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-002168nas a2200253   4500008004100000022001400041245012400055210006900179260007400248300000800322490000700330520121400337653002401551653002801575653001501603653002101618653001901639653002301658100002601681700002601707700002201733700002801755856013101783       2014                        eng d  a1022-976000aProcessable aromatic polyesters based on bisphenol derived from cashew nut shell liquid: synthesis and characterization0 aProcessable aromatic polyesters based on bisphenol derived from   aVAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDSbSPRINGERcNOV  a6170 v213 a<p>A new bisphenol viz., 4-(4-hydroxyphenoxy)-3-pentadecylphenol (HPPDP) was synthesized starting from cashew nut shell liquid (CNSL). Aromatic (co)polyesters containing ether linkages in the main chain and pendent pentadecyl chains were synthesized by the interfacial polycondensation of HPPDP with terephthalic acid chloride (TPC), isophthalic acid chloride (IPC) and a mixture of TPC and IPC (50: 50 mol %) and by polycondenation of varying composition of HPPDP and bisphenol-A (BPA) with TPC. The resultant (co) polyesters exhibited inherent viscosities in the range 0.70-1.21 dL g(-1) and number-average molecular weights in the range 16,000-48,200 (GPC, polystyrene standard). Polyesters were soluble in common organic solvents such as chloroform and dichloromethane and could be cast into films from chloroform solution. Polyesters exhibited T-10 values in the range 430-455 degrees C and Tg values were in the range 29-202 degrees C. Dynamic mechanical storage modulus and maximum on transition of tan delta curve decreased with increased content of HPPDP in copolyesters. Importantly, the large difference between Tg and T-10 values offers the possibility to process these polyesters in the melt.</p>10aAromatic polyesters10aCashew nut shell liquid10apentadecyl10aPolycondensation10aprocessability10aThermal properties1 aTawade, Bhausaheb, V.1 aSalunke, Jagadish, K.1 aSane, Prakash, S.1 aWadgaonkar, Prakash, P.  uhttps://library.ncl.res.in/content/processable-aromatic-polyesters-based-bisphenol-derived-cashew-nut-shell-liquid-synthesis-0