Chemical Engineering, Department of
The Department of Chemical Engineering combines the study of mathematics, chemistry, physics and biology, with engineering science, design, and economics. Students at the Department learn how to design safe, efficient, environmentally-friendly, sustainable and economical processes and products.
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Recent Submissions
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Modulating the Inflammatory Response of Macrophages on Biomaterial Surfaces
The foreign body response is an inflammatory response to implanted materials and poses significant challenges for biomaterials-based medical applications, often leading to the degradation or fibrous encapsulation of an ... -
An Efficient Process for the Cu(0)-Catalyzed Controlled Radical Synthesis and Subsequent Chain Extension of Poly(Methyl Acrylate) Macroinitiator
Copper mediated polymerization is used to produce poly(methyl acrylate) with an average degree of polymerization of 10 (P(MA)10) and narrow distribution in both batch and continuous tubular reactors at ambient temperature. ... -
The biological treatment of synthetic fracking fluid in an extractive membrane bioreactor: Selective transport and biodegradation of hydrophobic and hydrophilic contaminants
(2019-06-05)The biodegradation of selected organic constituents present in hydraulic fracturing wastewater were examined in an extractive membrane bioreactor (EMB) operating with Hytrel™ 3548 tubing. Synthetic hydraulic fracturing ... -
Reversible Photoisomerization from Borepin to Boratanorcaradiene and Double Aryl Migration from Boron to Carbon
(2019-03-26)B(npy)Ar2 (npy=2-(naphthalen-1-yl)pyridine) compounds bearing various nonbulky aryl groups undergo a clean and sequential two-step photoisomerization in which two aryl substituents on boron migrate to a carbon atom of the ... -
Exfoliation of graphite and expanded graphite by melt compounding to prepare reinforced, thermally and electrically conducting polyamide composites
(2019-04-02)High performance composites based on a thermoplastic polyamide matrix containing well dispersed graphene nanoplatelets are prepared, by delaminating expanded graphite (EG) into its constituent graphene nanoplatelet (GNP) ... -
Degradation and Crystallization Studies of Branched PLA Prepared by Reactive Extrusion
This thesis proposes strategies to improve the crystallinity and mechanical properties of poly(lactic acid) (PLA) and investigates the effects of these modifications on hydrolytic degradation. The effect of long-chain ... -
Molecular Continua for Polymeric Liquids in Large-Amplitude Oscillatory Shear Flow
(2017-05)In this paper, we connect a molecular description of the rheology of a polymeric liquid to a continuum description, and then test this connection for large-amplitude oscillatory shear flow (LAOS). Specifically, for the ... -
Simple Accurate Expressions for Shear Stress in Large-Amplitude Oscillatory Shear Flow
(2017-05)Analytical solutions for shear stress in large-amplitude oscillatory shear flow (LAOS), for continuum or molecular models, often take the form of the first few terms of a power series in the shear rate amplitude. For ... -
Padé Approximant for Normal Stress Differences in Large-Amplitude Oscillatory Shear Flow
(2017-11)Analytical solutions for the normal stress differences in large-amplitude 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 ... -
Nonlinear Core Deflection in Injection Molding
(2018-02)Injection molding of thin slender parts is often complicated by core deflection. This deflection is caused by molten plastics race tracking through the slit between the core and the rigid cavity wall. The pressure of this ... -
Ethermodynamic Instability of Polymeric Liquids in Large-Amplitude Oscillatory Shear Flow from Corotational Maxwell Fluid
(2018-04)When polymeric liquids are subjected to oscillatory shear flow, if the amplitude of the shear rate is high enough, the shear stress response will become aperiodic. This has been variously attributed to fracture, common ... -
Power Series for Shear Stress of Polymeric Liquid in Large-Amplitude Oscillatory Shear Flow
(2018-04)xact solutions for shear stress in a polymeric liquid subjected to large-amplitude oscillatory shear flow (LAOS) contain many Bessel functions. For the simplest of these, for instance, the corotational Maxwell fluid, in ... -
Macromolecular Tumbling and Wobbling in Large-Amplitude Oscillatory Shear Flow
(2018-11)For a suspension of rigid dumbbells, in any simple shear flow, we recently solved for the diffusion equation for the orientation distribution function by a power series expansion in the shear rate magnitude. In this paper, ... -
Order in Oscillatory Shear Flow
(2018-12)We examine the second order orientation tensor for the simplest molecular model relevant to a polymeric liquid in large-amplitude oscillatory shear flow (LAOS), the rigid dumbbell suspension. For this we use an approximate ... -
Exact Analytical Interconversion between Durometer Hardness Scales
(2017-02)Previous work has related Young’s modulus to durometer hardness for any standardized scale. In this paper, we build on this work to solve explicitly and exactly for the hardness in any one standardized durometer hardness ... -
Power Series for Normal Stress Differences of Polymeric Liquids in Large-Amplitude Oscillator Shear Flow
(2018-04)Exact solutions for normal stress differences in polymeric liquids subjected to largeamplitude oscillatory shear flow (LAOS) contain many Bessel functions, each appearing in infinite sums. For the simplest relevant model ... -
Series Expansion for Shear Stress in Large-Amplitude Oscillatory Shear Flow From Oldroyd 8-Constant Framework
(2018-06)When polymeric liquids undergo large-amplitude oscillatory shear flow (LAOS), the shear stress responds as a Fourier series, the higher harmonics of which are caused by the fluid nonlinearity, and the first harmonic of ... -
Exact Coefficients for Rigid Dumbbell Suspensions for Steady Shear Flow Material Function Expansions
(2008-07)From kinetic molecular theory, we can attribute the elasticity of polymeric liquids to macromolecular orientation. For a suspension of rigid dumbbells, subject to a particular flow field, we must first solve the diffusion ... -
Degradation in Parallel-Disk Rheometry
(2018-08)We analyze quantitatively the oxidative degradation of a sample in a parallel-disk rheometer, as oxygen diffuses inward, radially, from the free boundary. We examine rheometer error mitigation by means of nitrogen blanketing, ... -
Orientation Distribution Function Pattern for Rigid Dumbell Suspensions In Any Simply Shear Flow
(2018-09)For rigid dumbbells suspended in a Newtonian solvent, the viscoelastic response depends exclusively on the dynamics of dumbbell orientation. The orientation distribution function ψ (θ ,φ ,t) represents the probability of ...
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