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| Synthesis of A Novel P－N－Si Halogen-free Flame Retardant and Its Application in Cotton Fiber |
| DOU Wu-hong1a,1b, LIU Dong-yue1a,1c, WANG Wen-tao1a,1b, ZHAO Bin1a,1b, LIU Ya-qing1a,1b |
| a. Research Center for Engineering Technology of Polymeric Composites of Shanxi Province; b. College of Materials Science and Engineering; c. College of Science, 1.North University of China, Taiyuan 030051, China |
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Abstract A novel ternary integrated P－N－Si halogen-free flame retardant, phenoxy-bis-(triethoxysilylpropyl)phosphamide(3), was synthesized by the reaction of phenylphosphonic dichloride(1) with (3-aminopropyl)triethoxysilane(2). The structure was characterized by 1H NMR， 31P NMR and FT-IR. Effects of solvent, reaction temperature, reaction time, acid-blinding agent and molar ratio{r［n(2) ：n(1)］} on the yield of 3 were investigated. The results showed that the optimum reaction condition at 40 ℃ for 6 h were as followed: 1 was 8 mmol, r was 2.4, THF was solvent and trithylamine was acid-blinding agent. The yield of 3 was 88.2% under the optimum reaction conditions. The flame retardant property of 3 was characterized by TGA. The results indicated that the initial decomposition temperature of 3 was 150 ℃ and the char residue is about 14.6% at 600 ℃. Cotton fabrics(c) were treated with 3. The char residue of c-315 (the mass portion of 3 was 15% in c) at 600 ℃ was 33.4%, which was better than c(7.6%).
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Received: 23 September 2015
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2016, Vol. 24 
