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Halogen‐free intumescent flame retardant acrylonitrile‐butadiene‐styrene/poly(ethylene terephthalate) blends
Author(s) -
Zhao Guodong,
Pan Zhiliang,
Lu Chengxiang,
Cai Xufu
Publication year - 2010
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.32537
Subject(s) - ammonium polyphosphate , intumescent , materials science , charring , fire retardant , limiting oxygen index , thermogravimetric analysis , acrylonitrile butadiene styrene , char , nuclear chemistry , composite material , cone calorimeter , ethylene , acrylonitrile , polymer chemistry , chemical engineering , pyrolysis , polymer , organic chemistry , chemistry , copolymer , catalysis , engineering
The influence of ammonium polyphosphate (APP) with and without synergistic agents — aluminum hypophosphite (Al(H 2 PO 2 ) 3 ), epoxy resin (E‐44), and Zeolite 4A — in acrylonitrile‐butadiene‐styrene/poly(ethylene terephthalate) (ABS/PET) blends was investigated. The limiting oxygen index (LOI) and UL94 tests were used to investigate flame properties. The results showed that APP with and without synergistic agents all improved the flame retardancy of ABS/PET systems. The ABS/PET/APP + 2 wt % Al(H 2 PO 2 ) 3 , ABS/PET/APP + 2 wt % E‐44, and ABS/PET/APP + 3 wt % Zeolite 4A systems achieved the best flame retardancy rating of V0 and LOI values were 32, 34, and 30.5, respectively. The thermal degradation behaviors analyzed by thermogravimetric analysis (TGA) indicated APP mainly accelerated the degradation of PET and led to the increase of charring residues. Al(H 2 PO 2 ) 3 and E‐44 resulted in synergistic effects on the charring process of ABS/PET/APP. SEM revealed that the intact, dense, and strong char layer formed on the surface of the ABS/PET/APP/ Al(H 2 PO 2 ) 3 (or E‐44) system, which was significantly different from the loose and porous char layer of ABS/PET and ABS/PET/APP systems. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2010