02043nas a2200253 4500008004100000022001400041245008800055210006900143260007400212300000900286490000700295520112300302653003401425653001401459653002401473653003301497100002701530700003001557700001901587700001801606700001901624700002901643856011701672 2012 eng d a1022-976000aPhotopolymerization kinetics of 2-phenylethyl (meth) acrylates studied by photo DSC0 aPhotopolymerization kinetics of 2phenylethyl meth acrylates stud aVAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDSbSPRINGERcJAN a98110 v193 a

The present work deals with the photopolymerization of 2-phenylethyl (meth)acrylates and estimation of their kinetic parameters. Formulations were made by independently homogenizing the monomers with photoinitiators of two different classes. Two different compositions of photoinitiators were used to study the effect of concentration of photoinitiator on cure kinetics. These compositions obtained were tested for photo curing performance using differential photocalorimetry (DPC) or photo DSC under polychromatic radiation. The heat flow against time was recorded for all formulations under isothermal conditions and the rates of polymerization as well as the percentage conversions were estimated. It was observed that due to a longer timescale for reaction diffusion, the methacrylate formulations showed a higher conversion than acrylate formulations. Other parameters such as induction time, maximum rate and conversion attained as well as the time to attain peak maximum were noted. The photopolymerization and kinetic estimations of the formulations including evaluation of kinetic models are discussed.

10aBimolecular termination model10aPhoto DSC10aPhotopolymerization10aVariable autocatalytic model1 aGhorpade, Ravindra, V.1 aBhosle, Sonali, Madhavrao1 aPonrathnam, S.1 aRajan, C., R.1 aChavan, Nayaku1 aHarikrishna, Reghunathan uhttps://library.ncl.res.in/content/photopolymerization-kinetics-2-phenylethyl-meth-acrylates-studied-photo-dsc-001889nas a2200193 4500008004100000022001400041245011700055210006900172260008800241300001200329490000700341520109100348653003201439653003301471653001901504653001401523100002901537856012901566 2014 eng d a1060-132500aKinetics of photocationically curable formulations involving glycerol diglycidyl ether and phenyl glycidyl ether0 aKinetics of photocationically curable formulations involving gly a530 CHESTNUT STREET, STE 850, PHILADELPHIA, PA 19106 USAbTAYLOR & FRANCIS INCcOCT a788-7950 v513 a

Kinetic analysis of formulations based on glycerol diglycidyl ether and phenyl glycidyl ether were carried out in the presence of sulfonium salt as initiator at 35 mW cm(-2) using photo differential scanning calorimeter and the final conversion was found to increase with an increase in phenyl glycidyl ether content. The effects of formulation monomer ratios at three different temperatures were studied. The variations in the observed kinetic parameters can be related to increase in mobility of reactive species with temperature, distance of counter ion from the propagating cationic center, as well as extent of crosslinking reaction which controlled the course and duration of the reaction. The applicability of autocatalytic kinetic model was also evaluated and the system underwent early gelation and the activation energy decreased with an increase in phenyl glycidyl ether content. Analysis of stable photocured films containing glycerol diglycidyl ether and phenyl glycidyl ether showed better thermal stability than rigid films obtained with glycerol diglycidyl ether.

10aautocatalytic kinetic model10aCationic photopolymerization10aGlycidyl ether10aPhoto DSC1 aHarikrishna, Reghunathan uhttps://library.ncl.res.in/content/kinetics-photocationically-curable-formulations-involving-glycerol-diglycidyl-ether-and-002027nas a2200205 4500008004100000022001400041245011500055210006900170260006700239300001000306490000700316520126400323653001301587653001801600653001301618653001401631653002401645100002901669856012301698 2014 eng d a0730-667900aPhotopolymerization kinetics of block polyether based terminal urethane methacrylate with/without cross-linker0 aPhotopolymerization kinetics of block polyether based terminal u a111 RIVER ST, HOBOKEN 07030-5774, NJ USAbWILEY-BLACKWELLcFEB a214180 v333 a

The present work deals with the photopolymerization of difunctional macromonomer with a polyether chain and urethane methacrylate terminations. Macromonomeric formulations were prepared by mixing macromonomer with two different concentrations of photoinitiator. Formulations were also prepared by the addition of 10 wt% of soft-segmented difunctional cross-linker to the abovementioned macromonomic formulations. All formulations were then subjected to photopolymerization studies and the effects of light intensity on the photopolymerization kinetics were studied at two different isothermal conditions using photo differential scanning calorimetry (Photo DSC) with polychromatic radiation. The isothermal heat flow against time was recorded for all formulations and the kinetic parameters were noted. It was observed that the rate of maximum polymerization as well as peak maximum time showed a general trend. However, the ultimate conversion as well as the conversion at maximum rate did not show any trend due to diffusional restrictions imparted by the increase in viscosity with conversion. The photopolymerization of the formulations and curing kinetics including evaluation of autocatalytic model are discussed. (C) 2014 Wiley Periodicals, Inc.

10akinetics10aMacromonomers10aModeling10aPhoto DSC10aPhotopolymerization1 aReghunathan, Harikrishna uhttps://library.ncl.res.in/content/photopolymerization-kinetics-block-polyether-based-terminal-urethane-methacrylate-0