Termination Kinetics of the Free-Radical Polymerization of Nonionized Methacrylic Acid in Aqueous Solution

2008 ◽  
Vol 41 (10) ◽  
pp. 3513-3520 ◽  
Author(s):  
Sabine Beuermann ◽  
Michael Buback ◽  
Pascal Hesse ◽  
Robin A. Hutchinson ◽  
Silvia Kukučková ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Free Radical ◽  
Radical Polymerization ◽  
Methacrylic Acid ◽  
Free Radical Polymerization ◽  
Kinetics Of

Critically evaluated rate coefficients for free-radical polymerization Part 6: Propagation rate coefficient of methacrylic acid in aqueous solution (IUPAC Technical Report)

2007 ◽  
Vol 79 (8) ◽  
pp. 1463-1469 ◽  
Author(s):  
Sabine Beuermann ◽  
Michael Buback ◽  
Pascal Hesse ◽  
Frank-Dieter Kuchta ◽  
Igor Lacík ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Free Radical ◽  
Radical Polymerization ◽  
Methacrylic Acid ◽  
Free Radical Polymerization ◽  
Direct Analysis ◽  
Propagation Rate ◽  
Bulk Polymerization ◽  
Size Exclusion ◽  
Rate Coefficients

Critically evaluated propagation rate coefficients, kp, for free-radical polymerization of methacrylic acid, MAA, in aqueous solution are presented. The underlying kp values are from two independent sources, which both used the IUPAC-recommended technique of pulsed-laser-initiated polymerization (PLP) in conjunction with molar mass distribution (MMD) analysis of the resulting polymer by size-exclusion chromatography (SEC). Different methods of measuring the MMD of the poly(MAA) samples have, however, been used: (i) direct analysis via aqueous-phase SEC and (ii) standard SEC with tetrahydrofuran as the eluent carried out on poly(methyl methacrylate) samples obtained by methylation of the poly(MAA) samples from PLP. Benchmark kp values for aqueous solutions containing 15 mass % MAA are presented for temperatures between 18 and 89 °C. The Arrhenius pre-exponential and activation energy of kp at 15 mass % MAA are 1.54 × 106 L mol-1 s-1 and 15.0 kJ mol-1, respectively. Also reported are critically evaluated kp values for 25 °C over the entire MAA concentration range from dilute aqueous solution to bulk polymerization.

Propagation Rate Coefficient of Free-Radical Polymerization of Partially and Fully Ionized Methacrylic Acid in Aqueous Solution

2009 ◽  
Vol 42 (20) ◽  
pp. 7753-7761 ◽  
Author(s):  
Igor Lacík ◽  
Lucia Učňová ◽  
Silvia Kukučková ◽  
Michael Buback ◽  
Pascal Hesse ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Free Radical ◽  
Radical Polymerization ◽  
Methacrylic Acid ◽  
Rate Coefficient ◽  
Free Radical Polymerization ◽  
Propagation Rate ◽  
Propagation Rate Coefficient

Free-Radical Polymerization Kinetics of 2-Acrylamido-2-methylpropanesulfonic Acid in Aqueous Solution

2005 ◽  
Vol 39 (2) ◽  
pp. 509-516 ◽  
Author(s):  
Sabine Beuermann ◽  
Michael Buback ◽  
Pascal Hesse ◽  
Tanja Junkers ◽  
Igor Lacík
Keyword(s):  
Aqueous Solution ◽  
Free Radical ◽  
Radical Polymerization ◽  
Free Radical Polymerization ◽  
Polymerization Kinetics ◽  
Kinetics Of

Non-isothermal Kinetics of Free Radical Polymerization of 2-Phenylethyl (Meth)acrylate

2018 ◽  
Vol 8 (3) ◽  
pp. 585-594
Author(s):  
Khdbudin Mulani ◽  
Ravindra Ghorpade ◽  
Surendra Ponrathnam ◽  
Nayaku Chavan ◽  
Kamini Donde
Keyword(s):  
Free Radical ◽  
Radical Polymerization ◽  
Free Radical Polymerization ◽  
Isothermal Kinetics ◽  
Kinetics Of

The Kinetics of Free-Radical Polymerization: Fundamental Aspects

2002 ◽  
Vol 55 (7) ◽  
pp. 399 ◽  
Author(s):  
G. T. Russell
Keyword(s):  
Molecular Weight ◽  
Steady State ◽  
Free Radical ◽  
Radical Polymerization ◽  
Chain Length ◽  
Free Radical Polymerization ◽  
Length Dependence ◽  
Model Independent ◽  
Living Free Radical Polymerization ◽  
Kinetics Of

Some fundamental aspects of the kinetics of free-radical polymerization are reviewed. So-called classical results for rate and molecular-weight distribution are first of all presented. It is shown how this approach can be built upon when chain-length-dependent termination is allowed, which it always should be. Various termination models are considered, and it is illustrated that although the models are different, rather remarkably they give common, model-independent behaviour. Some leading experimental results regarding the chain-length dependence of termination are summarized, before the chain-length dependence of other reactivities, the variation of reactivities with conversion, and non-steady state experiments are briefly discussed. Finally, living free-radical polymerization as effected by a reversible termination agent is considered. An outline of the kinetics of these systems is given, with the oft-neglected importance of conventional termination being stressed.

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