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 29 for “"thermoplastic polyurethane"”.
-
Synthesis and characterization of silk-inspired thermoplastic polyurethane elastomers
Segmented polyurethane elastomers containing additional ordered structures within the hard or soft domains were developed to mimic the hierarchical structure and superior properties observed in spider silk fibers. The silk's toughness is related to a fiber morphology that includes P-pleated …
-
Preferential nanoreinforcement of thermoplastic polyurethane elastomers with dispersed nano-clay
… motivated to develop strong, tough, elastomeric polyurethanes to be used in soldier applications I have prepared polyurethane/clay nanocomposites. Polymer/clay nanocomposites have exhibited great potential for providing enhanced and possibly-tunable thermomechanical behavior. However, the biggest …
-
ZSM-5/thermoplastic polyurethane mixed matrix membranes for pervaporation of dilute aqueous organic solvents
The present study aimed to synthesize ZSM-5/thermoplastic polyurethane (TPU) mixed matrix membranes (MMMs) for efficient pervaporation of n-butanol and ethanol from dilute aqueous solutions as a cheap and easy to fabricate replacement for the benchmark polydimethylsiloxane (PDMS) membranes. Binary …
-
Processing and Characterization of Multifunctional Thermoplastic Nanocomposite Films
… of nanoparticles reinforced multifunctional thermoplastic nanocomposite films. This process is capable of making a thin sheet of thermoplastic nanocomposites with high nanoparticle loadings. The smallest thickness can be 40um. The objective of this study is to design and optimize the …
-
Thermomechanics of nano-filled elastomers
… incorporation of nanoparticles into engineering thermoplastic elastomers affords engineers an opportunity to formulate flexible, tough and multifunctional polymer nanocomposites that potentially rival the most advanced materials in nature. Development of these materials is difficult since …
-
Design of a Shape Memory Alloy Coil Actuated Robotic Finger with Compliant Joint Antagonists
… compliant finger mechanism is 3D-printed using thermoplastic polyurethane. Characterization of the mechanism exhibits a hysteresis profile in the force-displacement domain. The SMA coils are designed using a static two-state model, based on the required actuation stroke at discrete …
-
The development and characterization of soft robotic contractile actuators
… for blood ejection. However, McKibben PAMs with thermoplastic polyurethane (TPU) bladders were too bulky and prevented the embedding of additional actuators. Therefore, multiple alternate PAM designs which occupy minimal unpressurized volume were explored. Of the various bladder and mesh pairings …
-
Paravalvular sealing pf percutaneous heart valves
… skirts for the minimization of PVR in THV's. Thermoplastic polyurethane (TPU) was electrospun onto mandrels and several techniques (CO2 - laser, ultra-sonic, solvent and conductive heat bonding) used to attach the scaffolds to pre-coated TAVR stents. Attachment strength was modelled by finite …
-
The Isolation of Cellulose Nanocrystals from Pistachio Shells and Their Use in Water Actuating Smart Composites
… X-ray diffraction. The CNCs were also added to thermoplastic polyurethane (TPU) to observe the reinforcement effects by dynamic mechanical analysis. Pistachio shells offered a high yield source material for CNCs, with a high aspect ratio but a low crystallinity. They did offer significant …
-
Biomimetic composite structure to simulate tendon performance
… polymer fibers. The matrix material was a thermoplastic polyurethane, Estane 5714 F5P. A polyamide (Nylon 6-6), a polyethylene terephthalate (Dacron) and a block copolymer of polyethylene oxide and aromatic polyurethane (Lycra) were used as the straight fiber reinforcement A crimped Nylon 6 …
-
Process-Structure-Property Relationships of Cellulose Derivative/Thermoplastic Urethane Polymer Composites
Cellulose-reinforced thermoplastic composites have garnered significant attention as sustainable alternatives to conventional petroleum-based materials, offering advantages such as biodegradability, mechanical reinforcement, and tunable functionality. These composites hold immense potential for …
-
Development of synthetic fiber-based reinforcements for thermoplastics as alternative to steel-based analogs for industrial applications
… carbon, glass, and/or Kevlar fibers) to develop Thermoplastic Polyurethane (TPU) composites with superior mechanical properties and enhanced safety characteristics. The experimental work proposed in this thesis is divided into 3 distinct experimental research phases. The experimental results of …
-
Impact Mechanics of PMMA/PC Multi-Laminates with Soft Polymer Interlayers
… and unbonded sample configurations, with two thermoplastic polyurethane and four polyacrylate interlayers. Quantitative metrics from force and displacement signals, along with post-impact damage observations, are used to compare impact performance between configurations and impact velocities …
-
Development and characterization of electrically conductive thermoplastic based composite materials for fuel cell bipolar plates
Thermoplastic composites exhibit multiple attractive attributes, such as lightweight, low cost, ease and speed of manufacturing, and ability to recycle, which make them ideal for a wide range of applications. Composites containing conductive fillers have lower resistivity and better ability to …
-
The mechanical design aspects of a small diameter vascular prosthesis
… materials for their manufacture. Ether free polyurethanes are currently amongst the most popular materials for use in biological implants although these materials are inherently too stiff for use in vascular prostheses. These materials can be made more compliant by introducing porosity. Apart …
-
Accelerated Durability Characterization of Laminated Polycarbonate Systems
… A more recently developed interlayer type is thermoplastic polyurethane (TPU), which has the ability to bond to substrates other than glass, making it useful for applications like ballistic-resistant glass laminates, which often involve sheets made of polycarbonate. This study aims to explore …
-
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 …
-
Polydimethylsiloxane Modification of Segmented Thermoplastic Polyurethanes and Polyureas
… oxide) (PTMO), polyether based segmented thermoplastic polyurethane with a secondary aminoalkyl functional polydimethylsiloxane (PDMS), which was intended to improve the fire resistance of polyurethane systems. The PDMS oligomer was successfully incorporated into the polyurethane backbone …
-
Glass curtain wall and anchorage system response under blast loading
… symbol] (SG) from two suppliers, as well as Thermoplastic Polyurethane (TPU), under varying temperatures. Additionally, it evaluated the static resistance function of LG panels using a full-scale water chamber and developed finite element (FE) numerical models to predict their dynamic …
-
An investigation of oriented polymers for power transmission applications
… used in commercially available belts such as thermoplastic polyurethane (TPU) and polyvinyl chloride (PVC). The main disadvantages were the lack of dimensional stability and number of cycle to failure.
Page 1 of 2