Journal
POLYMER DEGRADATION AND STABILITY
Volume 133, Issue -, Pages 350-357Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.polymdegradstab.2016.09.014
Keywords
Flame retardant; Triazine-trione; DOPO; Epoxy; Synergistic effect
Categories
Funding
- National Nature Science Foundation of China [21374003]
- Beijing Municipal Education Commission [KZ201510011009]
- Beijing Nature Science Foundations [KZ201510011009]
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A flame retardant TAD constructed by phosphaphenanthrene and triazine-trione groups was synthesized via addition reaction between triallyl isocyanurate (TALC) and 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO). Then, the molecular structure and thermal stability of TAD were characterized. To research its flame-retardant behaviors, TAD was incorporated into epoxy resin, diglycidyl ether of bisphenol-A, cured by 4,4'-diamino-diphenyl sulfone (DDS). TAD obviously increased the LOI values and UL94 rating of epoxy resin thermosets. TAD also reduced the values including peak of heat release rate (pk-HRR), total heat release (THR), average effective heat of combustion (av-EHC), average CO2 yield and total mass loss (TML), and increased average CO yields of epoxy thermosets. Further, the different decrease ratio of av-EHC and TML from thermoset containing TAD reveals that TAD exerted more gas-phase flame-retardant effect than condensed-phase effect. The opinion also was testified by the TAD/EP residues with loosen morphology from the cone calorimeter test. The analyzed pyrolysis route of TAD reveals that phosphaphenanthrene group mainly exerted quenching effect and the triazine-trione group exerted gas dilution effect. The excellent flame-retardant performance of TAD is resulted by the group synergistic effect from the two typical flame-retardant groups: phosphaphenanthrene and triazine-trione. (C) 2016 Elsevier Ltd. All rights reserved.
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