the white polymer melts at 266 u00b0 c as measured by dsc this polymer displays an increase in crystalline structure and strength and exhibits liquid crystal properties the procedure set forth in example 15 is repeated however the ratio of bisphenol a to pyrazine is changed to 80 20 respectively a melting point is detected at 266 u00b0 c along with a broad exotherm centered at 400 u00b0 c properties of this polymer are similar to those of the polymer in example 15 the procedure set forth in example 16 above is used to make a bisphenol a based polyarylate without the incorporation of the pyrazine therein thermal analysis of this polymer shows only a glass transition temperature at 195 u00b0 c no melting point is observed this polymer is substantially less inferior than that polymer of example 16 which incorporates the pyrazine various polymer compositions comprising the particular polymer having incorporated therein the specific substituted pyrazine are prepared using known methods in the polymer composition art the specific polymers are set forth in table 2 the pyrazine formula is that compound which is disclosed herein above in structural formula the polymers listed in table 2 are those polymers which are found to be suitable to have the pyrazines listed used therein each of these pyrazines are found to be suitable in the listed polymers and enhance the physical and chemical properties thereof table 2______________________________________ pyrazine comments example no formula polymer 1 2 3______________________________________18 iii polyester 19 v polyester 20 vi epoxide 21 vii polyetherketone 22 viii polycarbonate 23 ix epoxide 24 x polyamide 25 xi polyamide 26 xiii polyamide imide 27 xiii polyarylate 28 xiv polyetherketone 29 xv polycarbonate 30 xvi polyamide 31 xvii epoxide 32 xviii epoxide ______________________________________ 1 increase in thermal properties over base polymer 2.