01973nas a2200217   4500008004100000022001400041245013300055210006900188260000800257520111800265653002301383653002301406653003701429653003301466653001901499100002601518700002501544700002801569700002701597856013101624       2024                        eng d  a0954-008300aAromatic (Co)polycarbonates bearing pendant norbornenyl groups: Synthesis, characterization and post-polymerization modification0 aAromatic Copolycarbonates bearing pendant norbornenyl groups Syn  cAUG3 a<p>
	A homo- and three co-polycarbonates (PC-NBs) bearing pendant norbornenyl groups were synthesized via solution polycondensation of triphosgene with 4, 4'-(bicyclo (2.2.1) hept-5-en-2 yl methylene) bis (2-methoxyphenol) (BPA-NB) or various mol % compositions of BPA-NB and bisphenol-A, respectively. 1H-NMR spectroscopy confirmed the chemical structure and composition of PC-NBs. Inherent viscosity and number-average molecular weight (Mn) values of PC-NBs were in the range 0.44 - 0.64 dL g-1 and 21,800 - 34,100 g mol-1, respectively, indicating the formation of polymers of medium to reasonably high molecular weights. Tough, transparent, and flexible films of PC-NBs could be cast from chloroform solution. X-Ray diffraction studies indicated the amorphous nature of PC-NBs. Glass transition temperature (Tg) values, determined by DSC analysis, of PC-NBs were in the range 154 - 175 degrees C and Tg values increased with the increase in mol % of BPA-NB. The post-polymerization modification of a representative PC-NB was demonstrated using 3,6-diphenyl-1,2,4,5-tetrazine via tetrazine-ene reaction.</p>
10a(co)polycarbonates10anorbornenyl groups10apost-polymerization modification10atetrazine-ene click reaction10athermoplastics1 aTalanikar, Aniket, A.1 aNagane, Samadhan, S.1 aWadgaonkar, Prakash, P.1 aRashinkar, Gajanan, S.  uhttps://library.ncl.res.in/content/aromatic-copolycarbonates-bearing-pendant-norbornenyl-groups-synthesis-characterization-and