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Showing 1 to 20 of 25 for “"silsesquioxanes"”.
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Novel materials based on functionalised silsesquioxanes
The functionalisation of silsesquioxanes results in materials with novel physical properties. A series of compounds has been coupled with silsesquioxanes [HSiO<sub>3/2</sub>]<sub>8</sub> and [SiO<sub>3/2</sub>]<sub>8</sub> [OSi(CH<sub>3</sub>)<sub>2</sub>H]<sub>8</sub> and the properties of the …
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Characterisation of Silsesquioxane-Poly(Methyl Methacrylate) blends
Silsesquioxanes are a novel hybrid material that have advantageous properties intermediate of polymers and ceramics, due to their inorganic-organic molecular structure. Current research has focused on the potential of this hybrid to enhance conventional materials. Through the incorporation of …
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Polycondensation of Bridged Amino-Functionalized Trialkoxysilanes.
… resolve global warming predicament. Mesoporous silsesquioxanes, which stabilized by organobridges and has high content aminon absorption site, can serve as a potential CO<sub>2</sub> adsorbent. Synthesis of such material is done by hydrolysis and polycondensation of trialkoxysilane. The fastest …
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Phase and Rheological Behavior of Langmuir Films at the Air/Water Interface: Polyhederal Oligomeric Silsesquioxanes (POSS), POSS/Polymer Blends, and Magnetic Nanoparticles
For over a century, Langmuir films have served as excellent two-dimensional model systems for studying the conformation and ordering of amphiphilic molecules at the air/water (A/W) interface. With the equipment of Wilhelmy plate technique, Brewster angle microscopy (BAM), and surface light …
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Mesoporous Functionalized Materials for Post-Combustion Carbon Dioxide Capture.
… absence of an inorganic linker, obtained bridged silsesquioxanes had mesoporous structure. A material prepared in the presence of dodecylamine as a template had higher surface area and narrow pore size distribution while the use of sodium dodecylbenzene sulfate resulted in formation of mesopores …
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Inorganic/organic hybrid polymers
… silicas; the preparation of vinyl containing silsesquioxanes based on the hydrolysis of cyclohexyltrichlorosilane or propylmethacrylatepolysiloxane; the synthesis of latexes by co-polymerisation of either N-Isopropylacrylamide (NIPAM) or styrene with vinyltrimethoxysilane and the intercalation …
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Rate-dependent deformation behavior of poss-filled and plasticized poly(vinyl chloride)
… This study focuses on polyhedral oligomeric silsesquioxanes (POSS) enhanced polymeric systems. POSS are hybrid organic-inorganic nano-scale molecules which consist of a silica cage with functional groups attached to the cage comers. Various binary and ternary polymer blends were produced by …
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Novel chiral liquid crystal organic-inorganic hybrid nanoparticle systems : Design, synthesis and investigation
… based materials were then attached to silsesquioxanes. Both materials have low melting points and low transition temperatures. Phase diagrams, contact and miscibility experiments were performed in order to explain a more complicated cholesteric phase behaviour. The cholesteric mesogens …
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Design and investigation of novel photoactive liquid crystalline organic-inorganic hybrids
… of novel photoactive liquid crystalline silsesquioxanes. The investigations carried out include the initial design, chemical synthesis and characterization, photochemical properties, liquid crystalline behaviour and optical properties.The new materials were carefully designed in order to …
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Synthesis and Characterization of Polyhedral Oligomeric Silsesquioxane (POSS) Based Amphiphiles
Polyhedral oligomeric silsesquioxanes (POSS) have attracted substantial academic interest for many years as hybrid materials and nanofillers for controlling thermal and mechanical properties, and for providing thermal and chemical resistance while retaining ease of processing. A natural extension …
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Synthesis and Characterization of Polyhedral Oligomeric Silsesquioxane (POSS) Based Amphiphiles
Polyhedral oligomeric silsesquioxanes (POSS) have attracted substantial academic interest for many years as hybrid materials and nanofillers for controlling thermal and mechanical properties, and providing thermal and chemical resistance while retaining ease of processing. A natural extension of …
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Surface Characterization of Siloxane, Silsesquioxane, and Maleic Anhydride Containing Polymers at Air/Liquid Interfaces
… the phase behavior of polyhedral oligomeric silsesquioxanes (POSS) was examined using a combination of LB and Brewster angle microscopy (BAM).Polymer fillers have been shown to reduce the cost and often improve the properties of high performance polymer composites. The utility of POSS as a …
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Fabrication and Dynamic Tuning of Periodic Structures From Holographic Lithography
… cyclohexyl polyhedral oligomeric silsesquioxanes (epoxy-POSS). The nano-roughness was generated due to microphase separation of the polymer chain segments in nonsolvents during rinsing, which could be tuned by crosslinking density of the polymer and choice of solvents. Such …
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Interfacial Characterization of Polyhedral Oligomeric Silsesquioxane (POSS) Amphiphiles and Polymer Blends: Thermodynamics, Morphology, and Rheology
… one class of oligomers, polyhedral oligomeric silsesquioxanes (POSS), has attracted considerable attention because of their unique hybrid organic/inorganic molecular structures and nanoscopic sizes. While surface and interfacial properties may play a key role in many potential POSS …
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Cysteine(2-), alkyl, and siloxide complexes of ruthenium(VI) and iron(III)
… and triethylamine gives the iron-containing silsesquioxanes (NBu$\sb4$) ((C$\sb5$H$\sb9)\sb7$Si$\sb7$O$\sb{12}$FeCl) and (NBu$\sb4$) ((C$\sb5$H$\sb9)\sb7$Si$\sb7$O$\sb{12}$FeOSi(CH$\sb3)\sb3$) in yields of at least 60% after recrystallization from toluene/hexane. These complexes can be …
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Synthesis and characterization of "non-shrinking" nanocomposites for dental applications
The aim of this study was to design and develop novel low shrinkage nanocomposites based on SSQ (Polyhedral Silsesquioxane) for dental applications. SSQ based nanocomposites with various types of methacrylate and/or epoxide functionalities were synthesized based on inexpensive starting materials. …
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Design and Characterisation of Hybrid Organic-Inorganic Materials for Luminescence Downshifting Devices
Spectral converters can enhance the performance of photovoltaic devices by converting incident sunlight into wavelengths that better match the spectral response of an attached PV cell, for example by converting UV to visible light through luminescence downshifting. Downshifting devices typically …
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