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 15 of 15 for “"layered silicates"”.
-
Hybrids Based on Layered Silicates
… synthesized based on combinations of various layered silicates as inorganic core and well-defined polymer chains as a shell. In all cases positively charged 2-(dimethylamino)ethyl methacrylate (DMAEMA) was incorporated into the polymeric structure to serve as a firm anchor onto the negatively …
-
Microporous Organically Pillared Layered Silicates (MOPS) with tunable Functionality
… sogenannte „Microporous Organically Pillared Layered Silicates“ (MOPS), die Klasse der mikroporösen Materialien. Die Bezeichnung „Pillared Interlayered Clays (PILCs)“ wird in der Literatur leider nicht nur für tatsächlich gepillarte, mikroporöse Materialien verwendet, sondern zum Teil auch für …
-
Towards Mechanical Reinforcement in Polymer Layered Silicates Nanocomposites of the Second Generation
… optimization of nanofillers based on synthetic layered silicates for preparation of nanocomposites with improved mechanical reinforcement. The mechanical characterization was done in collaboration with the Polymer Engineering Department at Bayreuth University in the frame work of SFB 840 …
-
Spectroscopic and catalytic investigations of transition metal complexes intercalated in layered silicates
… susceptibility have been used in the study of layered silicates. The oxidative coupling of phenols catalyzed by copper complexes intercalated into smectite clay minerals show that this type of reaction can be made very selective, due to the environment of the interlamellar layer of the clay …
-
Nanostructured thermoset resins and nanocomposites containing hyperbranched blockcopolyether liquid rubbers and organophilic layered silicates
… additives. Inorganic nanofillers derived from layered silicates as well as functional liquid polymers of various architectures were used alone or in combination to tailor different properties, such as thermal stability, toughness or stiffness. Emphasis was also laid on easy processability of …
-
Influence of presence of a heteroatom source on the synthesis of layered silicates - ilerite, magadiite and kenyaite
In dieser Arbeit wird die hydrothermale Synthese von Ilerite, Magadiit und Kenyait - in Anwesenheit einer Heteroatomquelle behandelt. Das Hauptziel der Studie war den Einfluss der oben genannten Verbindungen auf das entstehende Material und auch die Möglichkeit des isomorphen Ersatzes von Silizium …
-
Charge Interaction Effects in Epoxy with Cation Exchanged Montmorillonite Clay and Carbon Nanotubes.
… in nanoparticles such as montmorillonite layered silicates (MLS) and hybrid systems of MLS + carbon nanotubes was investigated in cured and uncured epoxy. Epoxy nanocomposites made with cation-exchanged montmorillonite clay were found to form agglomerates near a critical concentration. …
-
Structure property and deformation analysis of polypropylene montmorillonite nanocomposites.
… expandable smectites such as montmorillonite layered silicates (MLS) in polymer matrices have attracted extensive application interest. Numerous MLS concentrations have been used with no particular justification. Here, we investigate the effects of MLS dispersion within the matrix and on …
-
Atomistic simulations of octacyclopentyl polyhedral oligomeric silsesquioxane polyethylene nanocomposites
… 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 particles, and interactions between particle and …
-
Chain Extension of Polyamide-6 & Polyamide-6/Organoclay Nanocomposites. Control of thermal degradation of polyamide-6/organoclay nanocomposites during extrusion using a novel chain extender
… (PA-6) and organoclay (organically modified layered silicates) nanocomposites during melt compounding have been investigated. In this research, a novel chain extender (Joncryl ADR 3400) has been used to improve thermal stability of PA-6 and PA- 6/organoclay nanocomposites during melt …
-
Hierarchical layered-silicate-- lamellar triblock copolymer nanocomposites
The fundamental role of the layered-silicates in a styrene-butadiene-styrene triblock copolymer (SBS) as a function of layered-silicate dispersion during deformation was investigated. Predominantly immiscible composites of mixed morphology provided the initial proof that dramatic alteration of the …
-
Fabrication and light scattering study of multi-responsive nanostructured hydrogels and water-soluble polymers.
… the expandable smectic clay Na-montmorillonite layered silicates (Na-MLS). For Na-MLS concentrations ranging from 2.0 to 3.2 wt%, the composite gels have larger swelling ratio and stronger mechanical strength than those for a pure PNIPAM. The presence of Na-MLS does not affect the value of the …
-
Characterization and modeling of the barrier properties in nanostructured systems
… the diffusion of oxygen through polymer-layered silicates was modeled on a continuum scale with a CFD software, while the properties of n-alkanthiolate self assembled monolayers on gold were analyzed from a molecular point of view by means of a molecular dynamics algorithm. Modeling …
-
Entwicklung und Charakterisierung von Elastomerkompositen auf Basis neuerer mikro- und nanoskaliger Füllstoffe
In der Dissertation wurden Nanokomposite mit unterschiedlichen Kautschuken (HNBR, EPDM, MAH-g-EPDM) als Basismaterial sowie diversen modifizierten Schichtsilikaten als Füllstoff hergestellt und charakterisiert. Untersucht wurden die sich ausbildenden Strukturen bzw. die Morphologie (Aggregation, …
-
The Chemistry of Dimethacrylate-Styrene Networks and Development of Flame Retardant, Halogen-Free Fiber Reinforced Vinyl Ester Composites
… system investigated was a polycaprolactone layered silicate nanocomposite, which was prepared via intercalative polymerization. Transmission Electron Microscopy (TEM) and X-ray Diffraction (XRD) data indicated a mixed morphology of exfoliated and intercalated structures. The mechanical …