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 21 for “"thermoplastic elastomer"”.
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Highly Tough, Stiff, and Transparent Poly(Methyl Methacrylate) Composites Incorporating Thermoplastic Elastomer Nanofibrils
… High aspect ratio nanofibrils of three different thermoplastic elastomers (i.e., thermoplastic polyester elastomer, polyether block amide, and thermoplastic polyurethane) are developed and incorporated into poly(methyl methacrylate) (PMMA) to fabricate polymer-polymer composites that are not only …
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Functional coatings deposited by an Atmospheric Pressure Plasma Jet (APPJ) system over Thermoplastic Elastomer (TPE) substrates
… materials that are used in these areas, like thermoplastic elastomers (TPEs), involve a high degree of friction. So, in order to decrease the friction coefficient of the TPE, companies are using techniques as flocking. However, its high energy consumption, irregular distribution of fibers, …
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Engineering effective fibrocartilage replacement technologies using nanostructure-driven replication of soft tissue biomechanics in thermoplastic elastomer hydrogels
… of compressive cycles. By relying only on simple thermoplastic processing to form these nanostructured networks, the synthetic complexities common to most solution-based hydrogel fabrication strategies are completely avoided. Described within this dissertation are a range of efforts, broadly …
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Development of a novel toner for electrophotography based additive manufacturing process.
… study of producing 3D objects by printing thermoplastic elastomer using electrophotography technique and thereafter sintering the whole layer using infrared light source .The term Selective laser printing (SLP) has been coined by the author for this new process. This thesis provides the …
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Photo-responsive liquid crystal block copolymers/
… has an impact on the field of functional elastomers in general. To produce a fast photo-response at room temperature, a new photo-responsive azobenzene nematic side chain (SC) LC polysiloxane was developed, characterized, and demonstrated to respond significantly, and reversibly from …
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Material Property Modeling of Ground Tire - Recycled Polymer - Natural Fiber Composite
Composites made of thermoplastic with ground tire rubber (GTR) have attracted increasing interest as recycled rubber with reclaimed polymer offer advantages of better tensile properties, better toughness, low energy requirement for molding, more economical, and provides an opportunity to add value …
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Preparation and mechanical properties of nylon 6-graphene nanocomposites
… and graphene oxide (GO), toughening agent like thermoplastic elastomer and compatibilizer were used for the preparation of nanocomposites. An important objective of this work was to control and enhance the dispersion of graphene based nanoparticles and overcome the agglomeration and its adverse …
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Micro and nano composites composed of a polymer matrix and a metal disperse phase.
Low density polyethylene (LDPE) and Hytrel (a thermoplastic elastomer) were used as polymeric matrices in polymer + metal composites. The concentration of micrometric (Al, Ag and Ni) as well as nanometric particles (Al and Ag) was varied from 0 to 10 %. Composites were prepared by blending followed …
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Development of Flexible Pressure and Strain Sensors for Electronic Skin Applications
… hydrogel and an interlocked microstructured elastomer. The former is constituted from hollow microspheres whereas the latter contains protruding micropyramids. A semi-analytical model is also developed to capture the change in the contact resistance in response to a mechanically applied …
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Elastic stretchable optical fibers
… index cladding, formed by a fluorinated thermoplastic elastomer. The fibers are manufactured by co-extrusion of their constituent materials. They can be stretched to 300% strain repeatedly. Axial deformation of the fibers results in a variation of their light guiding properties. The …
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Design, Fabrication, and Testing of a 3D Printer Based Microfluidic System
… fabricated. The devices were fabricated using a thermoplastic elastomer (TPE) material as an alternative material to the present polydimethylsiloxane (PDMS). The micro-pump’s fluid flow output was analyzed through the characterization of the micro-pumps flowrate with respect to the pumps driving …
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Applications of high resolution solid state carbon-13 NMR to the study of multicomponent polymer systems
… of domain structure and molecular motion of two thermoplastic elastomer systems, including a series of styrene isoprene-styrene linear triblock copolymers (SIS’s) of various compositions, molecular weights and sample histories, and a poly(ester)- urethane based on poly(1,4-butylene adipate) and …
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Sustainable Polymers Through Creative Design
… Next, a photodegradable and biodegradable thermoplastic elastomer (TPE) was synthesized that incorporated a ketone containing polybutadiene (PB) flanked by polylactide (PLA). The thermomechanical properties were controlled based on the relative length of each block while the rate of …
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Development of Sustainable Thermoplastic Elastomers
… with targeted properties appropriate for thermoplastic elastomer applications. Well-defined polymers with desired compositions and controlled molecular weight distributions were successfully synthesized using reversible addition fragmentation chain transfer (RAFT) polymerization. SAS …
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Synthesis and characterisation of biobased polyamides and their cellulose nanocomposites
… wholly biobased, self-healing, polyamide-based thermoplastic elastomer (PA36,36) was synthesised using a fatty dimer acid and a fatty dimer amine, both containing multiple alkyl chains, through a simple one-pot condensation polymerisation under different polymerisation times. The resulting …
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Overcoming Challenges in Reversible Addition–Fragmentation Chain Transfer Polymerization using Photoinduced Electron/Energy Transfer Catalysis
… The method yielded a novel high-molecular-weight thermoplastic elastomer that retained its shape. Expanding on the second method, we sought to maximize chain end fidelity and further elucidate the underlying rates of the technique. By coupling the development of new characterization methods to …
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Siloxane-Based Reinforcement of Polysiloxanes: from Supramolecular Interactions to Nanoparticles
… networks represent another important class of elastomers in which fillers, namely silica and siloxane-based fillers, impart improved mechanical properties to otherwise weak PDMS networks. This work demonstrates that proper silicon-based reinforcing agent selection (e.g. siloxane-based MQ …
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Design, Synthesis and Study of Thermomechanically Active Polymer Networks Based on Latent Crosslinking of Semicrystalline Polymers
… mechanically flexible, fully thermoplastic shape memory polymer. Towards this end, we have developed a simple but effective macromolecular design that includes pendent crosslinking sites via the chain extender of a polyurethane architecture bearing semicrystalline …
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Structure-Property Relationships of Polyisobutylene-Block-Polyamide Thermoplastic Elastomers
<p>Thermoplastic elastomers (TPEs) are a class of polymer fit for a wide variety of applications due to their customizability. In the synthesis of these types of materials, an elastically-performing polymer, deemed the “soft block,” is combined with a stiffer “hard block” polymer, each of which can …
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Non-covalent Intermolecular Interactions in Polymer Design: Segmented Copolymers to Non-viral Gene Delivery Vectors
… oxamide) (PDMS-UOx) copolymers displayed thermoplastic elastomer behavior with enhanced physical properties compared to PDMS polyurea (PDMS-U) controls. Synthesis of a difunctional oxamic hydrazide terminated PDMS oligomer through a two-step end capping procedure with diethyl oxalate and …
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