Journal ArticleDOI
Propagation Kinetics of Methacrylic Acid Studied by Pulsed-Laser Polymerization
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In this paper, the propagation rate coefficients kp for free radical polymerizations of methacrylic acid (MAA) using pulsed-laser polymerizations (PLP) combined with size exclusion chromatography (SEC).Abstract:
Propagation rate coefficients kp have been determined for free radical polymerizations of methacrylic acid (MAA) using pulsed-laser polymerizations (PLP) combined with size exclusion chromatography (SEC). The temperature dependence of kp has been studied for polymerizations of 33 vol % monomer in methanol in the temperature range from 20 to 60 °C. kp is described by the following Arrhenius relation: ln[kp/L·mol-1·s-1] = (13.31 ± 0.49) − (2132 ± 133)K/T. Variations in MAA concentration and the type of solvent do not influence kp significantly. Any distinctions elicited in kp by these variations are of the order of the experimental uncertainty and are much smaller than the relative changes in the MAA monomer−dimer equilibrium observed by FTIR spectroscopy. The magnitude of kp and its variation with temperature are similar to results reported for methyl methacrylate and the rest of the methacrylate family.read more
Citations
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Journal ArticleDOI
Rate coefficients of free-radical polymerization deduced from pulsed laser experiments
Sabine Beuermann,Michael Buback +1 more
TL;DR: In this paper, the termination rate of free-radical polymerization is measured using a single pulse (SP)-PLP method, which combines PLP with time-resolved NIR spectroscopy.
Journal ArticleDOI
Kinetics of Atom Transfer Radical Polymerization
TL;DR: In this paper, a review encompasses the fundamentals of kinetics of atom transfer radical polymerization (ATRP) and guidelines for synthesis of polymers with targeted architectures, predetermined molecular weights, narrow molecular weight distributions, and high retained chain end functionality are presented.
Journal ArticleDOI
Fast Monomers: Factors Affecting the Inherent Reactivity of Acrylate Monomers in Photoinitiated Acrylate Polymerization
Johan Franz Gradus Antonius Jansen,Aylvin Jorge Angelo Athanasius Dias,Marko Dorschu,Betty Coussens +3 more
TL;DR: In this article, the effect of molecular structure on photoinitiated polymerization of acrylates was investigated, and it was found that preorganization via hydrogen bonding enhances the maximum rate of polymerization (Rp).
Journal ArticleDOI
Free-Radical Propagation Rate Coefficient of Nonionized Methacrylic Acid in Aqueous Solution from Low Monomer Concentrations to Bulk Polymerization
TL;DR: In this article, the propagation rate coefficient, kp, for free-radical polymerization of nonionized methacrylic acid (MAA) in aqueous solution has been studied via pulsed laser polymerization (PLP) in conjunction with size-exclusion chromatography (SEC).
Journal ArticleDOI
Propagation Kinetics of Acrylic and Methacrylic Acid in Water and Organic Solvents Studied by Pulsed-Laser Polymerization
TL;DR: Pulsed laser-induced polymerization in combination with analysis of formed polymer by size exclusion chromatography (SEC) has been successfully applied in determining propagation rate coefficient, kp, of acrylic and methacrylic acid in organic solvents and water as discussed by the authors.
References
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Journal ArticleDOI
Determination of Free-Radical Propagation Rate Coefficients of Butyl, 2-Ethylhexyl, and Dodecyl Acrylates by Pulsed-Laser Polymerization
TL;DR: In this paper, the molecular weight distribution (MWD) of polymer produced by pulsed-laser polymerization (PLP) is used for the determination of free-radical propagation rate coefficients (kp).
Journal ArticleDOI
The laser-flash-initiated polymerization as a tool of evaluating (individual) kinetic constants of free-radical polymerization, 2†. The direct determination of the rate of constant of chain propagation‡
TL;DR: In this article, a pseudostationary state is established which is characterized by a periodic profile of the (polymer) radical concentration, and it is shown that the formation of dead polymer molecules with a chain length close to L 0 is favored.
Journal ArticleDOI
Pulsed-Laser Polymerization Measurements of the Propagation Rate Coefficient for Butyl Acrylate
Robert A. Lyons,Jelica Hutovic,Mark C. Piton,David I. Christie,Paul A. Clay,Bart G. Manders,Scott H. Kable,Robert G. Gilbert +7 more
TL;DR: In this paper, the propagation rate coefficient (kp) of butyl acrylate obtained from pulsed-laser polymerization (PLP) was measured for a series of measurements.
Journal ArticleDOI
Laser-flash-initiated polymerization as a tool for evaluating (individual) kinetic constants of free-radical polymerization—5. Complete analysis by means of a single experiment
TL;DR: In this article, the rate constants of propagation kp were determined from the points of inflection in the GPC-curves while kp2/kt was calculated from the product of rate of polymerization and P w.
Journal ArticleDOI
Effect of the Reaction Medium on Radical Copolymerization
TL;DR: In contrast to early investigations on radical copolymerization [1], abounding experimental data accumulated during the last two decades has made it possible to establish an unequivocal effect of the reaction medium in at least some monomer systems as mentioned in this paper.
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