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Showing 1 to 11 of 11 for “"Thermoplastic Polyurethanes"”.
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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 …
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Multiblock Thermoplastic Polyurethanes For Biomedical and Shape Memory Applications
<p>Polyurethanes are a class of polymers that are capable of tailoring the overall polymer structure and thus final properties by many factors. The great potential in tailoring polymer structures imparts PUs unique mechanical properties and good cytocompatibility, which make them good candidates …
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Application-oriented development of thermoplastic polyurethanes with shape memory properties
… with a high degree of functionality. Thermoplastic polyurethanes (TPUs) can exhibit such shape memory properties. This is due to their copolymer structure and phase-segregated morphology, which impart shape memory characteristics to the TPUs. TPUs consist of a soft segment (SS) and a …
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Mechanical Properties of Candidate Materials for Morphing Wings
… market. The materials tested were a type of thermoplastic polyurethanes, copolyester elastomer, shape memory polymer, or woven materials that are made out of elastane yarns. The first study determined the required forces to strain the material in a uniaxial direction. A test stand was …
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Mechanics of abrasive wear of elastomeric materials
… large strain nonlinear stress-strain behavior of thermoplastic polyurethanes (TPUs) exhibits strong hysteresis, rate dependence and cyclic softening.
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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 …
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Development of a fatigue tester and material model for flexible heart valve applications
… stress-strain behaviour of polymer networks and thermoplastic polyurethanes in particular, as well as how to practically evaluate the durability of the proposed material. A model for polyurethane stress-strain behaviour is proposed, whereby the number of monomers between crosslinks is suggested …
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Renewable Source Thermoplastics
… is concerned with developing renewable resource thermoplastic materials to replace existing non-renewable or possibly hazardous industry standard products.</p> <p>Cerenol TPU Incorporation</p> <p>Dupont has recently developed a renewable source Polyol (Cerenol) which is derived from 1,3 propane …
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Interactions of Cellulose Nanocrystals in Colloidal and Composite Systems
… is found when CNCs are introduced as fillers in thermoplastic polyurethanes (TPUs) above a critical concentration required to achieve percolation. The interactions between CNCs in the percolating network provide a strong enhancement to the modulus of these materials. However, these materials …
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Novel Monomer Design for Next-Generation Step-Growth Polymers
… impetus for industrial funding. Engineering thermoplastics, such as linear polyetherimides (PEIs), had carefully targeted molecular weights for analysis of the effect of molecular weight and regiochemistry on the thermomechanical and rheological properties of PEIs. The design of linear, high …
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Fused filament fabrication to manufacture three- and four-dimensional objects made of shape memory polymers
… external stimulus like heat. In the last decade, thermoplastic polyurethanes (TPUs) belonged to the most researched SMPs. The thermoplastic nature of TPUs permits them to be molded using classical melt-based processing techniques like extrusion, injection molding, etc. Additive manufacturing (AM), …