxygen , limiting , nuclear chemistry , organic chemistry , char , catalysis , mechanical engineering , engineering , polymer
Graft copolymerization of an oligomeric vinyl phosphonate (FYR) and/or N ‐methylolacrylamide was made onto cotton fabrics by a pad‐dry‐steam method. The limiting oxygen indices (LOI) of the treated samples confirmed the P–N synergism. Simultaneous TG/DTA measurements indicated that an exothermic peak appeared at a temperature near that where the main decomposition ended for the samples of high LOI (>24) values, either prepared with FYR or with both monomers. The peak temperature, however, did not correlate directly with the LOI of the sample. Curie‐point pyrolysis at 590°C was extensively studied on the treated samples by GC and GC–MS. Most of the main degradation products of the untreated cotton included hydroxyacetaldehyde, 1‐hydroxypropan‐2‐one, ethyl methyl ketone and acrolein. The amounts (per unit weight of the cellulose fraction of the samples) of these carbonyl compounds were much reduced by the introduction of a small amount of phosphorus into cotton. The decrease in the amount (per unit weight of the treated sample) of acrolein correlated highly with the increase in LOI. Copyright © 2002 John Wiley & Sons, Ltd.