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Phosphorus‐containing epoxy for flame retardant. III: Using phosphorylated diamines as curing agents
Author(s) -
Liu YingLing,
Hsiue GingHo,
Lee RongHo,
Chiu YieShun
Publication year - 1997
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/(sici)1097-4628(19970214)63:7<895::aid-app9>3.0.co;2-l
Subject(s) - epoxy , phosphine oxide , fire retardant , diamine , curing (chemistry) , limiting oxygen index , char , oxide , materials science , polymer chemistry , phosphine , chemistry , organic chemistry , composite material , pyrolysis , catalysis
Two phosphorus‐containing diamine compounds, bis(4‐aminophenoxy)‐phenyl phosphine oxide and bis(3‐aminophenyl)phenyl phosphine oxide, were synthesized for use as curing agents of epoxy resins. Phosphorylated epoxy resins were obtained by curing Epon 828 and Eponex 1510 with these two diamine agents. For raising the phosphorus contents of the resulting epoxy resins, the phosphorus‐containing epoxy, bis(glycidyloxy)phenyl phosphine oxide (BGPPO), was also used. These two diamine agents showed similar reactivity toward epoxies. Their reactivities were higher than DDS and lower than DDM. High char yields in TGA evaluation were found for all the phosphorylated epoxy resins, implying their high flame retardancy. The excellent flame‐retardant properties of these phosphorylated epoxy resins were also demonstrated by the high limiting oxygen index (LOI) values of 33 to 51. © 1997 John Wiley & Sons, Inc. J Appl Polym Sci 63: 895–901, 1997