02482nas a2200277   4500008004100000022001400041245014400055210006900199260000800268300001200276490000800288520150900296653002801805653002301833653002801856653002101884653002401905100002101929700002501950700002101975700001701996700001802013700001902031700002802050856012602078       2022                        eng d  a1022-135200aSynthesis and characterization of partially biobased aromatic (Co)polycarbonates containing biphenylene units and pendant pentadecyl chains0 aSynthesis and characterization of partially biobased aromatic Co  cJUL  a21004490 v2233 a<p>
	2-Pentadecyl-[1,1''-biphenyl]-4,4''-diol (PBD) is synthesized starting from cashew nut shell liquid-a by-product of cashew processing industry. A new series of partially biobased aromatic (co)polycarbonates possessing biphenylene units and pendant pentadecyl chains is synthesized by solution polycondensation of PBD or varying compositions of PBD and bisphenol-A with triphosgene in dry dichloromethane. Inherent viscosities and number average molecular weights of (co)polycarbonates are in the range 0.51-1.24 dL g(-1) and 18 x 10(3)- 43.4 x 10(3) g mol(-1), respectively indicating the formation of reasonably high molecular weight polymers. Flexible, transparent, and free-standing films of (co)polycarbonates can be cast from chloroform solution. (Co)polycarbonates are characterized using Fourier transform infrared spectroscopy (FTIR), H-1 NMR, C-13 NMR spectroscopy, X-ray diffraction (XRD), differential scanning calorimetry, and thermogravimetric analysis. T-10 and T-g values of (co)polycarbonates are in the range 417-433 and 8-147 degrees C, respectively. It is demonstrated that the T-g values can be tuned by incorporation of appropriate mol% of PBD as a comonomer in Bisphenol-A-based copolycarbonates. The lowering of the T-g values of (co)polycarbonates can be attributed primarily to the packing disruptive effect of flexible pentadecyl chains. Furthermore, the effect of incorporation of PBD as a comonomer on water contact angle values of (co)polycarbonates is evaluated.</p>
10aaromatic polycarbonates10abiobased bisphenol10aCashew nut shell liquid10apentadecyl chain10aRenewable resources1 aIchake, Amol, B.1 aNagane, Samadhan, S.1 aJadhav, Uday, A.1 aTorris, Arun1 aGrau, Etienne1 aCramail, Henri1 aWadgaonkar, Prakash, P.  uhttps://library.ncl.res.in/content/synthesis-and-characterization-partially-biobased-aromatic-copolycarbonates-containing