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Showing 1 to 20 of 144 for “"Siloxane"”.
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Siloxane modified engineering thermoplastics
… of an amorphous polyarylester and polydimethylsiloxane were also investigated. Both the random-block and perfectly alternating synthetic routes were used and it was found that the perfectly alternating technique produced a more regular morphology; than the random-block technique. A study was …
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Preparation of Nitrile Containing Siloxane Triblock COpolymers and Their APplication As Stabilizers For Siloxane Magnetic Fluids
Nitrile containing siloxane block copolymers were developed as stabilizers for siloxane magnetic fluids. The siloxane magnetic fluids have been recently proposed as internal tamponades for retinal detachment surgery. PDMS-b-PCPMS-b-PDMSs (PDMS = polydimethylsiloxane, PCPMS = …
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Biochemical sensing using Siloxane polymer waveguides
… presented here is to extend the capabilities of siloxane waveguide technology in the field of biochemical sensing. Recent advances in the integration of polymeric optical waveguides with electronics onto standard printed circuit boards (PCBs) allow the formation of cost-effective lab-on-achip …
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Zweifach Eisen-substituierte Silane, Silanole und Siloxane
… die Synthese mehrfach metallierter Silanole und Siloxane im Vordergrund. A – Halogenierte Bis(metallo)silane: Durch schrittweise Umsetzung von HSiCl3 oder HSiCl2Me mit den Übergangsmetallaten Na[Fe(CO)2Cp] oder Li[W(CO)2PMe3Cp] wurden verschiedene bismetalliete Silane [LnM]2SiRCl (R = H, Me) …
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Selbstaggregierende Multischichten : Alkyl-Siloxane auf Biphenylthiol-Modelloberflächen
… selbstaggregierende Multischichten aus Alkyl-Siloxanen auf einer Biphenylthiol-Modelloberfläche auf Gold mit Hilfe verschiedener Meßmethoden wie Infrarot-Reflexions-Adsorptionsspektroskopie (IRRAS), Summenfrequenz-Spektroskopie (SFG), Röntgen-Photoelektronen-Spektroskopie (XPS), Ellipsometrie, …
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A Self -Healing Poly(dimethyl Siloxane) Elastomer
The self-healing performance of the elastomer is also investigated under torsional fatigue loading. The microcapsule-based self-healing PDMS is capable of recovering a significant portion of the original torsional stiffness and retards dynamic crack growth rate. Depending on the matrix material, a …
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Water ingression into poly(imide-siloxane)s
… vapor with the surface and bulk of poly(imidesiloxane) copolymers has been characterized in an attempt to determine the important factors in the copolymer's resistance to water ingression. The multi-block copolymers were synthesized from benzophenone tetracarboxylic dianhydride, bisaniline P …
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Siloxane modified engineering polymers: synthesis and characteristics
… polyand weight, randomly coupled, poly(imide siloxane) segmented copolymers were prepared and characterized. The copolymers were synthesized in two steps, the first involving the generation of soluble poly(amic acid) intermediates through reaction of various aromatic dianhydrides and aromatic …
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Ferriomethyl- und Wolframiomethyl-substituierte Silane, Silanole und Siloxane
Das Interesse an Übergangsmetall-substituierten Siloxanen ist in den vergangenen Jahren stark angewachsen. Dies ist vor allem darauf zurückzuführen, dass diesen Systemen eine wichtige Modellfunktion für auf Silica-Oberflächen verankerte, katalytisch aktive Übergangsmetallkomplexe zukommt, die eine …
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SILOXANE-CONTAINING PHOSPHOLIPIDS AS POTENTIAL DRUG DELIVERY SYSTEMS
… as DDS. This study reveals the potential for siloxane-containing phospholipids to display a higher entrapment capacity than conventional liposomes related to 1-palmitoyl-2-oleoyl-sn-glycero-3-phospcocholine (POPC) and controlled released when using the model compound, calcein. With the …
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Tailoring Siloxane Functionality for Lithography-based 3D Printing
… for systems that leveraged poly(dimethyl siloxane)s (PDMS), aliphatic polyesters, polyamides, and polyethers for emerging applications. The thiol-ene reaction possesses many desirable traits for vat photopolymerization (VP) AM, namely that it proceeds rapidly to high yield, does not …
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Siloxane modified polyurea and polyurethane urea segmented copolymers
… urea copolymers were modified in two ways: siloxane urea segmented copolymers were synthesized and physically blended into the system, and siloxane oligomers of controlled molecular weight and composition were incorporated into the copolymer backbone as a part of the soft segment. X-ray …
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Electromechanical Characterization of Poly(Dimethyl Siloxane) Based Electroactive Polymers
… polar cyano phenyl (CN) groups on poly (dimethyl siloxane) (PDMS) and 2) to characterize the electromechanical properties of the resulting CN-PDMS blend as an electroactive actuator. Materials responding to an external stimulus are referred to as electroactive materials. There are several …
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Synthesis, characterization, and evaluation of a heat stabilizing siloxane
<p>Siloxanes, renowned for their heat resistance and release properties, are prone to oxidize above 200°C. The goal herein is to increase siloxane bath life used in fuser roll applications at temperatures above 200°C, yielding faster production, less waste, and cost savings by keeping the bath …
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Templated self-assembly of siloxane block copolymers for nanofabrication
… patterns can be made from poly(styrene-b-dimethylsiloxane) (PS-PDMS) BCPs, which have a very large Flory-Huggins interaction parameter between the blocks compared to other commonly used BCPs. Cylinder- or sphere-forming BCP films were spincoated over silicon substrates patterned with shallow steps …
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Siloxane modified hybrid materials by the sol-gel process
… chosen was silanol terminated poly(dimethylsiloxane) (PDMS) and the inorganic oxide precursor chosen was titanium tetra-isopropoxide (TIP). The rationale for choosing these materials stemmed from the desire to make materials for optical filters since a gradient of optical properties can be …
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Polydimethylsiloxane Containing Block Copolymers: Synthesis and Characterization of Alternating Poly(Arylene Ether Phosphine Oxide)-B-Siloxane and Segmented Nylon 6,6 -B-Siloxane Copolymers
Two novel classes of siloxane containing, organic-inorganic block copolymers were prepared using different synthetic approaches. The first copolymers were alternating poly(arylene ether phosphine oxide)-poly(dimethylsiloxane) systems, prepared via oligomeric silylamine-hydroxyl reactions. Secondly, …
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Epoxy Siloxane Self-Cleaning Coating using F64PcZn/TiO2 Photocatalyst Composite
… composite powder incorporated into a siloxane epoxy polymer has been shown to yield a highly efficient self-cleaning coating. The composite, which makes greater use of light in the visible/near-infrared (NIR) region, was prepared by coating a nano-particle photocatalytic …
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The Development of Microfluidic Devices Fabricated From Poly(dimethyl) Siloxane
… of microfluidic devices using poly(dimethyl) siloxane (PDMS). Fabrication involved lithographic and ""soft"" lithographic techniques. Capillary electrophoretic separation ""chips"" as well as a series of patterns for surface functionalization were demonstrated in PDMS. PDMS proved to be a …
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Siloxane-Based Reinforcement of Polysiloxanes: from Supramolecular Interactions to Nanoparticles
Polysiloxanes represent a unique class of synthetic polymers, employing a completely inorganic backbone structure comprised of repeating –(Si–O)n– 'siloxane' main chain linkages. This results in an assortment of diverse properties exclusive to the siloxane bond that clearly distinguish them from …
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