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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 20 of 32 for “"dimethacrylate"”.
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Structure and Properties Of dimethacrylate-Styrene Resins and Networks
… and construction industries is the dimethacrylate matrix resin. An investigation of the relationships between the chemical structures and properties of these dimethacrylate/styrene networks has been conducted. Oligomer number average molecular weights of the polyhydroxyether ranging …
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Polymer Stabilized Magnetite Nanoparticles and Poly(propylene oxide) Modified Styrene-Dimethacrylate Networks
Magnetic nanoparticles that display high saturation magnetization and high magnetic susceptibility are of great interest for medical applications. Nanomagnetite is particularly desirable because it displays strong ferrimagnetic behavior, and is less sensitive to oxidation than magnetic transition …
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Inter-Relationships Between Chemistry, Network Structure and Properties of Chain Growth Dimethacrylate Thermosets
Dimethacrylate oligomers diluted with styrene reactive diluents (so-called vinyl ester resins) are becoming increasingly important for composites in applications such as transportation vehicles, printed wiring boards and civil infrastructure. This research has focused on the generation and …
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The Chemistry of Dimethacrylate-Styrene Networks and Development of Flame Retardant, Halogen-Free Fiber Reinforced Vinyl Ester Composites
One of the major classes of polymer matrix resins under consideration for structural composite applications in the infrastructure and construction industries is vinyl ester resin. Vinyl ester resin is comprised of low molecular weight poly(hydroxyether) oligomers with methacrylate endgroups diluted …
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Synthesis and Characterization of Responsive Poly(Alkyl Methacrylate) Topologies
Dimethacrylate monomers containing two cleavable tert-butyl ester groups were synthesized and utilized in the synthesis of star-shaped polymers. Star polymer coupling was achieved by reacting the living poly(alkyl methacrylate) using 2,5-dimethyl-2,5-hexanediol dimethacrylate (DHDMA) or dicumyl …
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Efeito in vitro da erosão nas propriedades nanomecânicas de resinas compostas
… properties (nanohardness and elastic modulus) of dimethacrylate-resin and silorane-resin composites. Three compounds were investigated: Filtek Z250, Filtek Z350 and Filtek Filtek P90. Five samples of each material were prepared in accordance with the storage medium: erosive challenge and …
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New polymeric biomaterial interfaces for biosensor applications
… graft-copolymer and poly(ethylene glycol) dimethacrylate hydrogel. Poly(allylamine)-g-poly(ethylene glycol) polycation graft-copolymers were designed, synthesized, and characterized in order to combine bio-functionality with patternability on charged polyelectrolyte multilayer surfaces. …
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Influence of static and dynamic topography on osteoblast proliferation and maturation
… acrylate-benzyl methacrylate-1,12-dodecanediol dimethacrylate, which can be compressed to remove all surface topography and at 37˚C shows nearly complete recovery within 8 hours. The examination of pre-osteoblast MG63 cell behavior on these SMPs (with and without compression) by DNA and ELISAs …
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Novel Carbazole Based Methacrylates, Acrylates, and Dimethacrylates to Produce High Refractive Index Polymers
… aromatic based methacrylates, acrylates, and dimethacrylates are excellent materials with many applications in dentistry, microelectronics, and optics, including optical eye wear, fiber optics, and non-linear optics, such as holography. Carbazole based polymers have demonstrated good optical, …
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A study investigating the mechanical testing of a novel dental restorative material and its biocompatibility
… Ormocer Admira (VOCO, Cuxhaven, Germany), dimethacrylate FiltekTMZ250 (St Paul, MN, US) and a novel RBC namely X-tra Fil (VOCO, Cuxhaven, Germany). These materials were tested using bi-axial flexure, vickers hardness, water sorption and water solubility tests, but a one-way ANOVA showed no …
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Development of Polymer Monoliths for the Analysis of Peptides and Proteins
… over the conventional ethylene glycol dimethacrylate crosslinker for the preparation of polymer monoliths was found to be advantageous for the analysis of biological compounds in several chromatography modes.
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Air-gap sacrificial materials by initiated chemical vapor deposition
P(neopentyl methacrylate-co-ethylene glycol dimethacrylate) copolymer, abbreviated as P(npMAco-EGDA), was selected as the potential air-gap sacrificial material among possible combination of twenty monomers and four crosslinkers. P(npMA-co-EGDA) was deposited onto substrates using initiated …
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Microfluidic cell culture chambers with nanoporous walls for chemical communication
… poly(2-hydroxyethyl methacrylateco-ethylene dimethacrylate) (HEMA-EDMA), to fabricate a microwell array with 105 individual culture chambers. Pore size of HEMA-EDMA was confirmed by ESEM imaging to be less than 200 nm, adequate for isolating all identified bacteria. We have video-recorded …
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Downstream Processing with Affinity Chromatography. A Study of a Continuous Process for Biospecific Adsorption
… of hydroxy ethyl methacrylate - ethylene glycol dimethacrylate was synthesised and coupled with the ligand p-aminobenzamidine. Although the adsorbent displayed sufficient affinity towards trypsin, the overall adsorption performance was not satisfactory. Subsequent studies were carried out with a …
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Aerogels and films through free radical polymerization
… diacrylate (HDDA) or ethyleneglycol dimethacrylate (EGDMA) as molecular crosslinkers induces phase-separation of "live" nanoparticles that react with one another forming a robust, covalently bonded 3D network than can be dried into carbonizable and eventually graphitizable aerogels. …
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Novel approaches to engineer glucose biosensors
… pyrrolidone with 2.5 mol% ethylene glycol dimethacrylate using the water soluble initiators – ammonium persulphate and sodium metabisulfite under a nitrogen atmosphere. The hydrogel was applied to the sensor by dip coating during polymerisation. Electrochemical measurements revealed that …
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Novel Building Blocks for Molecular Imprinting: Pyridine-Based Binding Monomers and Bio-Renewable Cross-Linkers
… bio-sustainable alternative to ethylene glycol dimethacrylate (EGDMA) in the Molecular Imprinting technology. Herein we will report on the preparation of novel MIPs selective towards uridine prepared using BAAPy as the functional monomer, 2′,3′,5′-tri-O-acetyluridine (TAU) as the dummy template …
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Fabrication and characterization of synthetic substrates for use in rigidity cell culture studies of valvular interstitial cells for aortic valve tissue engineering
… n-octyl methacrylate (nOM) and diethylene glycol dimethacrylate (DEGDMA) offers attractive material properties that overcome these limitations. We have fabricated co-polymer networks with 3 to 33 wt% DEGDMA with bulk compressive modulus of 25±2 to 4700±300 kPa. Nanoindentation determined cellular …
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High elastic modulus nanopowder reinforced resin composites for dental applications
… methacrylate (Bis-GMA): triethylene glycol dimethacrylate (TEGDMA) monomers. Surfactants, silanizing agents and primers are examined to obtain higher filler levels and enhance the bonding between filler and matrix. Silane agents work best. The elastic modulus of a 57.5 vol% alumina/resin …
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Modification of the mechanical properties of synethetic hydrogels by various techniques
… acid, crosslinked with ethylene glycol dimethacrylate and having an equilibrium water content at pH 8.5 of 74% by weight. Three methods of incorporating hydrophobic groups into the polymer have been investigated, in order to compare the reinforcing effects of each, viz. reinforcement by …
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