Date of Award
5-2024
Degree Type
Dissertation
Degree Name
Doctor of Philosophy (PhD)
School
Polymer Science and Engineering
Committee Chair
Yoan C. Simon
Committee Chair School
Polymer Science and Engineering
Committee Member 2
Tristan D. Clemons
Committee Member 2 School
Polymer Science and Engineering
Committee Member 3
Sarah E. Morgan
Committee Member 3 School
Polymer Science and Engineering
Committee Member 4
Sergei I. Nazarenko
Committee Member 4 School
Polymer Science and Engineering
Committee Member 5
Derek L. Patton
Committee Member 5 School
Polymer Science and Engineering
Abstract
Dynamically bonded polymers are a class of materials which have garnered significant interest in recent years for their unique properties and potential applications. These polymers contain exchangeable linkages, thereby allowing for the long-range reorganization of polymer architectures within a given material. Extensive work has been done to develop novel strategies for incorporating covalent and non-covalent dynamic linkages into polymeric materials. This dissertation examines both dynamic covalent and non-covalently bound polymers, with a focus on understanding the emergent material properties that arise through dynamic exchange. A general overview of dynamic chemistries and their applications to polymer science is given in Chapter I. Chapter II discusses the design and synthesis of morpholin-2-one functionalized poly(norbornenes) and their application as reactive handles for single and double polymer modification. We provide in-depth kinetics studies to demonstrate the selective reactivity of morpholin-2-one with primary aliphatic amines, and further show that the latent alcohol group can be used as a second reactive site to for double modification of polymer chains. Finally, we present a one-pot approach to synthesize doubly grafted polymer architectures from monomeric starting materials. Chapter III focuses on the use of imidazolium sulfonate zwitterions as a non-covalent binding motif for supramolecular polymer networks. Herein, we report a trifunctional zwitterion, which form low molecular weight supramolecular glasses due to strong dipole-dipole interactions between zwitterionic dipoles. In chapter IV, we present photopolymerizable diketoenamine vitrimers utilizing bis-hydroxyamine crosslinkers as a model system to explore the role of crosslinker choice in controlling the topology- iii freezing temperature of triketone-based vitrimers. Finally, Chapter V provides a concise summary of our work and offers some future directions to pursue.
ORCID ID
0000-0002-7333-9182
Copyright
Isaiah Timothy Dishner, 2024
Recommended Citation
Dishner, Isaiah T., "Emergent Properties of Dynamically Bonded Polymers" (2024). Dissertations. 2255.
https://aquila.usm.edu/dissertations/2255