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Showing 1 to 14 of 14 for “"silicone elastomers"”.
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Synthesis and radiation stability of silicone elastomers.
A wide range of polymer samples based upon polydimethylsiloxane (PDMS) have been subject to gamma irradiation, and the subsequent effects analysed using a variety of techniques. The preparation of a series of blends and block copolymers of PDMS containing small amounts of polystyrene (PS) is …
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Novel Shear-Thinning of Aged PDMS/Fumed Silica Admixtures and Properties of Related Silicone Elastomers
… has long been used to structurally reinforce silicone elastomers. Unfortunately, the combination of as little as a few weight percent of untreated fumed silica nanoparticles [uFSN] with a siloxane polymer, such as PDMS, forms a difficult to process waxy solid admixture that even long periods …
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Optimization of antimicrobial chitosan coating for silicone
… antimicrobial coatings, based on chitosan, for silicone elastomers, a common material in implants and other medical devices. Chitosan is a natural amino polysaccharide that is both antimicrobial and biocompatible.
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Optimisation of silicone-based dielectric elastomer transducers by means of block copolymers – synthesis and compounding
… robust human muscle. In this regard, dielectric elastomers have been studied. Their actuation occurs when Maxwell stress exceeds elastic stress in the presence of an electrical field, resulting in contraction in thickness and planar expansion in the area. As well as an actuator, dielectric …
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The Development of Facial Prosthetics and Adhesives in Plastic and Reconstructive Surgery. A study in the application of prosthetic materials and devices used in plastic and reconstructive surgery together with tissue adhesives as an alternative to conventional ligation.
Various silicone elastomers have been evaluated for use in the prosthetic reconstruction of facial defects. Their strength, texture, flexibility, hardness, ease of preparation, pigment receptivity and retention, and their resistance to cleaning were compared and the data consulted when an elastomer …
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Effects of Atomic Oxygen on Outgassing of Silicone Materials
… how atomic oxygen affects outgassing of silicones, which are of interest as atomic oxygen can alter the chemical composition of the surface of silicones. CV-2500, CV2-2289- 1, and SCV2-2590, three silicone elastomers that are products of NuSil Technology LLC, were tested. Significant …
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Qualifizierung von Polysiloxanen für die langzeitstabile Konditionierung radioaktiver Abfälle
… to higher standards for storage containers. Silicone elastomers (polysiloxanes), materials on the basis of silicon and oxygen with organic substituents, have various physical and chemical properties and seem to be suitable for the long-term storage of low- and intermediate-level radioactive …
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Left Ventricle Assist Device
… readings. The team experimented with various silicone elastomers and a urethane-based material, ClearFlex 30, to create a transparent phantom. The report highlights the importance of surface roughness for optical clarity, with an average surface roughness of 0.186 μ being ideal for optimal …
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Improving hydrophilicity of silicone elastomer by IPN formation with hyaluronan
… the most popular form on the market today is the silicone hydrogel, with nearly 70% of the market share. However, many contact lens wearers still have issues which cause them to discontinue lens use. It is estimated that between 25-35% of people discontinue use permanently. This can be traced back …
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Structure-property relationships in segmented copolymers
… and were found to be superior to the unfilled silicone elastomers. The final materials were used as reasonable models for investigating various methods for determining the interfacial layer thickness between the hard and soft phase. Specifically, due to the fact that there is no hard segment …
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Development of 'In vitro' intestinal models to study the pharmacology of drugs affecting the gastrointestinal tract in normal and diseased conditions. Development of a cell culture model for intestinal pharmacology.
… drugs on ISMC, which were plated onto glass and silicone elastomer substrate. The cultured ISMC responded to the application of drugs such as potassium chloride (KCl), carbachol, 5-HT and noradrenaline (NA). Large population of cocultures seeded onto silicone elastomers or cholesteric liquid …
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Development of 'In vitro' intestinal models to study the pharmacology of drugs affecting the gastrointestinal tract in normal and diseased conditions. Development of a cell culture model for intestinal pharmacology.
… drugs on ISMC, which were plated onto glass and silicone elastomer substrate. The cultured ISMC responded to the application of drugs such as potassium chloride (KCl), carbachol, 5-HT and noradrenaline (NA). Large population of cocultures seeded onto silicone elastomers or cholesteric liquid …
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Thermal Stability of Al₂O₃/Silicone Composites as High-Temperature Encapsulants
… of this study. The evaluation revealed that silicone elastomers are processable for various types of package structure and exhibit excellent dielectric performance in a wide temperature range (25 - 250°C) but are insufficiently stable against long-term aging (used by some manufacturers, e.g., …
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Modifizierung von Silikonelastomeren mit organischen Dipolen für Dielektrische Elastomer Aktuatoren
… - insbesondere des verwendeten Elastomers - erforderlich. Um dies zu erreichen, können die dielektrischen Eigenschaften (Permittivität) der Elastomere gesteigert und/oder deren Steifigkeit (Young-Modul) gesenkt werden. In der vorliegenden Arbeit konnte die Aktuationsleistung von …