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Novel Amine-Functionalized Phosphoryl Hydrazine Flame Retardants for Epoxy Resin Systems

Bin Sulayman, Abdulhamid
http://rave.ohiolink.edu/etdc/view?acc_num=dayton154456772870177

Abstract Details

2018, Master of Science (M.S.), University of Dayton, Chemical Engineering.
A series of eight novel phosphoryl hydrazine compounds were evaluated for their effectiveness as co-curing flame retardants (FR) in an epoxy resin system. First, the FR compounds were systematically evaluated with differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) for their behavior in pure form and when co-cured with epoxy. The phosphorous content was kept constant at 2.5 wt% for each formulation. Results showed that three of the FR compounds were able to cure with the epoxy, while the others were not. Incorporation into the network increased the onset temperature of the flame retardant action according to DSC results. Cured samples were also characterized with microscale combustion calorimetry (MCC). Three of the formulations showed excellent flame retardation, as indicated by a 30% reduction in total heat release and three times increase in char yield compared to the control sample (no flame retardant). It proved difficult to scale up the formulations to making resin plaques for further testing due to the release of gas bubbles not observed in prior work with smaller samples. Limited success was achieved with one compound, with which 4 inch x 4 inch cured resin plaques were produced for cone calorimeter testing. Cone calorimeter results indicated good char formation behavior, but only a minor reduction in peak heat release rate (HRR) compared to the control sample. Also, it exhibited a highly erratic char formation and gas/fire plume formation, which led to poor reproducibility in heat release measurements. The level of gas/fire plume formation was undesirably high, but the smoke release rate was much lower than the control. Despite an only minor reduction in peak HRR, the flame-retardant effects that were characterized for this compound showed promise in regards to the mechanism of flame retardancy and lowering of total heat release and total smoke release.
Donald Klosterman (Advisor)
Alexander Morgan (Committee Member)
Vladimir Benin (Committee Member)
92 p.
Chemical Engineering; Materials Science
Phosphoryl Flame Retardants; Flame Retardants for Epoxy Resin Systems; Cone Calorimeter; Micro Combustion Calorimeter

Recommended Citations

Citations

  • Bin Sulayman, A. (2018). Novel Amine-Functionalized Phosphoryl Hydrazine Flame Retardants for Epoxy Resin Systems [Master's thesis, University of Dayton]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=dayton154456772870177

    APA Style (7th edition)

  • Bin Sulayman, Abdulhamid. Novel Amine-Functionalized Phosphoryl Hydrazine Flame Retardants for Epoxy Resin Systems. 2018. University of Dayton, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=dayton154456772870177.

    MLA Style (8th edition)

  • Bin Sulayman, Abdulhamid. "Novel Amine-Functionalized Phosphoryl Hydrazine Flame Retardants for Epoxy Resin Systems." Master's thesis, University of Dayton, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=dayton154456772870177

    Chicago Manual of Style (17th edition)

dayton154456772870177
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This open access ETD is published by University of Dayton and OhioLINK.