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Investigation of the action of flame retardants in cellulose. I. Investigation of the flame retardant action of 2,2′‐oxybis(5,5‐dimethyl‐1,3,2‐dioxaphosphorinane‐2,2′‐disulfide) in cellulose
Author(s) -
Choudhary Marjeet S.,
Fink Johannes K.,
Lederer Klaus
Publication year - 1985
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1985.070301113
Subject(s) - fire retardant , cellulose , pyrolysis , limiting oxygen index , chemistry , organic chemistry , dimethyl disulfide , infrared spectroscopy , polymer chemistry , chemical engineering , sulfur , char , engineering
Pyrolysis experiments were performed in high vacuum and under reduced air pressure (100 Pa). The volatile products of pure cellulose and cellulose containing various amounts of flame retardant 2,2′‐oxybis (5,5‐dimethyl‐1,3,2‐dioxaphosphorinane‐2,2′‐disulfide), i.e., Sandoflam 5060 of Sandoz AG, were studied by means of gas chromatography in combination with mass spectroscopy. The volatile products were characterized with infrared spectroscopy. The studied revealed that the incorporation of the flame retardant enhanced the water release and shifted the onset of this reaction to lower temperature. On the basis of these findings an explanation for the mechanism of flame retardancy in generated cellulose fibers modified with this particular flame retardant is attempted. From experiments with different residual air pressure the influence of oxygen on the primary processes of the pyrolytic degradation of cellulose is being discussed.