Gas-phase flame-retardant effects of a bi-group compound based on phosphaphenanthrene and triazine-trione groups in epoxy resin

详细信息    查看全文

• 作者：Shuo Tang^a ; ^b ; Lijun Qian^b ; ^{qianlj@th.btbu.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; ^{qianbtbu@163.com" class="auth_mail" title="E-mail the corresponding author} ; Xinxin Liu^b ; Yuping Dong^a ; ^{chdongyp@bit.edu.cn" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Flame retardant ; Triazine-trione ; DOPO ; Epoxy ; Synergistic effect
• 刊名：Polymer Degradation and Stability
• 出版年：2016
• 出版时间：November 2016
• 年：2016
• 卷：133
• 期：Complete
• 页码：350-357
• 全文大小：1565 K

文摘

A flame retardant TAD constructed by phosphaphenanthrene and triazine-trione groups was synthesized via addition reaction between triallyl isocyanurate (TAIC) 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.