Measurements for Addition Reaction Rate Constants of Organic Free Radicals to Maleic Anhydride by Means of Pulsed EPR Spectroscopy with Laser Excitation

2018 ◽  
Vol 49 (8) ◽  
pp. 813-824
Author(s):  
Hirona Takahashi ◽  
Kenta Hagiwara ◽  
Akio Kawai
Keyword(s):  
Free Radicals ◽  
Maleic Anhydride ◽  
Epr Spectroscopy ◽  
Rate Constants ◽  
Reaction Rate ◽  
Laser Excitation ◽  
Addition Reaction ◽  
Pulsed Epr ◽  
Reaction Rate Constants

Simulation of Crosslink and Graft Mechanism of Hydrogenated-NBR/ZINC Di-Methacrylate Composites by Moving Die Rheometer

2002 ◽  
Vol 75 (5) ◽  
pp. 943-954 ◽  
Author(s):  
Takashi Sato ◽  
Akio Fujino ◽  
Sachio Hayashi ◽  
Motofumi Oyama ◽  
Katsumichi Ono
Keyword(s):  
Experimental Data ◽  
Genetic Algorithm ◽  
Rate Constants ◽  
Reaction Rate ◽  
Addition Reaction ◽  
Algorithm Optimization ◽  
Reaction Rate Constants ◽  
Data Comparison ◽  
Graft Reaction ◽  
Comparison With Experimental Data

Abstract This paper studies the crosslink and graft mechanism of hydrogenated-NBR/zinc di-methacrylate (HNBR/ZDMA) composites. The experiments to determine the rate constants of crosslink and graft reaction formulas are from Moving Die Rheometer (MDR) data. Comparison with experimental data and the solution of simultaneous ordinary differential equations for the crosslink and graft reactions are performed. Genetic algorithm optimization of the reaction rate constants allowed for simulation of crosslinking and graft reaction process. This simulation predicts that the HNBR/peroxide cure system will contain 0.1052-mole/l crosslink between matrix HNBR polymer at 2 phr.-peroxide concentration. The crosslink concentration of 0.1052-mole/l is composed of 0.0308-mole/l-addition reaction and 0.0744-mole/l-termination reaction. Moreover, the HNBR/ZDMA cure system contains 0.0148-mole/l graft of poly-ZDMA to HNBR and 0.0903-mole/l crosslink between matrix HNBR polymer at a 2 phr.-peroxide concentration.

Isotope effects in solution: contrasts between muonium and hydrogen in reactions with acetone

1990 ◽  
Vol 68 (10) ◽  
pp. 1719-1724 ◽  
Author(s):  
David C. Walker
Keyword(s):  
Free Radicals ◽  
Physical Properties ◽  
Rate Constants ◽  
Nuclear Physics ◽  
Reaction Rate ◽  
Isotope Effects ◽  
Kinetic Isotope Effects ◽  
Reaction Rate Constants ◽  
Thiyl Radicals ◽  
Kinetic Isotope

Munonium atoms are hydrogen isotopes with positive muons rather than protons, deuterons, or tritons as nuclei. Thus, they have one ninth the mass of 1H, and microsecond lifetimes. By using nuclear physics counting techniques, muonium can be studied in a wide variety of media and its chemical and physical properties used to appraise hydrogen. Results are described for the interaction of muonium with acetone, showing two types of kinetic isotope effects, formation of free radicals, evidence for intermolecular "muonium bonding", and micelle-induced enhancements of reaction rate constants. Keywords: isotope effects, muonium atoms, muonium bonding, thiyl radicals, micelles.

scholarly journals Correlation of Isoprene-Maleic Anhydride Reaction Rate Constants in Mixed Solvents

2006 ◽  
Vol 13 (2) ◽  
pp. 123-127
Author(s):  
Haruo KATO ◽  
Yu ITO ◽  
Setsuko YONEZAWA ◽  
Katsumi HONDA ◽  
Yasuhiko ARAI
Keyword(s):  
Maleic Anhydride ◽  
Rate Constants ◽  
Reaction Rate ◽  
Mixed Solvents ◽  
Reaction Rate Constants

scholarly journals Correlation of Reaction Rate Constants for Isoprene and Maleic Anhydride in Mixed Solvents

2005 ◽  
Vol 17 (2) ◽  
pp. 39-41
Author(s):  
Haruo KATO ◽  
Yu ITO ◽  
Setsuko YONEZAWA ◽  
Katsumi HONDA ◽  
Yasuhiko ARAI
Keyword(s):  
Maleic Anhydride ◽  
Rate Constants ◽  
Reaction Rate ◽  
Mixed Solvents ◽  
Reaction Rate Constants
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