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Showing 1 to 20 of 34 for “"Crosslinkable"”.
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Reversibly Photo-Crosslinkable Polycarbonate-Based Polymersomes for Drug Encapsulation and Delivery
This thesis describes the preparation of polymersomes from poly(ethylene glycol)-block-polycarbonate (PEG-PC) copolymers functionalized with pendant coumarin groups. Coumarin groups undergo photo-reversible dimerization when irradiated with specific ultraviolet wavelengths, so they can be used to …
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Highly productive ester crosslinkable composite hollow fiber membranes for aggressive natural gas separations
… to date. On the other hand, the high cost of crosslinkable polymers makes the approach challenging, especially for large-scale gas separations which require large membrane areas with high feed pressures. Dual-layer hollow fiber spinning can be used to reduce the cost of membrane production by …
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Creation of crosslinkable interphases in polymer blends by means of novel coupling agents
The goal of the work is to study possibilities for the modification of interface in immiscible polymer blends, which determine to a large degree of the blend properties. For this purpose novel coupling agents (named SCA) containing 2-oxazoline, 2-oxazinone, and hydrosilane reactive sites have been …
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The Development of Photo-crosslinkable Trapping Mutants as Tools to Investigate the Interactions of Protein Tyrosine Phosphatases
Abnormalities in the coordinated activities of protein phosphatases (PPs) and<br/>protein kinases (PKs) contribute to the development of many diseases.<br/>Phosphatase of regenerating liver (PRL)-3 and Vaccinia H1-Related (VHR) are<br/>two members of the protein tyrosine phosphatase (PTP) family …
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Design, Synthesis and Study of Thermomechanically Active Polymer Networks Based on Latent Crosslinking of Semicrystalline Polymers
… fabrication, and characterization of novel crosslinkable semicrystalline polymeric materials utilizing different techniques and mechanisms in order to explore their special thermomechanical features as well as the possibilities for potential industrial application based on shape memory (SM) …
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Photo-crosslinked Surface Attached Thin Hydrogel Layers
… monomer resulted in formation of photo-crosslinkable polymers of (a) HEMA, (b) DMAAm, (c) NIPAAm/DMAAm, (d) NIPAAm/Cyclam. The properties of these polymers were investigated by NMR, UV-VIS spectroscopy, GPC and SPR. Thin hydrogel layers were prepared by spin coating on gold-coated LaSFN9 …
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Recycling of crosslinked high density polyethylene through compression molding
Crosslinkable high density polyethylene (XHDPE) is used to manufacture large and rigid products such as fuel tanks using a rotomolding process. Currently, defective and post-consumer parts are not recycled and sent to landfills. Hence, recycling of this material through compression molding is the …
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Polyelectrolyte multilayers incorporating photocrosslinking polymers for controlling 2- and 3-dimensional structure
… esterification reaction to incorporate photo-crosslinkable vinylbenzyl side groups, making poly(acrylic acid-ran-vinylbenzyl acrylate) (PAArVBA). The chemical modification was characterized by nuclear magnetic resonance spectroscopy (NMR) and light spectroscopy.
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Microfluidic synthesis and properties of bio-inspired colloids
… the cellular size regime (>/= 10 [mu]m) from UV-crosslinkable oligomer formulations in a semi-continuous fashion. By modulating the degree of oxygen inhibition during synthesis, we achieve previously unattainable particle sizes. Brownian diffusion of colloidal discs in bulk suggests the …
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Self assembled transmembrane protein polymer conjugates for the generation of nano thin membranes and micro compartments
… and the polymer chains crosslinked using a UV crosslinkable comonomer to engender the membrane. The protein used for the studies reported herein was one of the largest transmembrane channel proteins, ferric hydroxamate uptake protein component A (FhuA), found in the outer membrane of …
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EVALUATION OF NOVEL PREFORMED PARTICLE GELS FOR CONFORMANCE CONTROL AND ACID STIMULATION THROUGH CORE FLOODING TESTS
… Degradable Preformed Particle Gel (DPPG) and Re-crosslinkable Preformed Polymer Gel (RPPG). DPPG is designed to be a temporary plugging agent for acid stimulation and can self-degrade into a water-like fluid. RPPG is designed for reservoir sweep efficiency improvement and can re-crosslink to each …
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Development of functional hydrogels for sensor applications
… immobilized on surfaces by copolymerizing photo crosslinkable units. The immobilized systems were formulated to give different layer thicknesses, swelling ratios and mesh sizes depending on the demand of the coupling reaction. The coupling of detector units or model molecules is approached via …
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Plugging performance of preformed particle gels in fractures and its influencing factors
… residual resistance factor. Finally, a novel re-crosslinkable preformed particle gel (RPPG) was evaluated as an agent specifically designed for healing large fractures. The evaluation of oxidizing breakers for the re-crosslinked RPPG was provided. Among the tested breakers, NaOH-activated …
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Evaluation of recrosslinkable preformed particle gel (RPPG) as a fluid loss control material during drilling operations
… research, a comprehensive evaluation of a re-crosslinkable preformed particle gel (RPPG) has been conducted to determine the extent to which it can be used to control drilling fluid losses during drilling operations. The RPPG consists of swellable gel particles that can self-crosslink to form …
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Synthesis and characterization of phenylethynyl endcapped polyetherimide oligomers
… high TGA char yields in air. Phenylethynyl crosslinkable materials were effectively cured at 380°C to produce solvent resistant networks that were ductile, and which also generated high char yields, suggesting their possible utilization in fire resistant matrix systems.
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DEVELOPMENT OF SYNTHETIC POLYMERS FOR BONE TISSUE ENGINEERING: ENGINEERING THE DEGRADATION RATE
… unit increases the chain length between the crosslinkable fumarate (C=C) double bond. Because of this, It was hypothesized that PBF allow for a greater water ingress and therefore an increased rate of degradation relative to PPF. Results from In vitro accelerated degradation studies confirmed …
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Encapsulation of chemical catalyst and structural epoxy in microcapsules generated via microcapillary devices
… in pressure-sensitive capsules composed of UV-crosslinkable acrylate (trimethylolpropane trimethacrylate). These capsules are monodisperse, and have a failure strength that can be adjusted across 2-3 orders of magnitude by changing capsule size, shell thickness, or microstructure. Based on pH …
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Chemical and enzymatic tools to study proteins in their native cellular environment
… its high geometric constraint to its proximal crosslinkable C-H bonds may decrease its crosslinking yield. Knowing the protein structure and amino acid environment surrounding benzophenone could help in choosing the most optimal position for the photocrosslinker. Finally, in a different …
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Effect of Electrospun Mesh Diameter, Mesh Alignment, and Mechanical Stretch on Bone Marrow Stromal Cells for Ligament Tissue Engineering
… The scaffold was also embedding in a photo-crosslinkable hydrogel to prevent the fibers from collapsing. These results demonstrate the feasibility of making a tissue engineered ligament by seeding BMSCs on an aligned, co-electrospun scaffold with submicron diameter fibers and then applying …
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Synthesis and characterization of novel macromolecules/networks via side chain modifications of amorphous poly(arylene ethers)
… The pendant amines were also reacted to form crosslinkable groups such as maleimides and phenylethynyl phenyl imides. These were thermally treated to induce crosslinking and formed ductile networks which had improved solvent resistance and higher glass transition temperatures. The poly(arylene …
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