02410nas a2200229   4500008004100000022001400041245015500055210006900210260006700279300001200346490000700358520145600365653004101821653004401862653002501906653002001931653002901951100002201980700002202002700002802024856012802052       2015                        eng d  a0959-810300aNew atom transfer radical polymerization initiator based on phenolphthalein for the synthesis of bis-allyloxy functionalized polystyrene macromonomers0 aNew atom transfer radical polymerization initiator based on phen  a111 RIVER ST, HOBOKEN 07030-5774, NJ USAbWILEY-BLACKWELLcMAR  a413-4200 v643 a<p>A new atom transfer radical polymerization (ATRP) initiator, namely 2-(1,1-bis(4-(allyloxy)phenyl)-3-oxoisoindolin-2-yl)ethyl 2-bromo-2-methylpropanoate, was synthesized starting from phenolphthalein, a commercially available and an inexpensive chemical. Well- defined bis-allyloxy functionalized polystyrene macromonomers (M-n,M-GPC 4800-11 700gmol(-1)) with controlled molecular weight and narrow molecular weight distribution (1.05-1.09) were synthesized using ATRP by varying the monomer to initiator feed ratio. The presence of allyloxy functionality on polystyrene was confirmed by Fourier transform infrared and H-1 NMR spectroscopy. A kinetic study of polymerization revealed pseudo-first-order kinetics with respect to monomer consumption. Initiator efficiency was found to be in the range 0.80-0.95. Matrix-assisted laser desorption ionization time of flight spectra showed a narrow molecular weight distribution with control over the molecular weight. The reactivity of the allyloxy groups on polystyrene was successfully demonstrated by quantitative photochemical thiol-ene click reaction with benzyl mercaptan as the model thiol reagent. Furthermore, the thiol-ene click reaction was exploited to introduce other reactive functional groups such as hydroxyl and carboxyl by reaction of ,-bis-allyloxy functionalized polystyrene with 2-mercaptoethanol and 3-mercaptopropionic acid, respectively. (c) 2014 Society of Chemical Industry</p>10aatom transfer radical polymerization10abis-allyloxy functionalized polystyrene10afunctional initiator10aphenolphthalein10athiol-ene click reaction1 aPatil, Sachin, S.1 aMenon, Shamal, K.1 aWadgaonkar, Prakash, P.  uhttps://library.ncl.res.in/content/new-atom-transfer-radical-polymerization-initiator-based-phenolphthalein-synthesis-bis-002012nas a2200253   4500008004100000022001400041245013600055210006900191260000900260300001200269490000700281520112100288653002301409653000601432653002401438653002001462653002301482653002401505100002601529700002501555700002801580700002701608856012301635       2024                        eng d  a1060-132500aAromatic (co)polycarbonates bearing pendant 2,3-dimethylmaleimido group based upon a new phthalimidine-containing "cardo" bisphenol0 aAromatic copolycarbonates bearing pendant 23dimethylmaleimido gr  cOCT   a795-8040 v613 a<p>
	A new ``cardo'' bisphenol viz., 1-(2-(1,1-bis(4-hydroxyphenyl)-3-oxoisoindolin-2-yl)ethyl)-3,4-dimethyl- 1H-pyrrole-2,5-dione (PPH-MA) was synthesized in a two-step reaction sequence starting from phenolphthalein. PPH-MA was utilized as a step-growth monomer for the synthesis of a homo- and fourco-polycarbonates bearing pendant 2,3-dimethylmaleimido groups (PC-MAs) via solution polycondensation of PPH-MA or various mol % compositions of PPH-MA and bisphenol-A, respectively, with triphosgene.H-1 NMR spectroscopy confirmed the chemical structure and composition of PC-MAs. Inherent viscosity and number average molecular weight values of PC-MAs were in the range 0.45-0.64 dL g(-1) and 18,300 - 36,200 g mol(-1), respectively, indicating the formation of polymers of medium to reasonably high molecular weights. Tough, transparent and flexible films of PC-MAs could be cast from chloroform solution. X-ray diffraction studies indicated the amorphous nature of PC-MAs. The 10% weight loss temperature (T-10) values of PC-MAs were in the range 373-443 degrees C indicating their good thermal stability.</p>
10a(co)polycarbonates10a210a3-dimethylmaleimido10aphenolphthalein10aphthalimidine ring10a``cardo'' bisphenol1 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-23-dimethylmaleimido-group-based-upon-new