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Showing 1 to 20 of 33 for “"butyl methacrylate"”.
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Synthesis and characterization of poly[styrene-block-n-butyl methacrylate]
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1998.
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Synthesis and characterization of well-defined methacrylic-based block ionomers
… revolves around the incorporation of t-butyl methacrylate into block copolymers utilizing anionic living polymerization techniques. The synthesis of t-butyl methacrylate/n-hexyl methacrylate and t-butyl methacrylate/2-ethylhexyl methacrylate di- and triblock copolymers was done by …
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Polymer/Clay Nanocomposites as Barrier Materials Used for VOC Removal
… to examine in situ polymerization of poly (n-butyl methacrylate) in the presence of nanoclay. In this study the clay wt% was kept at a low concentration of 1-5 wt%. The surface modification of natural montmorillonite, Cloisite ® Na+, was achieved via ion exchange, and the effect of …
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Structure-property relationships in novel ionomers
… telechelic ionomers based on sulfonated polyisobutylene exhibit primary and secondary SAXS peaks when the molecular weight distribution is narrow (Mw/Mn ca. 1.15). These SAXS peaks are interpreted as due to non-global lamellar or cylindrical ionic domain order. The non-global ordering strongly …
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Functional Triblock Terpolymers for Multicompartment Micelle and Janus Particle Synthesis
… polystyrene-block-polybutadiene-block-poly(methyl methacrylate) and polystyrene-block-polybutadiene-block-poly(tert-butyl methacrylate). However, these polymers do not offer many possibilities of chemical alterations and stimuli-responsive elements. Therefore, potential new functional monomers for …
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Composite cathodes for lithium rechargeable batteries
… The copolymers include poly[(oxyethylene)9 methacrylate]-block-poly(butyl methacrylate) (POEM-b-PBMA) with a domain periodicity of -35 nm made by atom transfer radical polymerization, and poly[(oxyethylene)9 methacrylate]-graft-poly(dimethyl siloxane) (POEM-g-PDMS) with a domain periodicity …
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Carbohydrate Mediation of Aqueous Polymerizations: Cyclodextrin Mediation of Aqueous Polymerizations of Methacrylates
… mediation of a series of methacrylic monomers. t-Butyl methacrylate, n-butyl methacrylate, cyclohexyl methacrylate, and 2-ethylhexyl methacrylate were complexed with methylated(1.8)-beta-cyclodextrin and subsequently dissolved in either water or ethylene glycol. The complexes were studied by 1H …
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Synthese und kolloidale Eigenschaften neuartiger Blockcopolymere mit beta-Dicarbonyl Einheiten = Synthesis and colloidal properties of a novel type of block copolymers bearing beta-dicarbonyl residues
… (RAFT).Different micellar morphologies of poly(n-butyl methacrylate)-block-poly[2-(acetoacetoxy)ethyl methacrylate] (pBuMA-b-pAEMA) were observed in cyclohexane as a selective solvent. Depending on the block length ratio, either spherical, elliptical, or cylindrical micelles were formed. The …
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Non-Aqueous Dispersion Polymerization for Automotive Coating Applications
… process. Three categories of unsaturated poly(methacrylate) dispersants are examined, a butyl methacrylate (BMA) based material with grafted vinyl functionality, vinyl-terminated BMA homopolymer macromers, and hydroxyl group functionalized macromers. The macromers provided more effective …
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New Double-Responsive Micelles of Block Copolymers Based on N,N-Diethylacrylamide: Synthesis, Kinetics, Micellization, and Application as Emulsion Stabilizers
… this synthetic concept and using poly(tert-butyl acrylate)-Li, and poly(tert-butyl methacrylate)-Li as macroinitiators, well-defined poly(tert-butyl acrylate)-block-PDEAAm, and poly(tert-butyl methacrylate)-block-PDEAAm block copolymers were obtained. Although the blocking efficiencies …
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Polymeric Nanoparticles for the Modification of Polyurethane Coatings
… narrowly distributed polybutadiene-b-poly(methyl methacrylate) (B-M) block copolymers differing in composition and molecular weights were synthesized and studied with respect to their self-assembly in organic selective solvents. Dynamic light scattering and transmission electron microscopy …
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Emulsion Polymerization Using Switchable Surfactants
… the emulsion polymerization of styrene, methyl methacrylate (MMA) and/or butyl methacrylate (BMA): N’-hexadecyl-N,N-dimethylacetamidine (1a), N’-dodecyl N,N-dimethylacetamidine (2a) and N’-(4-decylphenyl)-N,N-dimethylacetamidine (3a). A systematic study of the effects of surfactant and initiator …
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The blending and permeability of polymers for packaging applications
… as, maleic anhydride(MA) grafted on PP, MA and butyl methacrylate(BMA) co-polymer grafted on PP, and BMA grafted on low density polyethylene. The effect of two silanes( methacrylate functional and vinyl functional) on PP were also investigated and also the plasticization of PA6 with formic acid. …
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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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Characterization of Spin Coated Polymers in Nano-environments as a Function of Film Thickness
… brush films. For the first study, polymethyl methacrylate films were spin coated onto silicon wafers, and the film thickness was determined using ellipsometry. A series of thin films were examined using techniques such as dielectric analysis and thermal mechanical analysis. The theory of …
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Synthetic polymers for ophthalmic applications
… branched siloxy compounds with polymerizable methacrylate groups. There is a need for standard techniques to assess laboratory behaviour in relation to in vitro performance. A major part of the present work is dedicated to the establishment of such standardised techniques. It is apparent that …
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Investigations utilizing mono- and difunctional organo alkali metal initiators for anionic polymerization
… by the addition of two equivalents of sec-butyllithium to one of the nonconjugated diene 1,3-bis(α-phenylethenyl)benzene. The disappearance of the starting diene was easily followed by UV/Visible spectroscopy. Rate expressions were evaluated based on the assumptions of a consecutive …
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Shear-induced alignment in block copolymer solutions
… diblock copolymer polystyrene-b-poly(t-butyl methacrylate) (ST) as solutions at different concentrations was investigated by scanning of moduli over a range of temperatures and the morphological transitions were detected. This led us to conclude that dioctyl phthalate is a selective …
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Well-defined molecular brushes: Synthesis by a "grafting through" strategy and self assembly into complicated hierarchical nanostructures
… poly(methyl acrylate), poly(t-butyl acrylate), poly(methyl methacrylate), poly(t-butyl methacrylate), polylactide, poly(ethylene glycol) and polyhedral oligomeric silsesquioxane: POSS). The high versatility of our strategy is also used to increase the complexity of the resulting …
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