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- Title
Inorganic-organic hybrid coating-encapsulated ammonium polyphosphate and its flame retardancy and water resistance in epoxy resin.
- Authors
Qu, Hongqiang; Wu, Weihong; Hao, Jianwei; Wang, Chunzheng; Xu, Jianzhong
- Abstract
SUMMARY A novel encapsulated ammonium polyphosphate (APP) with an inorganic-organic hybrid coating (MAPP) was prepared by a sol-gel method using tetraethoxysilane and octyltriethoxysilane as precursors. The properties of MAPP were investigated by water solubility, hydrophobicity, and morphological determination. The structure of MAPP was characterized by X-ray photoelectron spectroscopy. The flame retardancy of epoxy resin composite with MAPP was evaluated by limiting oxygen index, UL-94 test, and cone calorimetry test. The results showed that both tetraethoxysilane and octyltriethoxysilane hydrolyze and condense to form a dense polysiloxane layer structure on the surface of APP. The water solubility of MAPP was reduced from 0.64 to 0.13 g/100 mL of water, and the water resistance of epoxy resin composites filled with MAPP was also greatly improved. The limiting oxygen index, UL-94 test, and cone calorimeter results showed that the epoxy resin composites filled with MAPP had better flame retardancy, probably because of a synergistic effect between polysiloxane and APP. Copyright © 2013 John Wiley & Sons, Ltd.
- Subjects
FIREPROOFING agents; EPOXY resins; SILOXANES; X-ray photoelectron spectroscopy; SOLUBILITY
- Publication
Fire & Materials, 2014, Vol 38, Issue 3, p312
- ISSN
0308-0501
- Publication type
Article
- DOI
10.1002/fam.2182