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Microencapsulated ammonium polyphosphate with polyurethane shell: preparation, characterization, and its flame retardance in polyurethane
Author(s) -
Ni Jianxiong,
Tai Qilong,
Lu Hongdian,
Hu Yuan,
Song Lei
Publication year - 2010
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.1441
Subject(s) - ammonium polyphosphate , polyurethane , materials science , thermogravimetric analysis , fourier transform infrared spectroscopy , thermal stability , polyethylene glycol , chemical engineering , x ray photoelectron spectroscopy , nuclear chemistry , scanning electron microscope , differential scanning calorimetry , polymer chemistry , fire retardant , composite material , chemistry , engineering , thermodynamics , physics
A series of polyurethane (PU) microencapsulated ammonium polyphosphate (MCAPP) were prepared by in situ polymerization from toluene‐2,4‐diisocyanate (TDI), polyethylene glycol (PEG), and pentaerythtritol (PER). And the structure was characterized by Fourier transform infrared spectroscopy (FTIR) and X‐ray photoelectron spectroscopy (XPS). Then it chose the optimal PEG constituent to design microcapsule from scanning electron microscopy (SEM) and water solubility test. The combustion and thermal degradation behaviors of PU blended APP or MCAPP were investigated by thermogravimetric analysis (TGA), UL‐94 test, and microcombustion calorimetry. The results showed that the PU/MCAPP had better thermal stability and flame retardance, due to the stable char forming by APP and PU shell. Moreover, the water resistance of flame retarded PU composite was greatly improved. Copyright © 2009 John Wiley & Sons, Ltd.