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Effects of Organic Sulfur and Phosphor Compounds Used as Antioxidants on the Thermal Behavior of Nitrocellulose and its Decomposition Mechanism
Author(s) -
Katoh Katsumi,
Yoshino Satoru,
Kubota Shiro,
Wada Yuji,
Ogata Yuji,
Nakahama Masaru,
Kawaguchi Shuhei,
Arai Mitsuru
Publication year - 2007
Publication title -
propellants, explosives, pyrotechnics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.56
H-Index - 65
eISSN - 1521-4087
pISSN - 0721-3115
DOI - 10.1002/prep.200700044
Subject(s) - undecane , chemistry , sulfuric acid , phosphoric acid , autoxidation , nitrocellulose , decomposition , antioxidant , isothermal process , thermal decomposition , degradation (telecommunications) , phosphor , nuclear chemistry , organic chemistry , medicinal chemistry , polymer chemistry , materials science , biochemistry , telecommunications , physics , optoelectronics , membrane , computer science , thermodynamics
The effects of 3‐dodecylsulfanyl‐propionic acid 3‐(3‐dodecylsulfanyl‐propionyloxy)‐2,2‐bis‐(3‐dodecylsulfanyl‐propionyl‐oxymethyl)‐propyl ester (SO), 3,9‐bis‐octadecyloxy‐2,4,8,10‐tetraoxa‐3,9‐diphospha‐spiro[5,5]undecane (POf), and 3,9‐bis‐(2,6‐di‐tert‐butyl‐4‐methyl‐phenoxy)‐2,4,8,10‐tetraoxa‐3,9‐diphospha‐spiro[5,5]undecane (POp), which are used as antioxidants for polymers, on the degradation of nitrocellulose (NC) were investigated under isothermal storage conditions at 393 K with a microcalorimeter. The result indicated that SO/NC and POf/NC accelerated the heat release when compared with NC without an antioxidant, whereas the heat release behavior of NC/POp was similar to that of NC without an antioxidant. In the case of SO/NC and POf/NC, the heat release was observed in the presence of O 2 , whereas it was not observed in a N 2 atmosphere. The SO $\rm{ {_{4}^{2-}}}$ content in SO/NC and PO $\rm{ {_{4}^{3-}}}$ content in POf/NC increased with the storage time. According to this behavior, it can be explained that sulfuric acid or phosphoric acid, which originates from SO or POf, accelerates the autoxidation of NC.