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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 259 for “"acrylate"”.
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Aluminium triethyl initiated acrylate polymerizations
204 leaves : ill.
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Biomedical Applications of Thiol-Acrylate Polymers
… of biocompatible polymers using thiol-acrylate Michael addition reactions between not only acrylates and thiols but also between amines and acrylates were demonstrated. The synthesis of an in situ tertiary amine catalyst initiates the propagation steps of the polymerization process by …
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Lignin acrylate derivatives and their behaviors in free radical copolymerizations
… subjected to reaction with isocyanatoethyl methacrylate (IEM) using dibutyltin dilaurate as catalyst. The acrylate derivatives were characterized by elemental analysis, UV, IR, <sup>1</sup>H-NMR, and <sup>13</sup>C-NMR spectroscopy. The acrylated lignin model compounds, guaiacol-IEM urethane …
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A potential route to hydrogel multifunctionalization utilizing encapsulation of acrylate-conjugated streptavidin
… binding to poly(ethylene glycol) (PEG) diacrylate and dextran acrylate hydrogels. Such gels were made by photocrosslinking solutions of APN and streptavidin conjugated at various molar ratios, along with a gelling polymer under an ultraviolet (UV) lamp. Acryl group conjugation was …
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Group 10 Metal Catalytic Olefin Polymerization and Synthesis of Ethylene/Acrylate Block Copolymers
… olefin polymerization and synthesis of ethylene/acrylates block copolymers. The distorted sandwich α-diimine Pd catalyst development exhibited high catalytic activity and living ethylene polymerization at low-pressure conditions. The resulted PEs are not only a low branching density (<17/1000 C) …
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Synthesis and Characterization of Injectable Star-shaped Poly(Lactide-co-Glycolide-co-Acrylate) Macromers
… macromer star-poly(lactide-co-glycolide-co-acrylate) (PLGAA). Thus, the goals of work are synthesis design, macromer characterization, studies of hydrogel physical properties including water content and degradation characteristics, and study of hydrogel rheological properties.</p> <p>We …
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Quantitative Evaluation of Antispasmodic Activity of 3-Tropanyl 2-(para-Chlorophenyl) Acrylate Hydrochloride on Smooth Muscle Preparations
Made available in DSpace on 2014-12-09T22:30:25Z (GMT). No. of bitstreams: 1 7013420.pdf: 5095772 bytes, checksum: af07269b8a7b9dbfcc7012c6dd82dc43 (MD5) Previous issue date: 1969
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Determination of Reactivity Ratios for Acrylonitrile/Methyl Acrylate Radical Copolymerization Via Nonlinear Methodologies Using Real Time FTIR
… copolymerization of acrylonitrile and methyl acrylate were measured by NMR on isolated, low conversion copolymers and by real time in situ FTIR. The system utilized azobisisobutyronitrile (AIBN) initiator in dimethyl formamide (DMF) at 62°. The FTIR technique allowed rapid generation of …
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Effect of chemical structure and crosslinking density on the thermo-mechanical properties and toughness of (meth)acrylate shape-memory polymer networks
… mechanical property relationships in (meth)acrylate networks. The networks are synthesized from mono-functional (meth)acrylates with systematically varying sidegroup structure and multi-functional crosslinkers with varying mole fraction and functionality. Fundamental trends are established …
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Gas transport properties of poly(n-alkyl acrylate) blends and modeling of modified atmosphere storage using selective and non-selective membranes
… of side-chain crystalline poly(n-alkyl acrylate) and poly(m-alkyl acrylate) blends are determined as a function of temperature for varying side-chain lengths, n and m, and blend compositions. The side chains of poly(n-alkyl acrylate)s crystallize independently of the main chain for n [is …
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The Effects of 3-Tropanyl 2(para-Chlorophenyl) Acrylate Hydrochloride on Gastrointestinal Motility and Secretion in Rat and Gastrointestinal Motility in Sheep
Made available in DSpace on 2014-12-09T22:30:24Z (GMT). No. of bitstreams: 1 7000892.pdf: 3862776 bytes, checksum: 4f8642e4f102559de995806ed0369ed5 (MD5) Previous issue date: 1969
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Síntese de novos adutos de Morita-Baylis-Hillman com potencial atividade biológica.
… was synthesized AMBH 8 using the 2-hydroxyethyl Acrylate 45 as Michael acceptor, giving the adducts 47 (2-hydroxyethyl [2-(hy-droxy(2-nitrophenyl)methyl)] acrylate, 71%), 48 (2-hydroxyethyl [2-(hydro- xy(3-nitrophenyl)methyl)] acrylate, 50%), 49 (2-hydroxyethyl [2-(hydroxy(4-nitrophenyl)methyl)] …
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Synthesis and <sup>1</sup>H-NMR characterization of amphiphilic acrylate block copolymers to investigate the effect of chain rigidity on micelle formation in solution
… to aggregate is also influenced by polymer size. Acrylate and methacrylate monomers were chosen for their similar chemical properties but their difference in reported glass transition temperature (<em>T<sub>g</sub>) </em><sup>1</sup>H-NMR methods were developed to measure molecular weight of …
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Copolymerizing Acrylonitrile and Methyl Acrylate by RAFT for Melt Processing Applications: A Synthetic Investigation of the Effects of Chain Transfer Agent, Initiator, Temperature, and Solvent
… copolymers of acrylonitrile (AN) and methyl acrylate (MA) were successfully prepared and characterized using reversible addition-fragmentation chain transfer (RAFT) copolymerization. A typical copolymer was charged with 15 wt. % MA content. This thesis describes a systematic variation of the …
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Encapsulation of particles using brittle coatings for subterranean applications
… was ammonium persulfate. Polyurethane and acrylate coatings were investigated. The coated particles were assessed for dissolution in water before and after being subjected to a compression test. Polyurethane-coated particles had a high leach prior to compression and were considered …
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UV-curable organic-inorganic hybrid polyurethane coating
… varying molecular weights and functional groups (acrylate and/or silane) that were cured with a single ultraviolet (UV) trigger but two photo-initiators. Upon UV irradiation, the free-radical initiator initiated a free-radical reaction for acrylate cross-linking, and the photo-latent base …
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The synthesis of amphiphilic diblock copolymers: An investigation into the formation of micelles as a function of hydrophobic block length
<p>Acrylate-based amphiphilic diblock copolymers show great potential for anti-cancer drug transport due to their ability to aggregate into protective core-shell micelles. Using RAFT polymerization, copolymers containing poly(acrylic acid) and poly(methyl acrylate) blocks were made with high …
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Tailoring Fluorene-based Oligomers for micron and sub-micron sized Photopatterning
… weight, the introduction of polymerizable acrylate moieties and the avoidance of undesired endgroups. As aryl-aryl coupling methods the nickel catalyzed Yamamoto and palladium catalyzed Suzuki condensations were applied. The completeness of the aryl-aryl coupling and the endcapping was …
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Fabrication, analysis, application, and characterization of core-containing microparticles and hydrophilic microfluidic devices produced via the primary- and in situ tertiary-amine catalyzed Michael addition of multifunctional thiols to multifunctional acrylates
… was to investigate amine-catalyzed thiol-acrylate chemistry for various novel applications that could fully utilize the untapped potential of this useful and robust chemistry. The use of this chemistry in each application solved a problem, improved on a disadvantage of current …
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Dispersionen für den Korrosionsschutz von Aluminium
… the surface. In a first step cross-linked butyl acrylate/styrene particles were formed. In a second step a mixture of functionalised acrylate and butyl acrylate/styrene was added to the system. In this way, the composite particles were obtained. Particle size and size distribution were measured …
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