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Synergistic effect of supported nickel catalyst with intumescent flame‐retardants on flame retardancy and thermal stability of polypropylene
Author(s) -
Song Rongjun,
Zhang Baoyan,
Huang Baotong,
Tang Tao
Publication year - 2006
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.25178
Subject(s) - intumescent , ammonium polyphosphate , thermogravimetric analysis , materials science , char , polypropylene , thermal stability , fourier transform infrared spectroscopy , pentaerythritol , fire retardant , microstructure , chemical engineering , composite material , polymer chemistry , pyrolysis , engineering
Supported nickel catalyst (Ni‐Cat) was used as a catalyst to improve the flame retardancy of intumescent flame‐retardants (IFR) systems based on ammonium polyphosphate and pentaerythritol (PETOL) in polypropylene (PP) matrix. Limited oxygen index (LOI), UL‐94 rating, and thermogravimetric analysis were used to characterize the flame retardancy and thermal stability of the PP systems, and field emission scanning electron microscopy (FE‐SEM) and Fourier transformed infrared spectroscopy (FTIR) were used to analyze the microstructure and composition of the chars formed during measuring LOI value and after combustion at 800°C. The catalytic effect of Ni‐Cat was shown in an increase of LOI, a change in the char microstructure, and improvement of the thermal stability in the PP systems, which result from the synergistic effect of Ni‐Cat and IFR. The results from FE‐SEM and FTIR spectra of the char can explain how this synergistic effect happened. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 102: 5988–5993, 2006