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Preparation of microencapsulated ammonium polyphosphate with montmorillonite‐melamine formaldehyde resin and its flame retardancy in EVM
Author(s) -
Zhang Yingjun,
Lu Yanbing,
Guo Fei,
Peng Chang,
Li Mingming,
Xu Weijian
Publication year - 2012
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.1846
Subject(s) - ammonium polyphosphate , materials science , thermogravimetric analysis , melamine , montmorillonite , chemical engineering , thermal stability , fourier transform infrared spectroscopy , nuclear chemistry , vinyl acetate , fire retardant , polymerization , in situ polymerization , urea formaldehyde , absorption of water , melamine resin , polymer chemistry , copolymer , coating , composite material , layer (electronics) , chemistry , polymer , adhesive , engineering
Microencapsulated ammonium polyphosphate (MMT‐MF‐APP) with a montmorillonite‐melamine formaldehyde resin coating layer was successfully prepared by in situ polymerization. The product was characterized by Fourier‐transform infrared, X‐ray photoelectron spectroscopy, and scanning electron microscopy. Water absorption analysis showed that the microencapsulation of APP with the MMT‐MF resin leads to a decrease in the particle's water solubility. The microcapsules also exhibited better mechanical properties and higher flame retardancy in the ethylene–vinyl acetate copolymer with high vinyl acetate content (EVM) rubber compared with the common ammonium polyphosphate. Moreover, thermogravimetric analysis results showed that the EVM composites with MMT‐MF‐APP and dipentaerythritol (DPER) as flame retardants possess higher thermal stability than those with common APP and DPER as flame retardants. Copyright © 2011 John Wiley & Sons, Ltd.