Synthesis and Thermal Stability of A Novel Halogen-free Si-N Charring Agent
2-Chloro-4,6-di (3-triethoxysiloxy-1-aminoproply)-1,3,5-triazine (3) was prepared by substitution reaction of cyanuric chloride with γ-aminopropyl triethoxysilane.A novel halogen-free and high silicon content of charring agent (5) was synthesized by reaction of 3 with diethylenetriamine (4).The structure and thermal properties were characterized by 1 H NMR,FT-IR and TGA.Effects of molar ratio of raw materials,acid-blinding agent,reaction time,reaction solvent and reaction temperature on the yield of 5 were investigated.The optimum reaction conditions were as followed:toluene was solvent,triethylamine was acid-binding agent,and n (3):n (4) was 3.3:1,at 100 ℃ for 11 h,the yield was 62.7％.The initial decomposition temperature of 5 was 197 ℃,and the char yield was about 36.7％ at 700 ℃.
NETL
NSTL
万方数据
维普
