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 24 for “"thermoplastic polymer"”.
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Nanotube reinforced thermoplastic polymer matrix composites
… make nanotubes attractive reinforcements for polymer matrix composites. However, the structure that makes them desirable also causes highly anisotropic properties and limited reactivity with other materials. This thesis isolates these problems in two separate studies aimed at improving …
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Mechanochemical synthesis and evaluation of rubber-thermoplastic polymer blends
… reaction, could not be achieved, and the thermoplastic rubber produced was essentially a physical blend. The role of free-radical initiators such as benzoyl and dicumyl peroxide, on the behaviour of NR/PP(60/40) blends was investigated. It was shown that dicumyl peroxide was more effective …
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The investigation of acid/base interactions in the adhesion of carbon fibers to thermoplastic matrices
… adhesion 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 …
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Manufacture of aerospace-grade thermoset and thermoplastic composites via nanoengineered thermal processing
… microfiber reinforcement with thermoset and thermoplastic polymer matrices. With the increasing use of such composites, the need for energy-efficient, cost-effective methods to produce composite structures is desired. Traditional curing processes such as autoclaves and ovens rely on …
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Multicomponent network and linear polymer systems: thermal and morphological characterization
Materials comprising of two or more polymeric components have achieved considerable technological significance in the last decade or so due to the unique properties often not attainable in their homopolymeric counterparts. In the present work, two such systemsone involving modified thermosets and …
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Development and Analysis of a Minimally Invasive Post-Infarction Epicardial Patch Delivery Device
… and inflatable sleeve prototyped using thermoplastic polymer films and casted silicone rubber components, designed for minimally invasive subxiphoid surgery. It utilizes vacuum for stabilization during application. By characterizing the material properties with a universe mechanical …
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A Study of Processing-Structure-Property Correlations in Novel Inorganic Phosphate Glass/Polyamide 66 Hybrid Materials with Enhanced Benefits
<p>A new class of inorganic glass/organic polymer hybrid materials has been developed recently by using ultra low T<sub>g</sub> tin fluorophosphate glass (Pglass) to combine the advantages of classical polymer blends and composite materials without their disadvantages. One of the important …
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Design of a fast cycle time hot micro-embossing machine
… there will be a huge market for mass-produced polymer micro- devices. These devices include microfluidic "labs on a chip," micro-optical chips, and many others. Several techniques exist for producing micron-scale features in polymer materials. One of the most promising of these techniques is …
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The mechanics of strain-induced crystallization in poly(ethylene terephthalate)
Poly( ethylene terephthalate) (PET) is a thermoplastic polymer found in numerous commercial applications. PET exhibits the capability of undergoing strain-induced crystallization during processing, the result of which is increased stiffness and hardness as well as better dimensional stability. An …
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Sensing at nanostructures for agri-food and enviromental applications
… were fabricated by templating a flexible thermoplastic polymer against an aluminium drinks can followed by coating with a silver film, to produce a rough nanostructured metallic surface. SERS is used for both qualitative (molecular fingerprint) and quantitative detection of dye molecules …
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Condensation heat transfer on nanoengineered surfaces
… methods: solvent-induced crystallization of a thermoplastic polymer, and anodic oxidation of aluminum. Although the polymer surface as not able to withstand the high temperatures seen during condensation, the applicability of the anodized metal surface to dropwise condensation was further …
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Effect of intermediate solvents on poly(ether ether ketone)
… Diffusion of both solvents through the polymeric film took place in the first third of the equilibrium time, while swelling occurred in the remaining time. The mechanical properties of all solvent-exposed PEEK films were tested by three types of experiment (i.e., glass cone technique, …
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The preparation and characterization of PEK/TEOS glasses by the sol-gel method
… processes. As a result of this last possibility, polymer researchers have sought to develop spin-off hybrid inorganic-organic network systems that can be prepared by the sol-gel method using reactively functionalized oligomers and/or monomers along with the metal alkoxide precursors. These types …
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Cellulose fiber-reinforced thermoplastic composites: surface and adhesion characterization
… the adhesion between wood fibers and thermoplastics. Direct applications include the development of better wood fiber composites and better paper coatings. The objectives of the study were two-fold. First, to quantify the effects of surface treatments on the surface properties, and, …
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Nanomaterial-Enabled Out-of-Autoclave and Out-of-Oven Manufacturing of Fiber Reinforced Polymer Composites
Fiber reinforced polymer composite materials have been a staple of the aerospace industry, integral to creating lightweight flight vehicles due to their high specific material properties. These materials often come in a prepreg form, where microfibers are pre-impregnated with a polymer matrix to …
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Synthesis and Characterization of Wholly Aromatic Semicrystalline Polyimides Based Upon Bis(4-Aminophenoxy) Benzenes
Semicrystalline thermoplastic polyimides based upon bis(4-aminophenoxy)benzene and related "triphenyl ether" diamines were synthesized via the classical two step amic acid route. More specifically, polyimides were derived from para linked 1,4-bis(4-aminophenoxy)benzene, or TPEQ (triphenyl ether …
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Poly(o-methoxyaniline): Synthesis, Doping and Composites
Intrinsically conducting polymer (ICP) composites, especially ICP/thermoplastic polymer composites have recently received great attention because of their potential synergistic benefits and promising applications in a variety of fields. Yet the fabrication of ICP/thermoplastic composites remains a …
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Thermal regulation of vascularized fiber-reinforced polymer matrix composites
Fiber reinforced polymer matrix composites (PMC) possess outstanding structural properties, including high strength and stiffness, low weight, long fatigue life, and excellent manufacturability of complex geometries. However, their application is still limited where high temperature service is …
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Experimental and Numerical Explorations of Fire Performance of Intumescent Thermoplastic Composites for Electric Vehicle Battery Enclosures
… flame-retarded polypropylene (FR-PP) thermoplastic composites, each reinforced with 30% discontinuous glass fibers with differing fiber length and FR content. These systems are candidates for next-generation plastic EV battery enclosures. Understanding the fire performance of Li-ion …
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Synthesis and Characterization of a Novel Polyacetal & Design and Preparation of Superhydrophobic Photocatalytic Surfaces
<p>Polyacetal polymers are thermoplastic resins that play an important role in industry because of numerous industrial applications including automobile; household appliance; <em>etc</em>. The first part of this thesis (Chapter 2) is about the synthesis of a new acetal copolymer that exhibits …
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