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Microencapsulated melamine phosphate via the sol–gel method and its application in halogen‐free and intumescent flame‐retarding acrylonitrile‐butadiene‐styrene copolymer
Author(s) -
Zheng Zaihang,
Yang Ting,
Wang Bingnan,
Qu Bingbing,
Wang Hongyan
Publication year - 2015
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/pi.4919
Subject(s) - intumescent , materials science , copolymer , fourier transform infrared spectroscopy , acrylonitrile butadiene styrene , fire retardant , limiting oxygen index , char , styrene , melamine , chemical engineering , polymer chemistry , polymer , pyrolysis , composite material , engineering
In this paper, a facile method is introduced to modify melamine phosphate ( MP ) via the sol–gel process. The aim was simultaneously to increase the water resistance of MP and improve the dispersion and compatibility of MP in acrylonitrile‐butadiene‐styrene copolymer ( ABS ). In addition, the incorporation of SiO 2 particles into the MP /dipentaerythritol ( DPER ) system can further ameliorate the char‐forming ability and enhance the flame retardant properties of polymer composites. The chemical structure and surface morphology of SiO 2 @ MP were confirmed and observed by Fourier transform infrared ( FTIR ) spectroscopy, SEM and TEM , respectively. The results demonstrate that ABS / SiO 2 @ MP / DPER (3/1) at a loading of 30 phr reaches 31.2% limiting oxygen index and achieves a UL ‐94 V‐0 rating. Moreover, FTIR spectra indicate that the main char‐forming process of the SiO 2 @ MP / DPER system occurs at 365–420 °C. A potential condensed flame retardant mechanism of SiO 2 @ MP and DPER in ABS composites is proposed via the systematic analysis of char residue after combustion by FTIR spectroscopy, SEM and X‐ray photoelectron spectroscopy. © 2015 Society of Chemical Industry