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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 22 for “"bottlebrush polymers"”.
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Synthesis and Grafting To of Biomimetic Bottlebrush Polymers
<p>Specifically-adsorbed bottlebrush coatings are found in nature as brush-like glycoproteins that decorate biointerfaces and provide anti-fouling, lubrication, or wear-protection. These molecules contain a surface-adhesive headgroup to anchor macromolecules to a target surface and a bottlebrush …
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Bottlebrush Polymers: A Pathway to Engineering Surfaces and Interfaces
Bottlebrush polymers are macromolecules with a linear backbone and densely-grafted polymeric side-chains. Steric repulsion between the side chains forces the backbone to extend, leading to a rod or wormlike conformation. Therefore, bottlebrush polymers resemble both comb polymers and …
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Advancements in branched bottlebrush polymers for responsive, targeted imaging
… in vivo. Thus, we have developed branched bottlebrush copolymers that display compensatory fluorescence response to nitroxide reduction that enables correlation of MRI contrast, fluorescence intensity, and spin concentration in tissues. These polymers were synthesized by ring-opening …
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Synthesis of Bottlebrush Polymers Using the Grafting-Through and Transfer-To Methods
Bottlebrush polymers are interesting topologies that have become increasingly relevant in various applications including rheology modifiers, super-soft elastomers, photonic crystals, anti-fouling coatings, the in vivo delivery of therapeutic agents, and as promising substrates in lithographic …
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Investigating the fundamentals of ring-opening metathesis polymerization to synthesize large, well-defined, bottlebrush polymers
… To achieve complex architectures, specifically bottlebrush polymers, using ROMP, attaining the highest degree of living character is essential. As the molecular weight of the side chain or backbone increases, the "livingness" of the polymerization suffers due to premature catalyst degradation. …
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Synthesis and Characterization of Complex Polymer Topologies using Ring-Opening Metathesis Polymerization
Bottlebrush polymers are intriguing topologies that have become more significant in various applications, including drug delivery, elastomers, photonic crystals, anti-fouling coatings, nanoporous materials, and electronic and transport substrates. Polymeric side chains are tightly grafted to a …
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Bottlebrush and related polymer architectures for biomedical applications
Chapter 1: Introduction to Bottlebrush Polymers as Carrier Platforms for Drug Delivery Biomedical Applications A brief intro to the current state of nanotechnology in drug delivery applications is provided, including the common myths and facts, design considerations, as well as important challenges …
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Sustainable Polymers Through Creative Design
… for developing renewable and degradable polymers with minimal energy input as well as new methods to blend legacy polyolefins with renewable polymers. The first half of the dissertation focuses on synthesizing polymers using light while the second section focuses on combining traditional …
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Designing Microporous Polymers for Separations
… in ring-opening metathesis polymerization (ROMP) polymers with pore-generating side chains. Macromonomers with four discrete monodispersities are separated and polymerized to produce bottlebrush polymers with monodisperse side chains. Each bottlebrush polymer is fabricated into a free-standing …
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Efficient Synthetic Strategies for Discrete Macromolecules: Enabling Exploration of Structure-Property Relationships in Biological and Materials Applications
… Compared to traditionally synthesized disperse polymers, these defined molecular features of discrete polymers offer an opportunity to explore the structure-property relations of designed polymeric systems under different applications, such as drug delivery systems and elastic materials. In this …
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Rational design of polymer networks and bottlebrush block copolymers
Chapter 1: Introduction to Polymer Networks and Bottlebrush Block Copolymers We introduce polymer networks and the contribution of this author's thesis in the context of new polymer gel design and analysis of topological defects. We also introduce block copolymers and the key architectural …
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Ru-mediated ring-opening metathesis polymerization for the synthesis of complex polymer architectures
… of complex polymer architectures (e.g., bottlebrush polymers, star polymers, and (multi)block copolymers, among others). However, compared to other living polymerizations, quantitative studies on the kinetic factors affecting living characteristics in ROMP are lacking. This work describes …
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Engineering approaches to control polymer architecture
The synthesis of well-defined polymers offers great potential for improving society as there is nearly an infinite spectrum of tailored materials that can be made. Traditionally, the polymer community has mainly focused on purely chemistry driven methods for controlling polymer molecular weight, …
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Design and Synthesis of Stimuli-Responsive Polymers with Programmable Cleavability
Polymers comprise a large portion of modern-day materials, from everyday plastics that we can hold and use, to nanomaterials imperceptible to the naked eye. Applying synthetic chemistry to impart structural changes to established polymers offers a promising path to introduce novel functionalities …
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Molecular and Biofunctional Modification of Conformal POEGMA Bottlebrush Coatings and Applications Toward In Vitro Diagnostics
… required to complete the assay. Synthetic “bottlebrush” polymers have garnered considerable attention as molecularly defined and tunable biointerfacial coatings for a diverse set of biomedical applications; in particular, their bio-inertness, ability to eliminate nonspecific binding events …
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Functional Polymer Materials: From Iptycenes to Ring-Opening Polymerizations
… a variety of applications. Amine-functionalized polymers are used in graphene oxide composite membranes towards aqueous filtration. Guanidinium-functionalized polymers are explored for impedance-based gas sensing. Pyrazolium-functionalized polymers are fabricated into anion-exchange membranes. In …
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Fundamental and applied studies of polymeric photonic crystals: the role of polymer architecture and 3D printing
Block copolymers (BCP) provide a bottom-up, economical approach to synthesizing polymeric photonic crystals (PC) through the process of self-assembly. Photonic crystals (PC) are defined as periodic, dielectric nanostructures able to reflect certain wavelengths of light within a photonic band gap. …
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Design of Cleavable Monomers and Cross-Linkers for the Synthesis of Degradable Polymer Architectures
… introduction of labile bonds to already known polymers offers, thus, a much simpler approach for the manufacture of degradable materials. Here, we report the design of cleavable monomers and cross-linkers for the synthesis of degradable materials with different polymer architectures. The first …
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Advancing thermal field-flow fractionation for industrial polymer characterization
… its open channel design and ability to separate polymers and colloids. The applied field in an FFF technique determines the physiochemical properties by which the separation occurs. A well-established theory relates retention time to a retention parameter that is defined by the interaction …
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Synthesis, Properties, and Biology of Advanced H2S-Releasing Materials
… chemistry was utilized to prepare H2S-releasing polymers. Copolymers prepared using RAFT polymerization could be functionalized with SATOs with conversions > 99%, and these polymers released H2S on a similar timescale to our small molecule donors, confirming the viability of SATO formation as a …
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