Browsing University of Waterloo by Subject "polymer"
Now showing items 1-20 of 21
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An alternative derivation of orbital-free density functional theory
(AIP, 2019-05-28)Polymer self-consistent field theory techniques are used to derive quantum density functional theory without the use of the theorems of density functional theory. Instead, a free energy is obtained from a partition function ... -
Antimicrobial Cellulose Nanocrystals Containing Quaternary Ammonium Polymers Prepared via Atom Transfer Radical Polymerization
(University of Waterloo, 2020-09-09)Nanomaterials have been widely used as antimicrobial agents for their high efficiency. However, the lack of recovery techniques and toxicity has raised concerns for the use of these materials. Cellulose nanocrystals (CNCs), ... -
Bidirectional mapping between self-consistent field theory and molecular dynamics
(AIP Publishing, 2007-10-08)A bidirectional mapping scheme that bridges particle-based and field-based descriptions for polymers is presented. Initial application is made to immiscible homopolymer blends. The forward mapping (upscaling) approach ... -
Characterization of Polysaccharides in Starch using Fluorescence Techniques
(University of Waterloo, 2020-09-25)Amylose and amylopectin, which are the two main constituents of starch, were characterized using the pyrene excimer fluorescence (PEF) technique. First, an amylose sample was randomly labeled with the dye pyrene to yield ... -
Characterization of the Behaviour of Solution-Responsive Polymers by Fluorescence
(University of Waterloo, 2014-04-17)Two families of amphiphilic polymers were characterized with respect to their ability to respond to changing solution conditions using steady-state and time-resolved fluorescence. Firstly, a series of 5 sequential amphiphilic ... -
Characterization of the Self-Assembly of Pyrene-Labelled Macromolecules in Water
(University of Waterloo, 2010-05-19)The self-assembly of several pyrene-labelled amphiphilic macromolecules in water was characterized by fluorescence. Information on their self-assembly was obtained by monitoring the level of pyrene aggregation in solution. ... -
Characterization of Various Pyrene-Labelled Macromolecules in Solution by Fluorescence
(University of Waterloo, 2010-11-04)Time-resolved fluorescence was applied to linear and branched pyrene-labelled macromolecules to study their internal dynamics. The linear macromolecules consisted of two series of pyrene-labelled poly(N-isopropylacrylamide)s ... -
Chemical Modification of Poly-α-1,3-Glucan
(University of Waterloo, 2022-05-09)Sustainability is becoming a primary consideration in the development of new materials. Specifically, renewability and biodegradability are desirable properties for materials in a variety of applications, including packaging ... -
Development of Novel Π-conjugated Polymer Semiconductors for Organic Solar Cells
(University of Waterloo, 2018-12-20)Bulk heterojunction polymer solar cell (PSC) is a promising photovoltaic technology for clean and renewable energy sources due to its superior advantages such as mechanical flexibility, light weight, low-cost fabrication, ... -
Development, Analysis and Testing of Innovative Mechanical Prestressing Anchors for CFRP Plates for Structural Rehabilitation and Retrofitting
(University of Waterloo, 2017-01-18)This thesis presents the development, analysis and experimental investigation of three innovative, easy-to-install, low cost, epoxy-free, mechanical, friction-based, compact, high-strength, prestressing anchors for carbon ... -
Effects of Corona Discharges on Silicone Rubber Samples under Severe Environmental Conditions
(University of Waterloo, 2021-01-13)Silicone rubber (SiR) material has been utilized as a replacement to ceramic insulators. The impetus for increasing SiR applications in outdoor insulators is its unique hydrophobicity. However, SiR insulators are subjected ... -
Hemi-Isoindigo Polymers and Oligomers for Temperature Sensing Applications
(University of Waterloo, 2022-02-09)Organic semiconductors are extensively used for electronic applications such as OFETs and OPVs due to their low-cost and well-defined manufacturing processes. This includes vacuum deposition, solution processing, and ... -
Interactions between drag reducing polymers and surfactants
(University of Waterloo, 2009-09-30)Drag reduction in turbulent pipe flow using polymeric and surfactant additives is well known. Although extensive research work has been carried out on the drag reduction behavior of polymers and surfactants in isolation, ... -
Investigations on Drag Reduction by Interactions between Polymer and Surfactant and Polymer and Polymer
(University of Waterloo, 2015-12-22)A large amount of studies have been carried out on pipeline flow with several kinds of drag reducing agents, especially polymers and surfactants. Drag reducing agents, by definition, are additives which help suppress or ... -
Monotonic and Fatigue Performance of RC Beams Strengthened with Externally Post-Tensioned CFRP Tendons
(University of Waterloo, 2007-05-04)External post-tensioning is an attractive technique for strengthening reinforced concrete structures because of its ability to actively control stresses and deflections, speed of installation, minimum interruption for the ... -
An off-lattice derivation and thermodynamic consistency consideration for the Sanchez-Lacombe equation of state
(University of Waterloo, 2017-11-09)The application of the Sanchez-Lacombe equation of state (SL-EOS) to homogeneous polymeric mixtures is requisite for the application of some types of Self-Consistent Field Theory (SCFT) to inhomogeneous mixtures. It has ... -
Preparation and Characterization of Polymer TiO<sub>2</sub> Nanocomposites via <em>In-situ</em> Polymerization
(University of Waterloo, 2006)Polymer nanocomposites are already a part of many important of worldwide businesses: automotive (molded part in cars), electronics and electrical engineering, household products, packaging industry, aircraft interiors, ... -
Reduction of polymer surface tension by crystallized polymer nanoparticles
(AIP Publishing, 2010-10-14)Self-consistent field theory is applied to investigate the effects of crystallized polymer nanoparticles on polymer surface tension. It is predicted that the nanoparticles locate preferentially at the polymer surface and ... -
Removal of Bromophenols from Wastewater by Sorption
(University of Waterloo, 2018-09-20)Poly(ether-block-amide) copolymer (PEBA) was used as an adsorbent for sorptive removal of bromophenols, particularly 4-bromophenol (BP), 2,6-dibromophenol (DBP), and 2,4,6-tribromophenol (TBP) from wastewater. Batch sorption ... -
Supercritical Fluid Assisted Recovery of Organometallic Catalysts from Polymers
(University of Waterloo, 2012-05-18)The recovery of organometallic catalysts from polymer matrices is of great importance in promoting the application of homogeneous catalysts in industry. Such a green recovery technique will not only popularize the techniques ...