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Showing 1 to 20 of 24 for “"Macromonomer"”.
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Synthesis of novel siloxane-containing block and graft copolymers by anionic polymerization and the macromonomer technique
… is now possible with the recent advent of the macromonomer technique. Copolymers with narrow molecular weight distributions of the backbone as well as the grafts are possible. The anionic alkyl- lithium initiated ring opening polymerization of the hexamethylcyclotrisiloxane has been …
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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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Development of novel polymeric nanoparticles with tailored architectures and functionalities/
… metathesis polymerization (ROMP) of a norbornene-macromonomer to create the brush-arms, and second, cross-linking the arms with a bis-norbornene cross-linker to afford star polymers via the "arm-first" star polymer method. Functionality can be installed into the macromonomer (MM) or crosslinker …
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Development of novel polymeric architectures for applications in drug delivery and studies towards the synthesis of perfect polymers by iterative exponential growth "Plus" (IEG+)
… conjunction with a poly(ethylene glycol) (PEG) macromonomer, provided highly controlled BASP formation reactions. Combination of this new crosslinker with a novel acid-labile doxorubicin (DOX)-branch-PEG macromonomer provided BASPs that simultaneously degrade and release DOX in cell culture. In …
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Synthesis, characterization and kinetic investigations of heterophase materials prepared using group transfer polymerization
… synthesized. Transformation reactions and the macromonomer technique to interrelate different synthetic routes further extends the range of block and graft copolymers which can be prepared. Poly(dimethylsiloxane) (PDMS) macromers were prepared via the anionic ring opening polymerization of …
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Bottlebrush and related polymer architectures for biomedical applications
… delivery platform, and the branched macromonomer approach is also discussed. 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 …
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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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Tailoring Reactivity, Architecture and Properties of High Performance Polyimides: From Additive Manufacturing to Graft Copolymers
… of a poly(ethylene glycol) (PEG) bearing macromonomer facilitated synthesis of PEIs and PI graft copolymers. When coupled with 4,4'-(4,4'-isopropylidene-diphenoxy)diphthalic anhydride (BPADA) and meta-phenylene diamine (mPD), the PEG-grafted materials exhibited signs of phase mixing at low …
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Studies of polymers in fouling release coating science
… prepared and characterized a polymerizable macromonomer, PEG-PS-DVB. A preliminary application of the polymer was investigated and nanoparticles were prepared by microemulsion polymerization. According to the characterizations, the nanoparticles have crosslinked cores and could be used as …
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SYNTHESIS AND CHARACTERISATION OF NOVEL BIOPOLYMERS VIA CLICK CHEMISTRY
… grafting techniques; "grafting through" (the macromonomer approach) and "grafting onto" were involved in the synthesis. The "grafting through" method involved the synthesis of oxanorbornenyl di-PEG macromonomer by Click coupling of azide terminated PEG with di-alkyne functionalised …
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Ionic Copolymer-Magnetite Complexes for Magnetic Resonance Imaging and Drug Delivery
… An acrylate-functional poly(ethylene oxide) macromonomer and hexyl (and propyl) ammonium bisphosphonate methacrylate monomers were synthesized. Conventional free radical copolymerizations were conducted to synthesize the graft copolymers. The acrylate-functional poly(ethylene oxide) …
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Copolymerization of a P-Vinylbenzyl-Ended Poly(Oxyethylene) With Vinyl Monomers and Some Reactions of Poly(Oxyethylene) Derivatives
… resulted in incomplete polymerization of the macromonomer. In addition, the reactions of mPEG-maleic anhydride {prepared from the reaction of 5-[methoxypoly(oxyethylene)]-(3E)-1,3 pentadiene and maleic anhydride} with amines such as 2-methylaniline, 2-(2-aminoethoxy) ethanol, and ethyl ester …
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Design and development of Brush-Arm Star Polymers for applications in drug delivery
… (ROMP) of a norbornene functionalized PEG-based macromonomer to first form a living bottle-brush initiator. Next, a bifunctional norbornene crosslinker is added to the bottle-brush polymer to yield star polymers with a crosslinked-core and bottle-brush polymer arms. We synthesized a variety of …
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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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Dendronized Amphiphilic Copolymers Synthesized from Methacrylate Derivatives as Potential Topical Microbicides
… toward this goal. Novel dendritic methacrylate macromonomers––di-tert-butyl 4-(2-tert-butoxycarbonyl-ethyl)-4-[3-(2-methacryoloxyethyl)ureido]heptandioate (MI) and di-tert-butyl 4-(2-tert-butoxycarbonylethyl)-4-[3-methyl-3-(2-methacryoloxyethyl)ureido]heptanedioate (MIII)––were synthesized, …
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Toward commercializable microphase-separating copolymer electrolytes for rechargeable lithium batteries
… siloxane) [PDMS] monomethacrylate-terminated macromonomer. When doped with lithium triflate this material exhibited a conductivity of [sigma] [approximately] 8 x 10⁻⁶ S/cm at 23° C.This material was found to be stable up to [approximately] 300° C and flow resistant below an applied pressure of …
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Block and Graft Copolymers Containing Carboxylate or Phosphonate Anions
… acrylate-functional poly(ethylene oxide) (PEO) macromonomer produced graft copolymers. Quantitative deprotection of the alkylphosphonate groups afforded graft copolymers with zwitterionic ammonium bisphosphonate or anionic phosphonate backbones and PEO grafts. The zwitterionic copolymers …
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Polymerizable Peptide Monomers for the Targeted and Intracellular Delivery of Cancer Therapeutics
… active BIM peptide. A methacrylamido-peptide macromonomer containing BIM capped with a four amino acid (FKFL) cathepsin B substrate was synthesized and directly integrated into the polymeric delivery vehicle via RAFT polymerization. The resulting cathepsin-B cleavable BIM prodrug system …
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New block copolymers of Isobutylene by combination of cationic and anionic polymerizations
… methods, this polymer was convertet to a macromonomer with a pendant thiophene group, which is accessible in the 1- and 5-position. Oxidative copolymerization with thiophene led to graft copolymers consisting of polythiophene-graft-PIB.
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Design, Synthesis and Application of Novel Degradable Materials Based on Polyesters by Radical Ring-Opening Polymerization
… were used for cross-linking with hydrophilic macromonomer (oligo(ethylene glycol) methacrylate, OEGMA) by radical polymerization in a second step for the formation of enzymatically degradable APCNs. Enzymatic degradability was studied using Lipase from Pseudomonas cepacia. Due to the …
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