کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5203400 1381930 2011 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Synthesis of three novel phosphorus-containing flame retardants and their application in epoxy resins
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
پیش نمایش صفحه اول مقاله
Synthesis of three novel phosphorus-containing flame retardants and their application in epoxy resins
چکیده انگلیسی
One symmetric diamine (4) and two symmetric phenols (5) and (6) were synthesized as phosphorus-containing flame retardants. The synthesis comprised a two-step procedure: the condensation of p-phenylenediamine with benzaldehyde, 4-hydroxybenzaldehyde and 2-hydroxybenzaldehyde respectively, followed by the addition of 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide to the imine linkage. The structures of (4)-(6) were characterized by FTIR, NMR and mass spectra. (4)-(6) served as co-curing agents of diaminodiphenylmethane for epoxy resins, and epoxy thermosets exhibited excellent flame retardancy, moderate changes in glass transition temperature (Tg) and thermal stability. When the phosphorus content reached 1.0 wt.%, the epoxy resin system met the UL-94 V-0 classification and the limiting oxygen index (LOI) reached more than 35.6, probably because of the nitrogen-phosphorus synergistic effect.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer Degradation and Stability - Volume 96, Issue 10, October 2011, Pages 1720-1724
نویسندگان
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