The present invention is a flame resistant article and related method, made of phenolic triazine resin derived from a cyanato group containing phenolic resin of formula (I), wherein n is a positive whole number greater than or equal to 1; q and r are the same or different at each occurrence and are whole numbers from 0 to 3, with the proviso that the sum of q and r at each occurrence is equal to 3; Z is -CN, or hydrogen and -CN; o and p are the same or different at each occurrence and are whole numbers from 0 to 4 with the proviso that the sum of o and p at each occurrence is equal to 4; -X- is a divalent organic radical; and R3 is the same or different at each occurrence and is a substituent other than hydrogen which is unreactive under conditions necessary to completely cure the copolymer.