02286nas a2200277   4500008004100000022001400041245015000055210006900205260008700274300001200361490000700373520120900380653001301589653001401602653001301616653003701629653003001666653002101696653002301717100002901740700002601769700002601795700002701821700002801848856013201876       2013                        eng d  a0954-008300aSynthesis and characterization of poly(ether ether ketone)s and poly(ether ether ketone ketone) s containing pendant biphenyl and naphthyl groups0 aSynthesis and characterization of polyether ether ketones and po  a1 OLIVERS YARD, 55 CITY ROAD, LONDON EC1Y 1SP, ENGLANDbSAGE PUBLICATIONS LTDcMAY  a260-2670 v253 a<p>New poly(ether ether ketone)s (PEEKs) and poly(ether ether ketone ketone)s (PEEKKs) containing pendant biphenyl and naphthyl groups were synthesized by nucleophilic substitution reaction of each of the four bisphenols viz., 1-(4- biphenylyl)- 1,1- bis(4- hydroxyphenyl) ethane, 1-(4- biphenylyl)- 1,1- bis(3- methyl, 4- hydroxyphenyl) ethane, 4,4'-[1-(2- naphthalenyl) ethylidene] bis-phenol and 4,4'-[1-(2- naphthalenyl) ethylidene] bis-3-methylphenol with 4,4'- difluorobenzophenone and 1,3- bis(4- fluorobenzoyl) benzene in a solvent mixture of N,N-dimethylacetamide and toluene in the presence of anhydrous potassium carbonate. Inherent viscosities and number-average molecular weights of polymers were in the range of 0.42-0.86 dl/g and 2.40-7.55 x 10(4), respectively. PEEKs and PEEKKs were amorphous in nature and were readily soluble in a wide range of organic solvents and could be cast into flexible and tough films from chloroform solution. Glass transition temperature of PEEKs and PEEKKs were in the range of 180 degrees C -200 degrees C. T-10 values of PEEKs and PEEKKs were in the range of 424 degrees C-512 degrees C in nitrogen atmosphere, indicating their good thermal stability.</p>10abiphenyl10abisphenol10anaphthyl10apoly(ether ether ketone ketone)s10apoly(ether ether ketone)s10aPolycondensation10aThermal properties1 aHonkhambe, Pandurang, N.1 aDhamdhere, Neelam, A.1 aTawade, Bhausaheb, V.1 aSalunkhe, Manikrao, M.1 aWadgaonkar, Prakash, P.  uhttps://library.ncl.res.in/content/synthesis-and-characterization-polyether-ether-ketones-and-polyether-ether-ketone-ketone-s-0