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.
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Showing 1 to 20 of 45 for “"polymer surfaces"”.
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Pseudofluorination of polymer surfaces using freon gases
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1984.
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Crystallization of calcium oxalate on molecularly imprinted polymer surfaces
… and COD respectively) were used to imprint a copolymer of 6-methacrylamidohexanoic acid and divinylbenzene.
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Molecular order at polymer surfaces via X-ray photoelectron spectroscopy
Molecular order in surfaces is probed for several different repeat unit Spectroscopy (XPS) is chemistries. X-ray Photoelectron used, particularly with angular dependence, to obtain the compositional gradient information from the top 6 run of the surface. It is found that all materials investigated …
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Micro-patterned plasma and ultra-violet ozone modification of polymer surfaces.
… deposition/modification are traditionally non-polymerizable through conventional polymerization mechanisms i.e. they do not contain unsaturated bonds. The deposition conditions identified and used in this study were specifically chosen to minimize precursor fragmentation and rearrangement and …
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Modification of polymer surfaces to aid the attachment of cells derived from bone.
Polymeric materials such as polystyrene (PS) and ultra high molecular weight polyethylene (PE) have bulk properties which are attractive for biomaterials applications such as orthopaedic implants. However, both PS and PE have low surface energy, and it is well established that high-energy surfaces …
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Characterization of the molecular structure at modified polymer surfaces and polyphenylene sulfide/copper interphases
The interphase region at modified polymer surfaces or at polymer\ metal interfaces may be critical in determining the strength and durability in adhesive applications. Methods to investigate these regions are limited however and this research has focused on the use of infrared reflection absorption …
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Study of the phase behavior of poly(n-alkyl methacrylate-b-methyl methacrylate) diblock copolymers and its influence on the wettability of polymer surfaces
… methacrylate-b-methyl methacrylate) diblock copolymers and its influence on the wettability of the polymer surfaces were carried out. For this investigation two polymethacrylic systems differing only in the alkyl rest of one block: poly(pentyl methacrylate-b-methyl methacrylate) and poly(propyl …
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Colloid phenomena in surface-modified polymer systems.
… and application of techniques to study modified polymer surfaces. Scanning probe microscopy (SPM) is used throughout this work as an experimental platform for the development of advanced techniques for the characterisation of polymer surfaces and adsorbed protein layers. A new method for the …
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Synergistic Environmental Aging of Glass Reinforced Polymer Composites
… environmental degradation of Glass Reinforced Polymer (GRP) composites were examined and a novel synergistic aging model was proposed in this study. Six GRPs based on glass fibers with four different polymer resins and six pure polymer thermoplastic resins were exposed either individually or in …
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Templated growth of platinum nanostructures
… by templating the growth of platinum on treated polymer surfaces and within disk-like aqueous bicellar assemblies. The growth mechanisms of all structures were examined in detail. Platinum hollow nanospheres with uniform shell thickness were prepared by the seeded growth of platinum on the …
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Utilizing Hybrid Plasmon Modes to Probe Nanoparticle-Polymer Interfaces
Nanoparticle-polymer composite materials have widespread applications in fields such as: sensing, electronics, and biology, due to their desirable physical properties. However, many fabrication techniques render little control over nanoparticle incorporation, and homogeneity of the resulting …
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In Vivo Studies of the Foreign Body Reaction to Biomedical Polymers
… in immunodeficient mice strains. Analysis on polymer surfaces using quantitative calculations such as percent fusion, cell density, and nuclei density described the development of foreign body reaction on biomaterial surface. In addition qualitative assessment was implemented to also describe …
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The investigation of acid/base interactions in the adhesion of carbon fibers to thermoplastic matrices
… of reinforcing carbon fibers to thermoplastic polymer matrices. Inverse gas chromatography (IGC) and x-ray photoelectron spectroscopy (XPS) were used to characterize the acid/base nature of the carbon fiber surfaces. Capillary column IGC (CIGC) was used to determine the acid/base nature of …
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Crack Healing in Polymers (Fracture, Reptation, Tack)
… development associated with the healing of polymer-polymer interfaces was studied using theoretical and experimental approaches. The healing of crazes in atactic polystyrene (PS) and microvoids in styrene-isoprene-styrene block copolymers was described phenomenologically, from dark-field …
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Synthesis of Well-Defined Multi-End Functionalized Polymers via Living Anionic Polymerization
… applications require specific properties at polymer surfaces that differ from the bulk, while retaining the advantageous properties of the bulk polymer. In this thesis, we describe work aimed at producing a series of multi-end functionalized polystyrene and polyisoprene additives with a wide …
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Formaldehyde mass-transfer properties study
… and the recently developed formaldehyde polymerization theory. The procedures and methods for analyzing and measuring formaldehyde mass-transfer characteristics were developed in an effort to minimize experimental variability and were strictly followed during the research. The …
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Advancing fast relaxation imaging to determine protein stability and folding kinetics on poly(n-isopropyl acrylamide) films
… have reported the use of the thermo-responsive polymer PNIPAM to capture and release cells or proteins for medical purposes; however, this assumes that PNIPAM does not perturb the stability of biomolecules. Previous analytical and spectroscopic techniques have not been able to confirm this …
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A 'Toolkit' of Small Molecules for Polymer Assembly and Post-Synthetic Modification Using 'Click' and Photoactive Chemistries
… toward the goals of constructing and modifying polymeric materials according to simple, generalizeable, and universal processes. The prepared compounds rely upon a combination of photochemistry and the 'click' philosophy to alter the architecture, bulk properties, or surface chemistry of …
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Characterization of thin silicone films formed by migration across defined polymer substrates
… treatments of liquid spreading on solid surfaces can be found in abundance in the literature, relatively few experimental studies have been performed. This study focused on the experimental detection of polydimethylsiloxane spreading on polymer surfaces in the spreading regime where …
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The applications of comb polymer to the study of liver cell adhesion and signaling
Comb polymer, which consists of a hydrophobic poly(methyl methacrylate) (PMMA) backbone with hydrophilic hydroxy-poly(ethylene oxide) (HPOEM) side chains, is a tool that has many possible applications for the study of liver cell adhesion and signaling. This polymer has the unique properties of …
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