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 49 for “"coupling agent"”.
-
Elucidation of the structure of silane coupling agent films formed on metal surface
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1979.
-
Coupling Agent-Based Models with Bayesian Belief Networks in Social-Ecological Systems Modeling: The Role of Uncertainty in the Resilience of Semi-Arid Riparian Corridors in the Sonoran Desert
Resiliency, or the ability of ecosystems to absorb change, is a particularly challenging goal for systems with a high interconnectivity of their social and ecological sub-systems, dubbed social-ecological systems. Exploring potential effects of policy decisions and/or changes in climate are …
-
Investigation of the characteristics of kenaf fibre reinforced polypropylene composites
… moulding. The effects of fibre content, coupling agent content (MAPP), different types of moulding processes and addition of filler materials (kenaf core) were observed through mechanical, thermal and microscopic testing.
-
The effect of chemical treatment, fibre length, fibre content and injection moulding parameters to uv irradiation resistance of oil palm fibre reinforced composites
… fibre length, fibre content, fibre treatment, coupling agent and injection moulding parameter to ultraviolet (UV) light resistance of this composite and also the optimum setting of them were investigated. The UV resistance was examined via the change of mechanical properties after UV exposured …
-
Design of Improved Ceramic/polymeric Composites
… the design, fabrication, and evaluation of a new coupling agent for glass fiber/epoxy matrix composites. This interface consisted of a thin coating of activated carbon (ACI) with high surface area to take advantage of mechanical interlocking. Furthermore, the surface chemistry was modified to …
-
A study of structure-property relationships in certain polymeric dental materials
… pressure, material condition, crosslinking agent concentration, concentration of BisGMA/THFMA, monomer:<br/>polymer ratio, and the initiator concentration. It was found that some of these variables and their interactions affected the properties of the polymer produced to varying …
-
Synthesis of Water Soluble Quantum Dots and their Application for Enzymatic Activity Measurements
… peptides, not for all kind of peptides. The co-coupling peptide and PEG on QDs, has good water-solubility when the quantity of PEG and coupling agent EDAC are controlled. The enzymatic activities based on QDs FRET system at different environments was demonstrated and the results show that pH …
-
The Improvement of Interfacial Bonding, Weathering and Recycling of Wood Fibre Reinforced Polypropylene Composites
… 3 and 4 wt% maleated polypropylene (MAPP) as a coupling agent. A fibre content of 50 wt% with 3 wt% MAPP was found to be optimum. Alkali treatment of fibre was carried out to improve the interfacial bonding. After treatment, fibre surface charge was found to increase, but single fibre tensile …
-
Synthesis and characterization of polyamidoamine dendrons
… that would serve as a coupling agent. Afterwards, the cleavage of the solid-phase synthesized full generation PAMAM dendrons had been done to perform structural analysis including determination of synthesis defects. The cleavage is considered a very important part of the …
-
Synthesis of Novel 5-Aryl 2’-Deoxyuridine and 2’-Deoxycytidine Analogues
… of the nucleobase via a Suzuki-Miyaura cross-coupling reaction, yielding 5-phenyl-2’-deoxyuridine (5-PdU). After that, modification of the obtained 5-PdU at the C4 position was performed with benzotriazole-1-yl-oxy-tris-(dimethylamino)-phosphonium hexafluorophosphate (BOP, a peptide-coupling …
-
Environmentally friendly hybrid coatings for corrosion protection: silane based pre-treatments and nanostructured waterborne coatings
… the effectiveness of the sol-gel coatings as coupling agent between metallic substrates and organic coatings (paints) both a powder coating paint and a cataphoretic coating paint were applied on the silane pre-treated substrates. The electrochemical measurements and the accelerated tests …
-
Synthesis of 4-Azidocoumarins and Their Use in Copper-Catalyzed Azide-Alkyne Cycloaddition reactions
… coumarins by reaction with the peptide coupling agent (benzotriazol-1-yloxy)tris-(dimethylamino)phosphonium hexafluorophosphate (BOP), and 1,8-diazabicycloundec-7-ene (DBU) as the base, in tetrahydrofuran (THF) solvent. The 4-benzotriazolyloxy coumarins were converted to the …
-
The mechanochemical modification of polyolefins using reactive modifier systems
… bond between the bound modifier and the silane coupling agent on the surface of the glass. Two silane coupling agents were evaluated these had a aliphatic chloro group and an aliphatic amino group respectively available for reaction with the modifier. The modifiers synthesised for this work had …
-
Development of polymer bonded magnets with enhanced magneto-mechanical properties for high temperature and aggressive environments
… the Nd-Fe-B powders with a suitable silane coupling agent prior to blending with the polymer and subsequent molding of the composite. The coated rare earth powders are ready for injection molding when highly packed and the coating is capable of withstanding mechanical shearing during the …
-
Solid-supported synthesis of peptidoglycan fragments and their biological evaluation
… of (R)-S2d is described that makes use of the coupling agent T3P. A chromatographic method is proposed to evaluate the degree of thioester racemization. The kinetics of the interaction between the thioester and different PBPs were studied and a protocol for microtiter plate-based assays is …
-
The development of chemically engineered pullulan for drug delivery
… second step involved the medication of CMP by coupling different amine functionalized molecules onto the carboxylic groups of CMP, using the coupling agent dicyclohexylcarbodiimide. The amines used in this modification step were: hexadecylamine, decylamine, cadaverine (1-5 diaminopentane), and …
-
Performance of Hemp-Fibre Reinforced Polypropylene Composite Materials
… a maleic anhydride modified polypropylene (MAPP) coupling agent were compounded in a twin-screw extruder, and injection moulded into composite tensile test specimens. A range of composites with different fibre and MAPP contents were produced and tested. Tensile tests revealed that the optimum …
-
Development of synthetic fiber-based reinforcements for thermoplastics as alternative to steel-based analogs for industrial applications
… roughened the surface. When coated with a silane coupling agent, this electrolytically modified carbon fiber (with sulphuric acid electrolyte) increased 39 % in load-bearing capacity against raw carbon/TPU.
-
Profile extrusion of wood plastic cellular composites and formulation evaluation using compression molding
… together with maleated polyethylene (MAPE) coupling agent to investigate their effects on WPC processing and mechanical properties. Work has been done to redesign the extrusion system setup to achieve smoother and stronger profiles. A guiding shaper, submerged in the water, has been designed …
Page 1 of 3