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Articles 31 - 34 of 34
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Biomimetic Adhesive Thiol-Ene Films For Improved Adhesion, Laken L. Kendrick
Biomimetic Adhesive Thiol-Ene Films For Improved Adhesion, Laken L. Kendrick
Honors Theses
Current dental restoration materials fall short in adhesion and often pull away from the surface of the tooth upon curing. This project seeks to design polymers that can adhere to wet, heterogeneous surfaces as potential materials for dental restoration applications. The goal of this project is to mimic the structure and adhesive properties of natural adhesives containing 3,4-dihydroxyphenyl-L-alanine (DOPA). We will synthesize mono- and di-functional DOPA derivatives with catechol functionality and investigate their adhesion compared to their non-catechol-containing alternative through incorporation into a model thiol-ene photopolymerization. Functional group conversion, real time kinetics, and adhesion data will be used to analyze …
Analysis Of The Mechanical Properties Of Dgebf/4,4’-Dds Thermoset Systems As A Function Of Cure Rate, Chase B. Thompson
Analysis Of The Mechanical Properties Of Dgebf/4,4’-Dds Thermoset Systems As A Function Of Cure Rate, Chase B. Thompson
Honors Theses
The relationship between macroscopic mechanical and thermal properties and ramp rate during cure of epoxy-amine systems consisting of the epoxide resin digylcidyl ether of bisphenol F (DGEBF, provided Hexion specialty chemicals) and 4,4-diaminodiphenyl sulfone (4,4-DDS, provided by Atul Sulpho) were probed using Dynamic Mechanical Analysis (DMA), Positron Annihilation Lifetime Spectroscopy (PALS), and compression testing. These systems were cured in a programmable oven; the samples were heated from 35°C to 180°C at ramp rates of 0.5, 1.0, 1.5, 2.0, 2.5, 5.0, 10, and 15°C/min. Even as the ramp rates during the cure of these materials was changed, there was very little …
Effects Of Varying The Cure Profiles Of An Epoxy-Amine System, Patrick W. Hollingsworth
Effects Of Varying The Cure Profiles Of An Epoxy-Amine System, Patrick W. Hollingsworth
Honors Theses
The cure of an epoxy prepolymer with an amine hardener induces stress in thermosetting systems. The extent of residual stresses in the cured epoxy-amine thermosets are dependent on several factors; one of which is the cure profile utilized. The effect of cure profile on cure induced stresses of an epoxy-amine thermoset was examined in the current study. A difunctional epoxide based on diglycidyl ether of bisphenol-A (DGEBA) and a tetrafunctional amine curative were used to conduct this study. Two cure profiles were selected to prepare samples of varying degrees of stress in the cured thermosets. The first was constant heating …
Raft Polymerization Of Sulfonamide-Containing Methacrylamides, Michael B. Sims
Raft Polymerization Of Sulfonamide-Containing Methacrylamides, Michael B. Sims
Honors Theses
Targeted delivery of cancer therapeutics offers an exciting new opportunity for utilization of controlled polymerization techniques. However, a major obstacle in achieving the desired therapeutic effect is facilitating endosomal release of active agents following endocytosis. Peptides and pH-responsive polymers have been utilized as a means of triggering endosomal release via phase transition-induced membrane disruption. Unfortunately, the fidelity by which the pKa of these polymers/peptides can be varied is limited, such that it reduces their versatility in altering the phase transition point to best match the endosomal pH of a particular cell-type. Herein, we report the controlled polymerization of library of …