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Articles 1 - 30 of 74
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Continuous Interfacial Polycondensation Of Nylon 6-10, Sumer Raj Hundia
Continuous Interfacial Polycondensation Of Nylon 6-10, Sumer Raj Hundia
Theses
Nylon 6-10 has been prepared by continuous interfacial polycondensation hexamethylenedlamine and sebacoyl chloride in a stirred system. The effect of monomer concentration and stirring on the intrinsic viscosity of the polyamide 6-10 solution in m-cresol was measured.
As stirring (RPM) and monomer increased the intrinsic and the polymer yield through a maximum. Diffusion coefficients (DAB) for hexamethylenedlamine were for hexamethylenedlamine were and were used for the calculations of jD factors and K/DAB ratios. A relationship and jD factors was established by a correlation curve.
Development Of An Apparatus To Obtain Temperature Profiles Of Molten Flowing Polymers, Ismail Kemal Saltuk
Development Of An Apparatus To Obtain Temperature Profiles Of Molten Flowing Polymers, Ismail Kemal Saltuk
Theses
The object of this investigation is to develop and test an apparatus to predict temperature profiles of polymer melts in laminar flow in a heat exchanger, with non-isothermal wall conditions.
A commercial polyethylene melt is pumped at various flow rates through a smooth 0.957 in. I.D. pipe. The entrance temperature of polymer is maintained uniform.
Radially distributed six thermocouples (0.062 in. 0.D.) are placed at 2.5 ft. intervals from the entrance of heat exchanger. Immersion of these probes parallel to the flow direction, reduced the errors due to the conduction of heat from the tube wall to the thermocouple stems. …
Unsteady State Heat Transfer In A Composite Medium Exposed To Radiant Heat Energy, Ripujit Mackar
Unsteady State Heat Transfer In A Composite Medium Exposed To Radiant Heat Energy, Ripujit Mackar
Theses
Transient one dimensional heat transfer in a composite medium of two materials exposed to radiant heat flux has been investigated. The end faces of the composite were considered to be losing heat energy by natural convection and radiation. The principle variables studied were the temperature at steady state and the time required to attain the steady state with and without the contribution of loss by radiation. It was observed that neglecting the loss of energy by radiation from the face receiving the radiant heat flux introduced an error in the absolute steady state temperature of that face as high as …
Ceramic Planters That Function As Space Dividers, Richard Zimmer
The Investigation Of Sculptural Forms, John Frisenda
Familia, Maria Emerson
The Stunting Of Creative And Mental Growth; Or, The Evolution And Pollution Of Ideas, Nelson Dodson
The Stunting Of Creative And Mental Growth; Or, The Evolution And Pollution Of Ideas, Nelson Dodson
Theses
None provided.
Figurative Painting And The Photograph, Thomas Insalaco
Personal Imagery And Paint, Stuart Green
Flat Monumentality, Theodora Cichy
An Individual Analysis Of The Photography-Painting Relationship, Lawrence White
An Individual Analysis Of The Photography-Painting Relationship, Lawrence White
Theses
None provided.
Photo Extensions By A Painter, Catherin Berger
Determination And Application Of Winstein-Grunwald M And Y Values In Bridged Polycyclic Systems, Rosemary Leyden
Determination And Application Of Winstein-Grunwald M And Y Values In Bridged Polycyclic Systems, Rosemary Leyden
Theses
The rates of solvolysis of 3-nortricyclyl p-bromobenzenesulfonate (nortricyclyl brosylate) have been determined (at 25.0) in the solvents acetic acid, methanol, and acetic acid and methanol with various small amounts of added water. First order rate constants were obtained by u.v. absorbance, conductometric and titrimetric techniques. All rate constants obtained, with the exception of the titrimetric data, were fairly reproducible and agreed with the previously reported data (where available). Numerical values of m from the Winstein equation: log k/k = mY were calculated from experimental data for solvolysis reactions of nortricyclyl brosylate in each of the solvent sets. These m values …
Single Element Fiber Forms, Carolyn Thomas
Photographic Dependence/Independence, Patricia Porcynaluk
Natural Forms In Abstract Painting, Teresa Patti
Ceramic Tea Service, Patricia K. Swyler
The Transferability Of Force Constants Among Olefins, John Martin Comerford
The Transferability Of Force Constants Among Olefins, John Martin Comerford
Theses
A normal coordinate analysis of the in-plane vibrations of ethylene was performed using a modified valence force field, a modified Urey-Bradley force field and a hybrid orbital force field. The B2u species of isobutene was also analyzed. An attempt was made to transfer force constants from ethylene and thereby solve the A1 species of isobutene, but a solution could not be obtained. This suggests that simple transference of force constants is not feasable in this case.
