%0 Journal Article
%T Novel halogen-free flame retardant thermoset from a hybrid hexakis (methoxymethyl) melamine/phosphorus-containing epoxy resin cured with phenol formaldehyde novolac
%J eXPRESS Polymer Letters
%D 2009
%I Budapest University of Technology
%R 10.3144/expresspolymlett.2009.97
%X This paper describes the curing behaviours, thermal properties and flame-resistance of a novel halogen-free epoxy hybrid thermoset, prepared by the curing reaction of hexakis (methoxymethyl) melamine (HMMM), a phosphorouscontaining epoxy resin (EPN-D) with 9, 10-dihydro-9-oxa-10-phosphaphenanthrene 10-oxide (DOPO) group and phenol formaldehyde novolac (n-PF). The resultant thermosets showed high glass-transition temperatures (Tg, 123¨C147¡ãC) as determined by thermal mechanical analysis (TMA), excellent thermal stability with high 5 wt% decomposition temperatures (Td,5% ¡Ý 308¡ãC) and high char yields (Yc ¡Ý 39.4 wt%) from the thermogravimetric analysis (TGA). All the cured EPND/ HMMM/n-PF hybrid resins achieved the UL 94 V-0 grade with high limited oxygen indices (LOI > 45.7). It is found that phosphorous and nitrogen elements in the cured EPN-D/HMMM/n-PF hybrid resins had a positive synergistic effect on the improvement of the flame retardancy.
%K Thermosetting resins
%K Thermal properties
%K Flame-retardancy
%K epoxy
%U http://www.expresspolymlett.com/letolt.php?file=EPL-0001169&mi=cd