02117nas a2200253   4500008004100000022001400041245008500055210006900140260006800209300001000277490000800287520123800295653001901533653002601552653002701578653002401605653001601629100002101645700001501666700002101681700002401702700002301726856011401749       2006                        eng d  a0021-899500aSynthesis and characterization of copolyarylates using tin octoate as a catalyst0 aSynthesis and characterization of copolyarylates using tin octoa  a111 RIVER ST, HOBOKEN, NJ 07030 USAbJOHN WILEY & SONS INCcJUL  a70-770 v1013 a<p>A series of copolyarylates of bisphenol A (BPA) with varying ratios of diphenyl terephthalate (DPT) and diphenyl isophthalate (DPI) were prepared by melt polymerization at a temperature ranging from 200 to 290 degrees C under reduced pressure in the presence of tin octoate catalyst. Tin octoate catalyst has been extensively used for the preparation of biodegradable polymers namely, poly(lactic acid), poly(glycolic acid), and poly(lactide-glycolide) copolyesters. However, there are no reports on the preparation of copolyesters by melt polymerization using tin octoate catalyst. The effect of tin octoate catalyst was studied on the preparation of BPA/DPT/DPI copolyarylates. The copolyarylates were characterized by infrared and H-1 NMR spectroscopy, solution viscosity, thermogravimetric analysis, differential scanning calorimetry, and X-ray diffraction. The solution viscosities of copolyarylates were varied from 0.43 to 0.56 dL/g and the glass transition temperature (T-g) of copolyarylates was varied from 155 to 222 degrees C by varying the ratio of DPT and DPI. Most of the copolyarylates were found to be soluble in commonly used organic solvents and had film-forming properties. (c) 2006 Wiley Periodicals, Inc.</p>10acopolyarylates10adiphenyl isophthalate10adiphenyl terephthalate10amelt polymerization10atin octoate1 aWaghmare, P., B.1 aPathak, P.1 aDeshmukh, S., A.1 aIdage, Susheela, B.1 aIdage, Bhaskar, B.  uhttps://library.ncl.res.in/content/synthesis-and-characterization-copolyarylates-using-tin-octoate-catalyst-0