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 37 for “"Shape memory Polymers"”.
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Nitinol-reinforced shape-memory polymers
Reinforced shape-memory polymers have been developed from an acrylate based thermoset shape-memory polymer and nitinol wires. A rectangular shape-memory polymer measuring approximately 1 by 2 by 0.1 inches has a ten fold increase in actuation force under three-point bending when reinforced with two …
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4D Printing Shape Memory Polymers for Biomedical Applications
… development of 3D printing techniques using shape-memory polymers (SMPs) hascreated potentials for creating dynamic, three-dimensional structures that can be produced rapidly and be customized for specific and complex architectures. These qualities have made 3D printing a popular fabrication …
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Mechanical designs that explore the applicability of shape memory polymers
Modified versions of epoxy-based shape memory polymers (SMPs) were tested and proven for their adhesive benefits in recent works. A heated dry adhesive system displaying strong adhesive performance on a variety of chemically dissimilar adherend was developed. This thesis explores the mechanical …
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Temperature and Water Responsive Shape Memory Polymers for Soft Tissue Expansion
A biodegradable thermoplastic shape memory polymer which can be used for 3D printing patient specific soft tissue expanders was synthesized and characterized. The bottlebrush polymer with Poly (vinyl alcohol) backbone and polyurethane side chains exhibited shape memory effect. Using an …
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NOVEL SHAPE MEMORY AND MULTI-SHAPE MEMORY POLYMERS FOR BIOMATERIAL APPLICATIONS
… natural environment. In this work, advanced shape memory polymers (SMPs) that respond to non-thermal triggers and multi-shape memory materials capable of multiple topographical transitions were developed for advanced active cell culture platforms. </p> <p> The first part of this dissertation …
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An exploration of shape memory polymers and (nano) composites for packaging applications.
Shape memory polymers, SMP, are gaining considerable interest in research and industry due to their novel properties and vast potential. SMP belong to an emerging class of materials known as 'smart polymers', and have the intriguing ability to be moulded into a temporary shape, store that temporary …
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Constitutive modeling of the thermo-mechanics associated with crystallizable shape memory polymers
… developing constitutive model for crystallizable shape memory polymers are addressed in details. Shape memory polymers are novel material that can be easily formed into complex shapes, retaining memory of their original shape even after undergoing large deformations. The temporary shape is stable …
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Shape memory polymers with improved shape recovery properties in focused ultrasound fields
Shape memory polymers (SMPs) have garnered significant attention for their remarkable ability to recover deformations upon external stimulation, making them highly suitable for biomedical devices, soft robotics, and deployable systems. Among the various activation mechanisms, focused ultrasound …
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Shape memory polymers as direct contact dry adhesives for transfer printing and general use
… benefits and potential limitations of developing shape memory polymer (SMP)-based dry adhesives. Prior to the presentation of experimental results, a review of the current state of dry adhesive knowledge including both theory, observations of the natural world, and lessons learned by other …
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Assessment and preliminary model development of shape memory polymers mechanical counter pressure space suits
… to assess the viability of a space qualified shape memory polymer (SMP) mechanical counter pressure (MCP) suit. A key development objective identified by the International Space Exploration Coordination Group, the development of a superior space suit with greater mobility and environmental …
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Fused filament fabrication to manufacture three- and four-dimensional objects made of shape memory polymers
… reversible material properties, behavior, or shape changes according to a program. As the programmable materials require neither control electronics nor technical devices or cables, the self-sufficient behavior makes them fulfill sensor and actuator functionality. Shape memory polymers (SMPs) …
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A study of shape memory polymers and their usage in the development of directional dry adhesives
"This thesis first introduces shape memory polymers and their unique phase-changing and recoverability properties. The underlying thermodynamic explanations along with their fundamental governing equations is presented. A few possible potential areas of interest for applications of this unique …
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Shape Memory Polymers as 2D Substrates and 3D Scaffolds for the Study of Cell Mechanobiology and Tissue Engineering
… dynamic in vivo cell environment. In this work, shape memory polymers (SMPs) were employed to develop dynamic 2D substrates and 3D scaffolds that undergo programmed changes in shape under cell compatible conditions. These substrates and scaffolds were applied in vitro and in vivo to demonstrate …
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Constitutive modeling of glassy memory polymers
… for developing constitutive model for glassy shape memory polymers are addressed in detail. Shape memory polymers are novel material that can be easily formed into complex shapes, retaining memory of their original shape even after undergoing large deformations. The temporary shape is stable …
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Development of a finite element method for light activated polymers
Traditional Shape Memory Polymers (SMPs) belong to a class of smart materials which have shown promise for a wide range of applications. They are characterized by their ability to maintain a temporary deformed shape and return to an original parent permanent shape. The first SMPs developed …
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Thermo-responsive and electroconductive shape-memory polymer composites for useful applications
Shape-memory polymers (SMPs) are stimuli-responsive materials with the ability to undergo a large recoverable deformation upon the application of an external stimulus. International research interest into the shape-memory effects (SMEs) of these polymers is rapidly growing. Unique polymer …
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Mechanics of amorphous polymers and polymer gels
Many applications of amorphous polymers require a thermo-mechanically coupled large-deformation elasto-viscoplasticity theory which models the strain rate and temperature dependent response of amorphous polymeric materials in a temperature range which spans the glass transition temperature of the …
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Investigation of Polymer-Filled Honeycomb Composites with Applications as Variable Stiffness Morphing Aircraft Structures
Shape morphing in aerospace structures has the potential to reduce noise, improve efficiency, and increase the adaptability of aircraft. Among the many challenges in developing morphing technologies is finding suitable wing skin materials that can be both stiff to support the structural loads, …
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Thermo-mechanical characterization of carbon-reinforced shape memory polymer
Shape memory materials (SMM) are those materials that possess the inimitable quality of remembering their shapes. They recover their original shapes upon exposure to external stimulus like heat, light, electric field, magnetic field, moisture etc. Types of SMMs include shape memory alloys (SMAs), …
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Size Effect in Polymeric Materials: the Origins and the Multi-physics Responses in Ultrasound Fields
… designed by utilizing the unique properties of polymers at nanoscale. However, the inside mechanism of the size dependency in polymeric materials are still not clear yet. In this dissertation, systematic computational and experimental studies are made in order to understand the origins of the …
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