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Ignition temperatures and pyrolysis of a flame‐retardant methyl methacrylate copolymer containing diethyl(methacryloyloxymethyl)‐phosphonate units
Author(s) -
Price Dennis,
Pyrah Kelly,
Hull T Richard,
Milnes G John,
Wooley W Dave,
Ebdon John R,
Hunt Barry J,
Konkel Christopher S
Publication year - 2000
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 - 10.1002/1097-0126(200010)49:10<1164::aid-pi513>3.0.co;2-m
Subject(s) - fire retardant , copolymer , methyl methacrylate , pyrolysis , materials science , polymer chemistry , depolymerization , phosphonate , char , combustion , methacrylate , chemical engineering , polymer , organic chemistry , chemistry , composite material , engineering
The ignition and pyrolysis of some copolymers of methyl methacrylate (MMA) with diethyl(methacryloyloxymethyl)phosphonate (DEMMP) have been studied by a simple tube furnace and by isothermal and non‐isothermal TGA. The results indicate that copolymers containing DEMMP thermally degrade, under both air and nitrogen, by a mechanism which is more complex than that (simple depolymerization) for poly(methyl methacrylate) (PMMA). The copolymers containing 10 mol% or more of DEMMP are inherently flame retardant in that they fail to autoignite at 480 °C and take longer to autoignite at 490 °C than PMMA or MMA–DEMMP copolymers containing only 5 mol% DEMMP. The formation of a carbonaceous residue or char on combustion of the MMA–DEMMP copolymers suggests that flame retardance is due mainly to reactions in the condensed phase. © 2000 Society of Chemical Industry