Differential scanning photocalorimetry studies of 1,6‐hexanedioldiacrylate photopolymerization initiated by some organic azides

Abadie, M. J. M.; Новикова, О. О.; Voytekunas, Vanda Yu.; Syromyatnikov, V. G.; Kolendo, A.

doi:10.1002/app.12771

Cited by 15 publications

(10 citation statements)

References 4 publications

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“…The Tables 1 and 2 show that for both acrylates and methacrylates, induction time decreases with an increase in concentration of photoinitiator and temperature. This is due to the enhancement of the rate of photopolymerization at the beginning of the reaction resulting from an increase in number of propagating chains and mobility of the system [28]. The peak maximum time is also found to show the same behavior due to the same effect.…”

Section: Estimation Of Kinetic Parametersmentioning

confidence: 51%

Photopolymerization kinetics of 2-phenylethyl (meth)acrylates studied by photo DSC

et al. 2012

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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.

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Section: Estimation Of Kinetic Parametersmentioning

confidence: 51%

Photopolymerization kinetics of 2-phenylethyl (meth)acrylates studied by photo DSC

et al. 2012

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“…The kinetics of photo‐polymerization of HDDA and along with Al 2 O 3 ceramic have been studied extensively by differential photo calorimetry (DPC) 6–8. After realizing the net shape, it is equally important to eliminate the organic content without shape deformation.…”

Section: Introductionmentioning

confidence: 99%

Degradation kinetics of poly(HDDA‐co‐MMA)

Goswami

Umarji

Madras

2010

J of Applied Polymer Sci

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1,6-hexanediol diacrylate (HDDA) and methyl methacrylate (MMA) were copolymerized in different weight ratios using UV light induced photo-polymerization to give poly(HDDA-co-MMA). Differential scanning calorimetry shows that copolymer was formed. The thermogravimetric and differential scanning calorimetric studies with different heating rates were carried out on these copolymers to understand the nature of degradation and to determine its kinetics. Different kinetic models were adopted to evaluate various parameters like the activation energy, the order, and the frequency factor. These analyses are important to study the binder removal from 3D-shaped ceramic objects made by techniques like Solid free form fabrication.

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“…The degree of conversion was monitored by using a DSC2000 (TA Instruments, New Castle, DE) differential scanning calorimeter with photocuring accessory (photo‐DSC) matching the shrinkage measurement with the same curing condition, and sample weight was less than 5 mg. The enthalpy value, 54,800 J/mol, was used as the theoretical heat evolved for methacrylate double bonds and 80,256 J/mol, was used for acrylate double bonds. The sampling interval for photo‐DSC measurement was 0.5 s.…”

Section: Methodsmentioning

confidence: 99%

Effect of Monomer Structure on Real‐Time UV‐Curing Shrinkage Studied by a Laser Scanning Approach

Zhao

et al. 2012

Adv Polym Technol

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The very fast curing rate, low coating thickness (<100 μm), and a wide range of viscosity of ultraviolet (UV) systems hindered the study of UV-curing shrinkage. A recently developed laser scanning method provided a chance to directly measure the real-time (UV-curing shrinkage. The effect of monomer chain lengths (degree of ethoxylation), monomer functionality, and monomer type (acrylate vs. methacrylate) on the shrinkage rates and shrinkage of UV monomers was systematically investigated. The concentration of double bonds and degree of conversion played the dominant role in the photopolymerization shrinkage and shrinkage rate. The main reason for the low shrinkage of methacrylate was that the low reactivity of methacrylate decreased the degree of conversion. The ethoxylation was an attractive way to lower the shrinkage and decrease the shrinkage rate due to significant reduction of the concentration of double bonds. The reduction of functionality was not obvious in decreasing the shrinkage or maximum shrinkage rate due to the combination effect of the concentration of double bonds and the degree of conversion. Besides, heat expansion attributed to polymerization could bring forward the maximum shrinkage rate from the shrinkage stage to the expansion stage. C 2012 Wiley Periodicals, Inc. Adv Polym Techn 2013, 32, 21331; View this article online at wileyonlinelibrary.com.

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Differential scanning photocalorimetry studies of 1,6‐hexanedioldiacrylate photopolymerization initiated by some organic azides

Abstract: New types of radical photoinitiators, based on azido and diazido structures, were compared to the reactivity of pure xanthone by using a photocalorimetry technique. Our results show that these photoinitiators are good candidates for radical polymerization.

Cited by 15 publications

References 4 publications

Photopolymerization kinetics of 2-phenylethyl (meth)acrylates studied by photo DSC

Photopolymerization kinetics of 2-phenylethyl (meth)acrylates studied by photo DSC

Degradation kinetics of poly(HDDA‐co‐MMA)

Effect of Monomer Structure on Real‐Time UV‐Curing Shrinkage Studied by a Laser Scanning Approach

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