一种可溶性多氯取代的聚芳醚酮酮的合成

聚芳醚酮具有优异的机械性能、耐热性、耐化学腐蚀性等优点因而被广泛应用于航空航天、电子器件、机械仪表等领域．传统的聚芳醚酮由于其主链的规整性和刚性，使其难溶难熔，给加工和应用带来一定的困难．近20年来，人们不断开发新的品种，通过在聚合物分子主链中引入柔性的醚键、取代侧基(苯基、三氟甲基、甲基等)或者

SYNTHESIS OF A SOLUBLE POLYCHLORO SUBSTITUTED POLY (ARYLETHERKETONEKETONE)

A monomer of tetrachloroterephthaloyl chloride (TCTPC) was prepared by the chlorination of terephthaloyl chloride catalyzed by ferric chloride at 175～180℃ for 10 h,and confirmed by FTIR,MS and elemental analysis.A soluble polychloro substituted poly(aryletherketoneketone) (C-PEKK) was prepared by low temperature solution electrophilic Friedel-Crafts reaction of TCTPC and diphenyl ether (DPE) in 1,2-dichloroethane in the presence of AlCl 3 and N-methyl-2-pyrrolidinone(NMP).Effects of the molar ratio of monomers and the amounts of AlCl 3 and NMP on the polycondensation were investigated.Some propersites of the polymer was characterized by FT-IR,DSC,TGA and WAXD,etc.The results shown that the glass transition temperature(270℃) of the polymer is higher than that of pure PEEK and PEKK,and the polymer was noncrystalline.The polymer was soluble in common organic solvents such as DMF,DMSO,NMP,CHCl 3 and THF at room temperature and showed excellent thermal stability at temperature over 500℃ in air,high char yields of 61% in nitrogen and 54% in air at 700℃.