The potential energy distributions obtained for ethylene are discussed. The normal coordinates calculated in this work are appended.
The Absorption Of Hydrogen Chloride From Dilute Air Mixtures, Edgar L. Demarest
The Absorption Of Hydrogen Chloride From Dilute Air Mixtures, Edgar L. Demarest
Theses
A study was made of the absorption of hydrogen chloride from air mixtures containing from 1 to 40 mgm. HCl/liter (1000 to 40000 mgm./m.3), using a.4" diameter tower packed with 2" Intalox saddles, irrigated with water or with sodium hydroxide solutions of 0.3% to 3.8% concen?tration. Gas flow rates of 177 to 752 lbs./(hr.)(ft.2) were investigated at three liquid rates: 2960 ; 4260, and 5700 lbs./(hr/)(ft.2). All data were collected below the flooding point.
Correlations of the height of a transfer unit with the superficial gas velocity were prepared for water and for sodium …
Aiir Pollution Emissions From Turbine Powered Aircraft, Raymond Arthur Filippini
Aiir Pollution Emissions From Turbine Powered Aircraft, Raymond Arthur Filippini
Theses
The major pollutants that are emitted by jet aircraft include: particulate matter (soot), carbon monoxide, aldehydes, hydrocarbons, and nitrogen oxides. The first of the pollutants, particulate matter (smoke), constitutes not only a visual nuisance but is also a potential health problem. The rest, which are not visible, are irritants and in high enough concentrations can be toxic.
Since pollutants emitted by jet aircraft are of the same type as those given off by a car, a direct comparison is possible. In one landing take off cycle (LTO), a four engine jet aircraft emits the same amount of particulate matter as …
Phosphate Removal From Sewage Using A Combination Of Ferric Chloride And A Polymeric Flocculant, Ravindra C. Patel
Phosphate Removal From Sewage Using A Combination Of Ferric Chloride And A Polymeric Flocculant, Ravindra C. Patel
Theses
The present work is concerned with a newer technique and approach to the problem of phosphate removal from waste water. This includes the removal of phosphate from the sample of activated sludge, i.e., a sample from the aeration tank of the secondary sewage treatment. The phosphate is removed by using ferric chloride as a precipitating agent and a cationic polyelectrolyte (P.E.) as a flocculating agent. Results of this study showed that: (a) P.E. addition gives a significant improvement in phosphate removal over that obtained by ferric chloride alone. In some cases the phosphate removal increased from 92 to 96.5 per …
Combined Feedforward-Feedback Control Of A Fluidized-Bed Reactor, Reginald Eugene Mitchell
Combined Feedforward-Feedback Control Of A Fluidized-Bed Reactor, Reginald Eugene Mitchell
Theses
Feedforward control, feedback control, and combined feedforward-feedback control were studied on an analog computer to evaluate their effectiveness in controlling a fluidized-bed reactor used for the decomposition of cumene. Proportional, proportional-integral, proportional-derivative, and proportional-integral-derivative modes of control were investigated. Step changes in set-point and load were used as disturbances. The Ziegler-Nichols method and the process reaction curve method of Cohen and Coon were compared in determining values of KC, Ti, and Td which gave optimum control of the fluidized-bed reactor.
Control equation were obtained from the block diagrams of the systems and solved on an EAI TR-20 Analog Computer.
