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Full-Text Articles in Polymer Chemistry
The Synthesis And Application Of Polyglyoxylamides, Quinton Ea Sirianni
The Synthesis And Application Of Polyglyoxylamides, Quinton Ea Sirianni
Electronic Thesis and Dissertation Repository
Self-immolative polymers (SIPs) are a subset of degradable polymers that can be triggered to fully depolymerize with a single stimulus event. This amplifying behaviour makes them ideal for real-world applications including sensors, recyclable plastics, and drug delivery vehicles. Polyglyoxylates (PGs) are a class of SIPs that can be synthesized in a one-pot reaction and designed to respond to different stimuli including light, heat, reduction, and oxidation. However, with the exception of poly(ethyl glyoxylate) (PEtG), the various glyoxylate monomers must be prepared and purified before polymerization, which can be difficult. Furthermore, PGs typically possess properties such as water-insolubility and low glass …
Stimuli-Responsive Polyelectrolytes: Thermosensitive Zwitterionic Polymers And Charged Shape-Changing Star Molecular Bottlebrushes, Evan M. Lewoczko
Stimuli-Responsive Polyelectrolytes: Thermosensitive Zwitterionic Polymers And Charged Shape-Changing Star Molecular Bottlebrushes, Evan M. Lewoczko
Doctoral Dissertations
This dissertation work investigated two classes of stimuli-responsive polyelectrolytes: thermosensitive zwitterionic poly(sulfobetaine methacrylate)s (PSBMAs) and charged shape-changing star molecular bottlebrushes (SMBs). While zwitterionic polymers are explored for numerous applications, their structure-solution behavior relationship was poorly understood. The first part of this dissertation focused on the effects of N-substituents of PSBMAs on their behavior in water. A series of PSBMAs were synthesized, with systematically changed N-substituents, including symmetric N-n-alkyl substituents of various lengths and asymmetric N-substituents comprising one methyl and either one cyclohexyl, phenyl or 2-hydroxyethyl group. The behavior of PSBMAs with symmetric N-substituents …
Designing Stimuli-Responsive Nanocomposites To Investigate Interface Dynamics, Huyen Vu
Designing Stimuli-Responsive Nanocomposites To Investigate Interface Dynamics, Huyen Vu
Doctoral Dissertations
Inspired by nature, this research focuses on designing multifunctional renewable nanocomposites with high toughness and stimuli-responsiveness. In recent years, cellulose nanocrystals (CNCs) have been explored due to their abundance, renewable resource, and unique mechanical strength and structural coloration. CNCs naturally self-assemble into the helicoidal (Bouligand) structure that effectively endure high impacts but is brittle without an attendant soft phase. A thermoresponsive polymer, poly(diethylene glycol methyl ether methacrylate) (PMEO2MA), was incorporated into CNCs via evaporation-induced self-assembly to improve toughness of the resulting nanocomposites and to study responses in polymer dynamics under varying temperature and humidity conditions. To study microscopic …