Browsing Chemical Engineering, Department of by Title
Now showing items 268287 of 383

Padé Approximant for Normal Stress Differences in LargeAmplitude Oscillatory Shear Flow
(201711)Analytical solutions for the normal stress differences in largeamplitude oscillatory shear flow (LAOS), for continuum or molecular models, normally take the form of the first few terms of a series expansion in the shear ... 
Padé Approximants for LargeAmplitude Oscillatory Shear Flow
(20150317)Analytical solutions for either the shear stress or the normal stress differences in largeamplitude oscillatory shear flow, both for continuum or molecular models, often take the form of the first few terms of a power ... 
Parameter estimation in nonlinear continuoustime dynamic models with modelling errors and process disturbances
(20080625)Modelbased control and process optimization technologies are becoming more commonly used by chemical engineers. These algorithms rely on fundamental or empirical models that are frequently described by systems of differential ... 
Parameter Estimation Techniques for Nonlinear Dynamic Models with Limited Data, Process Disturbances and Modeling Errors
(20131223)In this thesis appropriate statistical methods to overcome two types of problems that occur during parameter estimation in chemical engineering systems are studied. The first problem is having too many parameters to estimate ... 
Parameter identifiability of biochemical reaction networks in systems biology
(20080814)In systems biology, models often contain a large number of unknown or only roughly known parameters that must be estimated through the fitting of data. This work examines the question of whether or not these parameters ... 
Parameter Inference and Estimability Analysis for Nonlinear MultiResponse Systems by Means of Profiling
(20141001)Determining the inference bounds for parameter estimates in multiresponse models is a challenge for research and industry since potential codependencies among responses add to the complexity of the problem. Statistical ... 
Peroxide Curable Butyl Rubber Derivatives
(20120706)Isobutylenerich elastomers bearing functional groups that engage Narylmaleimides in CH bond addition and/or alternating copolymerization are described. While inactive to crosslinking when treated at high temperature ... 
PeroxideCurable Macromonomer Derivatives of IsobutyleneRich Elastomers
(20140130)Macromonomers bearing oligomerizable C=C functionality have been prepared by the nucleophilic displacement of allylic bromide functionality on brominated poly(isobutylenecoisoprene) (BIIR). Whereas commercial grades of ... 
Peroxideinitiated Modification of Polylactic acid (PLA) and Poly(3hydroxyalkanoates) (PHAs) in the Presence of Allylic and Acrylic Coagents
This thesis investigates the fundamentals of modification of polylactic acid (PLA) and poly(3hydroxyalkanoates) (PHAs), focusing on improving the understanding of the reactivity of these ... 
Plastic Pipe Solidification: Exact Solutions in Cylindrical Coordinates
(201512)For polymer melt solidification in plastic pipe extrusion, we perform an energy balance on the pipe extrudate in cylindrical coordinates to arrive at exact solutions for the temperature, and for the solidification rate. ... 
Polylactic acid macromonomer radical propagation kinetics and degradation behaviour
(Royal Society of Chemistry (RSC), 20170801)Polylactic acid ethyl ester methacrylate (PLANEMA) macromonomers are synthesized with N = 1, 5, 7, and 9 average number of polyester units. While propagation rate coefficients (kp) determined by pulsed laser polymerization ... 
Polymer Branching and First Normal Stress Differences in SmallAmplitude Oscillatory Shear Flow
(201911)General rigid beadrod theory [Hassager, J Chem Phys, 60, 4001 (1974)] explains polymer viscoelasticity from macromolecular orientation. By means of general rigid beadrod theory, we relate the normal stress differences ... 
Polymer Fluid Dynamics: Continuum and Molecular Approaches
(20160620)To solve problems in polymer fluid dynamics, one needs the equation of continuity, motion, and energy. The last two equations contain the stress tensor and the heatflux vector for the material. There are two ways to ... 
Polymer Orientation Contributions in LargeAmplitude Oscillatory Shear Flow
(201701)Previously, we used a dilute suspension of rigid dumbbells as a model for the dynamics for polymeric liquids in largeamplitude oscillatory shear (LAOS) flow. We then use dumbbell orientation to explain fluid elasticity. ... 
Polymer Process Partitioning: Extruding Plastic Pipe
(20160914)When plastic pipe is solidified, it proceeds through a long cooling chamber. Inside this chamber, inside the hollow extrudate, the plastic is molten, and this inner surface solidifies last. Sag, the flow due to the ... 
Polymer Processing Partitioning Approach: Extruding Plastic Pipe
(201601)The proposed thesis research aims at deepening our understanding of the flow of polymer melts through eccentric plastic pipe extrusion dies. Specifically, the proposed thesis research will explore how viscoelasticity affects ... 
Polymeric Ionic Liquid Compositions for InSitu Product Removal Bioreactor Applications
Although the biosynthesis of nbutanol and succinic acid can afford renewable fuels, solvents, and chemical intermediates, these bioprocesses suffer from the cytotoxicity of their end products, leading to reduced production ... 
Polymeric Liquid Behavior in Oscillatory Shear Flow
One of the great challenges in chemical engineering is to predict physical properties from molecular structure. Predicting transport properties presents special challenges, especially for macromolecular structures. This ... 
Polymeric Substances and Microbial Communities in Source Water and in Biofiltration Processes in the Treatment for Drinking Water
(20150204)The application of membrane filtration for drinking water treatment is limited by membrane fouling due to the accumulation of biopolymers. Biofiltration may be an effective pretreatment approach to reduce the biopolymers, ... 
Polyolefin Formulations for Improved Foaming: Effects of Molecular Structure and Material Properties
(20130130)The morphology and mechanical properties of foams made out of ethyleneαolefin copolymers (EC) having wellcharacterized rheological properties were investigated. The polymers differed in the amount of comonomer contained, ...