It …
Correlation And Prediction Of Diffussion Coefficients In Binary Gas Systems, Raymond Gerald Bailey
Correlation And Prediction Of Diffussion Coefficients In Binary Gas Systems, Raymond Gerald Bailey
Theses
A correlation was developed for estimating binary gas diffusion coefficients by the reference substance method, in this case using the viscosity of air and subsequently its corresponding temperature. The derivation was made by the linear least square analysis of 65 different binary systems comprising 161 separate data points at temperatures ranging from 193°K. to 1200°K. At any given temperature only the critical molal volume and the molecular weights of the two gases of interest are required to calculate the diffusion coefficient. The correlation based on the viscosity of air had an average error of 7.67%. The correlation using temperature had …
A Computer Program For The Design Of Packed Extraction Columns, George P. Gaccione
A Computer Program For The Design Of Packed Extraction Columns, George P. Gaccione
Theses
A computer program for the design of packed extraction columns has been developed. This program can operate with a minimum of data of the type that can easily be determined or estimated. The program can be used to investigate design alternates during the preparation of project cost estimates and for the final design of extraction columns.
Viscoelastic Properties Of Polymer Melts, Wu-Shiong Lee
Viscoelastic Properties Of Polymer Melts, Wu-Shiong Lee
Theses
Thirteen samples of molten polymers were used to test Spriggs and Careau Models. Two empirical equations, one for apparent viscosity and the other which is new, for primary normal stress difference, were checked with these samples also.
In order to test the models, material functions were sought for some specific flow patterns under which the experimental data were collected, and then these functions were compared with data.
Careau Model was found to be better than Spriggs Model in representing molten polymer properties but still yield large deviations. Two empirical equations fitted data quite well and were expected to be useful …
A Modified Redlich-Kwong Equation For Nonpolar And Slightly Polar Gases, David G. Skamenca
A Modified Redlich-Kwong Equation For Nonpolar And Slightly Polar Gases, David G. Skamenca
Theses
The PVT prediction capability of the Redlich-Kwong equation is substantially improved through the use of a generalized correlation based on the acentric factor. No experimental data is required to obtain the improved constants. Only the acentric factor and the critical properties of the pure gas are needed. The correlation of improved constants is limited to non-polar and slightly polar pure gases and mixtures in the supercritical temperature range.
The correlation applies to a reduced temperature range 1.00 le; TR le; 1.60 and a reduced pressure range of 0.030 le; PR le; 3.00. The correlation reduces deviations by as …
The Relation Of Heat Transfer To Power Consumption Of Liquids In Turbulent Flow, John D. Bien
The Relation Of Heat Transfer To Power Consumption Of Liquids In Turbulent Flow, John D. Bien
Theses
The relationship between the heat transfer ability and the power input requirement of liquid coolants in a turbulent heat transfer condition was investigated. A correlation in terms of the liquid physical properties and the required volumetric flow was proposed and the use of this correlation in selection of liquids as coolant was discussed. The optimum condition for a high heat transfer/power input ratio was also discussed.
Spatial Interactions In Monobath Development, Gary Mcsweeney
Spatial Interactions In Monobath Development, Gary Mcsweeney
Theses
The sensitometric effects of varying developing agent concentration, fixing agent concentration, and pH in a monobath developer were studied with Kodak Tri-X Pan film. Three variables (gamma, base plus fog, and a shoulder density) were studied under varying levels of each of the factors. A factorial experiment was run and an analysis of variance (ANOVA) was used to determine whether or not each of the main factors and the two-factor interactions were significant. The higher order interactions were used as a measure of experimental error for the analysis. In the range of the factors being investigated, it was found that: …
Problems In Perception: The Role Of Art In Special Education, Patricia Koch
Problems In Perception: The Role Of Art In Special Education, Patricia Koch
Theses
None provided.
The Pilgrimage Of Geoffrey Chaucer's Canterbury Tales, Winifred Bixler
The Pilgrimage Of Geoffrey Chaucer's Canterbury Tales, Winifred Bixler
Theses
None provided.