Global ETD Search
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 13 of 13 for “"post-polymerization functionalization"”.
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Tailored Chain Sequences of Brominated Syndiotactic Polystyrene Copolymers via Post-Polymerization Functionalization in the Heterogeneous Gel State
… with tailored chain sequences using a simple, post-polymerization functionalization method conducted in the heterogeneous gel state, and investigates the effect of sPS reaction state and sPS/solvent gel morphology on the copolymer microstructure and thermal properties. Gel-state (Blocky) …
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Three dimensional molecular architectures for the synthesis and improved properties of high performance polymers
… utilize the monomer above in a biocompatible post-polymerization functionalization reaction, taking advantage of the polymer's structural motif for the controllable attachment of biotin. The utility of this method is demonstrated for a model biosensor that responds to streptavidin. Finally, we …
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The design and synthesis of linear and macrocyclic Poly(para-arylene)s
… the synthesis of poly(para-arylene)s via the post polymerization functionalization of a completely soluble and easily accessible precursor polymer, utilizing the metal-catalyzed [2+2+2] reaction. We expect that this versatile strategy could lead to new and interesting PPP derivatives. In …
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Engineering approaches to control polymer architecture
… This general methodology is based on a catalytic post-polymerization functionalization method that is shown to be compatible with any polyolefin. Chapter 3 will cover the kinetic and mechanistic studies of ring opening metathesis polymerization with third generation Grubbs catalyst. This chapter …
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Chemical and Physical Modifications of Semicrystalline Gels to Achieve Controlled Heterogeneity
… in facile proton transport. In this work, the functionalization of semicrystalline gels of poly(ether ether ketone) (PEEK) is explored as a novel post-polymerization method to prepared blocky copolymers, and the effect of copolymer architecture on membrane physical properties, structure, and …
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Metal-Free Photoredox-Mediated Ring Opening Metathesis Polymerization
… photoredox-mediated ring-opening metathesis polymerization (MF-ROMP) is a novel approach to the synthesis of ROMP polymers. Whereas traditional, metal-mediated ROMP uses well-defined transition metal-alkylidene initiators in stoichiometric amounts, MF-ROMP uses a photo-oxidant to oxidize an …
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Synthesis and Characterization of Novel Polyethers and Polypeptides for Use in Biomedicine and Magnetic Resonance Imaging
… functional groups were functionalized after polymerization and the functional polymers formed pH-sensitive micelles in aqueous medium. The copolyethers were loaded with ritonavir yielding well-controlled nanoparticles. Poly(L-glutamic acid) is comprised of naturally occurring L-glutamic acid …
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Design and synthesis of mechanoresponsive materials and multivalent polymer-peptide conjugates
… including specially designed monomers and post polymerization functionalization. This thesis focuses on two examples of intrinsic functionalization. First, mechanophores are incorporated into polymers and impart function when materials are subjected to mechanical force. Second, multivalent …
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Designing Functionality into Step-Growth Polymers from Liquid Crystallinity to Additive Manufacturing
Step-growth polymerization facilitates the synthesis of a wide range of industrially applicable polymers, such as polyesters and polysulfones. The choice of backbone and end group structure within these polymers drastically impacts the final material properties and processability emphasizing the …
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New Purification Strategies and Monomer Platforms for Ruthenium-Initiated Living Ring-Opening Metathesis Polymerization
… Capture Purification and Ring-Opening Metathesis Polymerization In chemical spaces where difficult purifications are commonplace, innovative purification methodologies have been developed to circumvent the limitations associated with classical physiochemical property-driven purifications …
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Synthetic Design of Multiphase Systems for Advanced Polymeric Materials
… (PEEK) through both solution-state and gel-state functionalization methods. The multiphase gel-state chemistry restricts functionalization to the amorphous regions of the semi-crystalline parent homopolymer and generates a copolymer with a blocky microstructure. Solution-state functionalization …
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Crystallization Behavior, Tailored Microstructure, and Structure-Property Relationships of Poly(Ether Ketone Ketone) and Polyolefins
… poly(ether ketone ketone) (PEKK) with a copolymerization ratio of terephthalate to isophthalate moieties (i.e., T/I ratio) of 80/20. Due to the fast heating and cooling rates of the Flash DSC, PEKK underwent melt-reorganization upon heating at slow heating rates. This discovery resulted in …
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The Effect of Ionomer Architecture on the Morphology in Gel State Functionalized Sulfonated Syndiotactic Polystyrene
… copolymers have been prepared over a range of functionalization (from 2% to 10%) in order to assess the effect of the incorporation of these polar side groups on both the thermal behavior and morphology of these polymer systems. The two different architectures are achieved by conducting the …