Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 8 of 8
Full-Text Articles in Engineering
A Study Of Homogeneous Catalysis By High-Pressure Kinetics. The Mechanism Of Catalysis Of A Diels—Alder Reaction, Bruce E. Poling, Charles A. Eckert
A Study Of Homogeneous Catalysis By High-Pressure Kinetics. The Mechanism Of Catalysis Of A Diels—Alder Reaction, Bruce E. Poling, Charles A. Eckert
Chemical and Biochemical Engineering Faculty Research & Creative Works
The application of high-pressure kinetics as a tool to investigate the detailed mechanism of catalysis of a reaction is demonstrated. Activation volumes have been determined for the Diels-Alder addition of 2, 3-dimethylbutadiene to n-butyl acrylate, both uncatalyzed and catalyzed with AICI3. Also, partial molal volumes of reactants and products have been measured. From these data it is shown that the volume profile along the reaction coordinate is similar for both the catalyzed and uncatalyzed reactions. Further, both reactions proceed by a concerted one-step mechanism through a compact transition state with maximum accumulation of double bonds. Thus, the role of the …
Discussion, A. G. Fabula, Gary Kent Patterson
Discussion, A. G. Fabula, Gary Kent Patterson
Chemical and Biochemical Engineering Faculty Research & Creative Works
No abstract provided.
The Plasma Polymerization Of Vinyl Monomers. I. The Design, Construction, And Operation Of An Inductively Coupled Plasma Generator And Preliminary Studies With Nine Monomers, L. F. Thompson, Kenneth G. Mayhan
The Plasma Polymerization Of Vinyl Monomers. I. The Design, Construction, And Operation Of An Inductively Coupled Plasma Generator And Preliminary Studies With Nine Monomers, L. F. Thompson, Kenneth G. Mayhan
Chemical and Biochemical Engineering Faculty Research & Creative Works
An apparatus was constructed which would allow vinyl‐type monomers (and others) to polymerize at ambient temperatures in the presence of an inductively coupled RF field. The details of the construction of the system are reported along with preliminary results obtained from nine monomers: styrene, methylvinyldichlorosilane, vinyl acetate, acrylonitrile, vinyl fluoride, 1,1‐difluoroethylene, vinyl chloride, ethylene, and 1,3‐butadiene. Copyright © 1972 John Wiley & Sons, Inc.
The Plasma Polymerization Of Vinyl Monomers. Ii. A Detailed Study Of The Plasma Polymerization Of Styrene, L. F. Thompson, Kenneth G. Mayhan
The Plasma Polymerization Of Vinyl Monomers. Ii. A Detailed Study Of The Plasma Polymerization Of Styrene, L. F. Thompson, Kenneth G. Mayhan
Chemical and Biochemical Engineering Faculty Research & Creative Works
A study has been made on the plasma polymerization of styrene monomer in a cold, low‐power, inductively coupled RF plasma. Styrene monomer yielded an insoluble, crosslinked film which was slightly colored. A kinetic study is reported for styrene. The effects of power level, bleed rate of monomer, pressure, and reactor geometry on the rate of polymer formation are reported. A mechanism is postulated for plasma polymerization. It was found that the initiation step was the rate controlling step and that the reaction followed a cationic polymerization scheme. Both crosslinking and discoloration of the polymers occur at the time of polymerization …
Kinetic Analysis Of The Radiation Polymerization Of Methyl Methacrylate–Kaolin Clay Composites, J. J. Beeson, Kenneth G. Mayhan
Kinetic Analysis Of The Radiation Polymerization Of Methyl Methacrylate–Kaolin Clay Composites, J. J. Beeson, Kenneth G. Mayhan
Chemical and Biochemical Engineering Faculty Research & Creative Works
In the first of a two‐part series, a kinetic study has been made on the effects of gamma rays (60Co) in air and inert gas on the polymerization of a 50:50 weight‐mixture methyl methacrylate (MMA)–kaolin clay system. The effect of dose rate (7.35–24.9 rads/sec), temperature (25° to 75°C), and total dose on the percentage conversion of monomer to polymer was studied. The rate of formation of polymer at 25°C in the composite system was found to be faster when compared to a bulk MMA system at the same dose rate. This acceleration showed that the clay had a catalytic effect …
Characterization Of Poly(Methyl Methacrylate) From Radiation‐Induced Polymerization In The Presence Of A Kaolin Clay Substrate, J. J. Beeson, Kenneth G. Mayhan
Characterization Of Poly(Methyl Methacrylate) From Radiation‐Induced Polymerization In The Presence Of A Kaolin Clay Substrate, J. J. Beeson, Kenneth G. Mayhan
Chemical and Biochemical Engineering Faculty Research & Creative Works
Two types of polymer are formed in the radiation‐initiated polymerization of methyl methacrylate (MMA)–kaolin clay complexes. Homopolymer can be extracted from the complex by the use of organic solvents. Inserted polymer must be removed by dissolution of the polymer–clay complex with hydrofluoric acid. The polymers formed show no differences in structure (as determined by infrared analysis), had high molecular weights (1–5 x 106), and had similar molecular weight distributions (as determined by GPC). The molecular weights of the homopolymer increased as temperature increased (25°–75°C), and dose rate decreased (24.9–7.35 rads/sec). The isotacticity of the polymers when compared to irradiated bulk …
Entrance Effects On Capillary Degradation Of Dilute Polystyrene Solutions, J. D. Culter, Kenneth G. Mayhan, Gary Kent Patterson, A. A. Sarmasti, J. (Jacques) L. Zakin
Entrance Effects On Capillary Degradation Of Dilute Polystyrene Solutions, J. D. Culter, Kenneth G. Mayhan, Gary Kent Patterson, A. A. Sarmasti, J. (Jacques) L. Zakin
Chemical and Biochemical Engineering Faculty Research & Creative Works
No abstract provided.
Saturated Enthalpies For Mixtures Of Propane And Propene, David B. Manley, George W. Swift
Saturated Enthalpies For Mixtures Of Propane And Propene, David B. Manley, George W. Swift
Chemical and Biochemical Engineering Faculty Research & Creative Works
No abstract provided.