NDLTD logo NDLTD Union Catalog and Global ETD Search

Global ETD Search

Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.

Results

Showing 1 to 20 of 22 for “"polyhedral oligomeric silsesquioxane"”.

  1. Atomistic simulations of octacyclopentyl polyhedral oligomeric silsesquioxane polyethylene nanocomposites

    Capaldi, Franco Mario, 1977-Massachusetts Institute of Technology2005

    … Nanoscopic fillers such as carbon nanotubes, polyhedral oligomeric silsesquioxane (POSS), and layered silicates have already been successfully used to improve the thermal and mechanical properties of polymers. On this length scale, details describing particle organization, interaction between …

    mit Repository record

  2. Synthesis and Characterization of Polyhedral Oligomeric Silsesquioxane (POSS) Based Amphiphiles

    Liu, YangVirginia Tech2011

    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 …

    vt Repository record

  3. Synthesis and Characterization of Polyhedral Oligomeric Silsesquioxane (POSS) Based Amphiphiles

    Liu, YangVirginia Tech2010

    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 …

    vt Repository record

  4. Interfacial Characterization of Polyhedral Oligomeric Silsesquioxane (POSS) Amphiphiles and Polymer Blends: Thermodynamics, Morphology, and Rheology

    Deng, JianjunVirginia Tech2005

    Over the past two decades 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 …

    vt Repository record

  5. Structure and Dynamics of Polyhedral Oligomeric Silsesquioxane (POSS) and Poly(Ethylene Glycol) (PEG) Based Amphiphiles as Langmuir Monolayers at the Air/Water Interface

    Lee, WoojinVirginia Tech2008

    … (POSS-PEG-POSS) and hemi-telechelic (POSS-PEG) polyhedral oligomeric silsesquioxane (POSS) derivatives of PEG. PEO with number average molar mass, Mn > ~ 18 kg·mol-1 form stable spread Langmuir films at the A/W interface, while oligomeric PEG have ï -A isotherms that deviate from high molar mass …

    vt Repository record

  6. Optimization Problems in Hilbert Space with POSS Complexes.

    Corn, John Russell2011

    … and <em>T</em><sub>12</sub> polyhedral oligomeric silsesquioxane (POSS) cage molecules. Second-quantized methods motivate the derivations throughout.</p>

    etsu Repository record

  7. Rheological and morphological characterization of hierarchically nanostructured materials

    Wang, Benjamin Ning-HawMassachusetts Institute of Technology2007

    … nanostructured materials based on "O-D" polyhedral oligomeric silsesquioxane (POSS) particles, "l-D" carbon nanotubes (CNTs), and "2-D" clay nanoparticles. We develop a technique, using small-angle X-ray scattering, which provides quantitative measurements of the morphological …

    mit Repository record

  8. Thermomechanical properties of polyhedral oligomeric silsequioxane- poly(methyl methacrylate) nanocomposites

    Kopesky, Edward ThomasMassachusetts Institute of Technology2005

    Poly(methyl methacrylate)s (PMMA) containing polyhedral oligomeric silsesquioxane (POSS) nanoparticles (d [approx.] 1.5 nm) were subjected to heological, mechanical, and morphological tests to determine the effects that POSS has on the melt-state and solid-state properties of this commercially …

    mit Repository record

  9. The Effect of POSS Modified Montmorillonite On Elastomer Nanocomposites

    Lewis, Elana Celeste2018

    … performance in clay/rubber nanocomposites when polyhedral oligomeric silsesquioxane (POSS) is used as a dispersant. POSS has been shown previously to enhance clay, metal oxides, and carbon nanotube dispersion in thermoplastics matrices, but their performance in rubber systems has not yet been …

    usm Repository record

  10. Structure/Property/Processing Relationships in Poss-Modified High Temperature Thermoplastic Composites

    Woellner, Mitchell

    … that nano-structured processing aids such as polyhedral oligomeric silsesquioxane (POSS) can significantly improve the processability of said thermoplastics at low percent loadings. However, as with any additive, maintaining molecular dispersion of the additives throughout the polymer matrix …

    usm Repository record

  11. The Reactivity of Chemical Warfare Agent Simulants on Carbamate Functionalized Monolayers and Ordered Silsesquioxane Films

    McPherson, Melinda KayVirginia Tech2005

    … linkages. In addition, novel trisilanolphenyl-polyhedral oligomeric silsesquioxane (POSS) molecules were used to create Langmuir-Blodgett films containing reactive silanol groups that have potential use as sensors and coatings. The uptake and reactivity of organophosphonates and …

    vt Repository record

  12. Well-defined molecular brushes: Synthesis by a "grafting through" strategy and self assembly into complicated hierarchical nanostructures

