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Showing 1 to 20 of 28 for “"macromonomers"”.
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Synthetic strategies for control of structure from individual macromolecules to nanoscale materials to networks
Chapter 1. Aqueous self-assembly of prodrug macromonomers. A series of highly tunable micelles for drug delivery were made from norbornene based poly(ethylene glycol) macromonomers with covalently linked drugs. A total of five macromonomers were made using three different drugs (telmisartan, …
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Synthesis of well-defined single and multiphase polymers using various living polymerization methods
… (PMMA) and poly(dimethylsiloxane) (PDMS) macromonomers were synthesized using living polymerization techniques. The PDMS macromonomers were prepared by the anionic ring-opening polymerization of hexamethylcyclotrisiloxane followed by termination with a functionalized chlorosilane …
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Synthesis and characterization of polymacromonomers based on polyethers
The synthesis and polymerization of macromonomers containing a polymerizable styrene head group and a tail of ethylene oxide derivatives of different character were investigated. The synthesis of macromonomers was based on living anionic polymerization of oxiranes. Two monomers were used: …
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Synthesis of novel siloxane-containing block and graft copolymers by anionic polymerization and the macromonomer technique
… technique was extended to the preparation of macromonomers and from these macromonomers the synthesis of graft copolymers. These siloxane macromonomers were then incorporated into acrylic and styrenic copolymers via free radical and anionic techniques. A series of graft copolymers were …
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Rational design of polymer networks and bottlebrush block copolymers
… Bottlebrush Polymers from A-branch- B Diblock Macromonomers We synthesize branched macromonomers that contain two different polymers polymers to form bottlebrush block copolymers with a novel architecture. Bulk state and thin film self-assembly studies were performed and open the door to new, …
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Bottlebrush and related polymer architectures for biomedical applications
… Chapter 2: Scalable Synthesis of Multivalent Macromonomers for ROMP Here, we report the three-step convergent synthesis (two-step longest linear sequence) of a divalent exo-norbornene imide capable of efficient coupling with various nucleophiles and azides to produce diversely functionalized …
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Advancements in branched bottlebrush polymers for responsive, targeted imaging
… metathesis copolymerization of two new branched macromonomers: one carries a bis-spirocyclohexyl nitroxide and the other the NIR dye Cy5.5. Promising preliminary results with the resulting polymers in solution MRI and NIR imaging studies as well as in vitro toxicity led us to explore the …
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Well-defined molecular brushes: Synthesis by a "grafting through" strategy and self assembly into complicated hierarchical nanostructures
… first step involves the preparation of linear macromonomers whose chain ends are functionalized with polymerizable groups and the second step is the polymerization of chain end functional groups. In this dissertation, living/controlled radical polymerization, ring opening polymerization and …
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Well defined graft copolymers and end functional materials: synthesis, characterization and adhesion studies
… terminal poly(methyl methacrylate) (PMMA) macromonomers of controlled molecular weight and narrow molecular weight distribution. A systematic series of PMMA macromonomers were copolymerized with 2-ethylhexyl acrylate to afford poly(2-ethylhexyl-g-methyl methacrylate) copolymers. These …
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Developing novel polymer architectures for applications In magnetic resonance imaging and self-assembly
… In this "graft-through" approach, bivalent macromonomers bearing a terminal exo-norbornene group were synthesized and polymerized to yield bottle-brush polymers with controlled molar masses and low dispersities. This approach is first utilized in the development of organic radical contrast …
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Direct Chain-End Functionalization of Living Polyisobutylene With Phenoxyalkyl(meth)acrylates
… had been consumed. All difunct10nal, telechehc macromonomers obtamed were charactenzed by proton (1H) and carbon (13C) NMR, GPC and MALDI-TOF MS This study represents a novel method of generatmg telechehc polyisobutylene (meth)acrylate-functional macromonomers ma "one-pot, one step" …
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Design and development of Brush-Arm Star Polymers for applications in drug delivery
… arms. We synthesized a variety of functional macromonomers and crosslinkers to use in BASP synthesis. For example, drug-loaded doxorubicin macromonomers were synthesized that could release free doxorubicin under a light stimuli or by hydrolysis. Crosslinkers were designed to facilitate BASP …
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Synthesis and Characterization of Responsive Poly(Alkyl Methacrylate) Topologies
… resulted in α,α-dihydroxy PMMA. The graft macromonomers poly(tert-butyl styrene-block-styrene) methacrylate and poly(styrene-block-tert-butyl styrene) methacrylate were synthesized from the corresponding diblock copolymer alcohols utilizing acid chloride chemistry. Excellent molecular …
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Synthesis and Characterization of Complex Polymer Topologies using Ring-Opening Metathesis Polymerization
… with methacrylate group. Furthermore, multiple macromonomers were prepared using ATRP and photoiniferter polymerization that are functionalized with norbornene. These macromonomers were used in the following ROMP reaction to result in multiple series of amphiphilic bottlebrush block copolymers …
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Lignin valorization
… in a better candidate as carbon precursor and macromonomers for the synthesis of polymer than organosolv lignin. In fact, alkaline lignins showed higher residual mass after carbonization and higher content of the reactive hydroxy functionalities. In contrast, the lignin source turned out to …
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Designing Microporous Polymers for Separations
… 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 film. Pure-gas experiments are performed to …
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A 'Toolkit' of Small Molecules for Polymer Assembly and Post-Synthetic Modification Using 'Click' and Photoactive Chemistries
… chapters. In Chapter 5 small molecules and macromonomers are described that build upon the compounds described in previous chapters which collectively form the basis of a 'toolkit' approach to polymer assembly and modification. Variations and extensions upon the 'toolkit' are detailed in …
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Design of PolyMOCs and the synthesis of crosslinkers for the BASP platform
… Chapter 2 outlines the synthesis of norbornene macromonomers (MMs) with varying anchor groups and crosslinkers that are stimuli-sensitive for the brush-arm star polymer (BASP) drug delivery platform. Variation of MM anchor groups modifies the rate of propagation of ring-opening metastasis …
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Bottlebrush block copolymers for photonic materials
… synthesised based upon polyester or polyether macromonomers, including: polylactide, polycaprolactone, or polyethylene glycol. These BBCPs are self-assembled within emulsified droplets into microparticles with a photonic glass architecture that reflects vibrant structural colour. Importantly, a …
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Morphological effects on gas transport through poly(methylmethacrylate)-poly(dimethlysiloxane) graft copolymers and instrumentation for their synthesis and permeability characterization
… poly(dimethylsiloxane) CPDMS) "macromonomers" with methylmethacrylate, using conventional free-radical and novel anionic and group transfer techniques. These techniques are described and referenced with chemical characterization provided. The resulting graft copolymers have …
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