SYNTHESIS OF NOVEL POLYARYL(ETHER-KETONES) WITH TERT-BUTYL PENDENT GROUPS

Linear polyaryl(ether ketones) containing tert-butyl pendent groups we re prepared from aromatic hydrocarbons and aromatic diacid chlorides, both classes of monomers containing tert-butyl pendent groups. The pol ymers were prepared in high yield and high molecular weight by low-tem perature precipitation polycondensation in 1,2-dichloroethane The pres ence of meta-oriented moieties and bulky pendent groups played a benef icial role with regard to solubility, while the thermal transitions an d thermal resistance were not greatly impaired relative to conventiona l all para-oriented polyaryl(ether-ketones). The current polyaryl(ethe r-ketones) showed glass transition temperatures in the range 170-240 d egrees C and decomposition temperatures, as measured by TGA, of about 500 degrees C. (C) 1998 John Wiley & Sons, Inc.