    Li, Zhou2010

    … polylactide, poly(ethylene glycol) and polyhedral oligomeric silsesquioxane: POSS). The high versatility of our strategy is also used to increase the complexity of the resulting molecular brushes, by introducing block structures to either backbone or side chains, using the "livingness" …

    wustl Repository record

  13. Optical and thermal characteristics of thin polymer and polhedral oligomeric silsesquioxane (POSS) filled polymer films

    Karabiyik, UfukVirginia Tech2008

    … stresses that remain from film preparation. Polyhedral oligomeric silsesquioxane (POSS) derivatives may be useful as a nanofiller in nanocomposite formulations to enhance thermal properties. As a model system, thin films of trisilanolphenyl-POSS (TPP) and two different molar mass PtBA were …

    vt Repository record

  14. Transparent Omniphobic Coatings that are Flexible and Wear Resistant

    Zhang, Kaka2019

    … of the epoxide rings of glycidyloxypropyl polyhedral oligomeric silsesquioxane (GPOSS). While the desired hardness is rendered by the silica core of GPOSS, the flexibility is imparted by the glycidyloxypropyl network. In addition, oil and water repellency is achieved without adversely …

    queens Repository record

  15. Phase and Rheological Behavior of Langmuir Films at the Air/Water Interface: Polyhederal Oligomeric Silsesquioxanes (POSS), POSS/Polymer Blends, and Magnetic Nanoparticles

    Yin, WenVirginia Tech2009

    … are employed to examine Langmuir films of polyhedral oligomeric silsesquioxane (POSS), polymer blends, and magnetic nanoparticles (MNPs). In a first time, SLS is employed to study POSS molecules. The interfacial rheological properties of trisilanolisobutyl-POSS (TiBuP) indicate that TiBuP …

    vt Repository record

  16. Functional Cylindrical Polymer Brushes and Their Hybrids with Inorganic Nanoparticles

    Xu, YouyongUniversität Bayreuth

    … inorganic nanoparticles such as magnetite and polyhedral oligomeric silsesquioxane (POSS) were fabricated through non-covalent inclusion and covalent attachment respectively. Double-grafted poly(lauryl methacrylate) brushes carry side-chains containing dodecyl short grafts. The long alkyl …

    bayreuth Repository record

  17. Stability and Morphological Evolution in Polymer/Nanoparticle Bilayers and Blends Confined to Thin Film Geometries

    Paul, RituparnaVirginia Tech2007

    … acrylate) (PtBA) or polystyrene (PS) and a polyhedral oligomeric silsesquioxane (POSS), trisilanolphenyl-POSS (TPP) is explored at elevated temperatures. The results demonstrate unique dewetting morphologies in both PtBA/TPP and PS/TPP bilayers that are significantly different from those …

    vt Repository record

  18. HIGH MODULI POLYMER GELS AND NON-AQUEOUS ELECTROLYTES WITH MUTLI-IONIC LITHIUM SALTS HAVING HIGH THERMAL STABILITY AND LITHIUM ION TRANSFERENCE NUMBERS

    CHEREDDY, SUMANTHTemple University. Libraries2020

    … approach a functionalized symmetric, multi-ionic polyhedral oligomeric silsesquioxane (POSS) with dissociative lithium salt (POSS-(LiNSO2CF3)8 ) salt was dissolved in tetraglyme (G4), CH3–O–(CH2CH2O)4–CH3 in a specific O/Li ratio and the solution mixture was used as a electrolyte. Good ionic …

    temple Repository record

  19. Design and Characterisation of Hybrid Organic-Inorganic Materials for Luminescence Downshifting Devices

    Tunstall García, HelenUniversity of Cambridge2024

    … methacrylate organic polymer and octaglycidyl polyhedral oligomeric silsesquioxane (POSS) nanoparticles are investigated. POSS nanoparticles consist of a silica-based nanocage with highly tunable organic substituents on each Si vertex, and their organic polymer composites have previously …

    cambridge Repository record

  20. Deformation induced molecular behavior of Cis 1,4-polyisoprene and its nanocomposites monitored by solid-state NMR

    Poliskie, Georgia Michelle, 1978-Massachusetts Institute of Technology2005

    … polyisoprene, polyisoprene-clay composites and polyhedral oligomeric silsesquioxane (POSS) nanofillers. The high frequency relaxations monitored by NMR are sensitivity to changes in the environment of polyisoprene chains as a function of compressive strain. These are the first experiments to use …

    mit Repository record

Page 1 of 2