Related Experiment Video
Updated: Dec 7, 2025
09:37
Fabrication of a Bioactive, PCL-based "Self-fitting" Shape Memory Polymer Scaffold
Published on: October 23, 2015
13.3K
Thermomechanical data of polyurethane shape memory polymer: Considering varying compositions
Hailey Fisher1, Payton Woolard1, Colton Ross1
1Biomechanics and Biomaterials Design Laboratory (BBDL), School of Aerospace and Mechanical Engineering, The University of Oklahoma, Norman, OK 73019, USA.
Data in Brief
|September 28, 2020
Summary
This study details the thermal and mechanical properties of twelve polyurethane shape memory polymer (SMP) formulations. Varying monomer ratios (HDI, HPED, TEA) influence properties like glass transition temperature and degradation thresholds.
Area of Science:
- Polymer Science
- Materials Science
- Biomaterials
Background:
- Shape memory polymers (SMPs) offer unique stimulus-responsive properties.
- Polyurethane-based SMPs are explored for advanced applications.
- Tailoring monomer composition is key to controlling SMP performance.
Purpose of the Study:
- To investigate the thermal characteristics of twelve polyurethane SMP compositions.
- To analyze the mechanical behaviors of these SMP compositions.
- To establish structure-property relationships based on monomer ratios.
Main Methods:
- Differential scanning calorimetry (DSC) for glass transition temperatures.
- Dynamic mechanical analysis (DMA) for glass transition temperatures.
- Thermogravimetric analysis (TGA) for thermal degradation thresholds.
- Cyclic tensile testing and failure testing for mechanical properties.
Main Results:
- Quantified glass transition temperatures (Tg) across all compositions.
- Determined thermal degradation thresholds via TGA.
- Measured failure stresses and strains under tensile loading.
- Correlated monomer ratios (HDI, HPED, TEA) with observed thermal and mechanical properties.
Conclusions:
- The study provides comprehensive thermal and mechanical data for various polyurethane SMPs.
- Specific monomer ratios significantly influence the material properties.
- These findings are foundational for selecting SMPs for potential medical device applications, as discussed in companion research.
Keywords:
Failure strainFailure stressGlass transition temperatureShape memory polymerThermal degradation thresholdThermomechanical propertiesMore Related Videos
Related Concept Videos
01:08Molecular Weight of Step-Growth Polymers
2.7K
Step growth polymerization involves bi or multifunctional monomers. Bifunctional monomers react to form linear step growth polymers, whereas multifunctional monomers react to form non-linear or branched polymers.
As the step-growth polymerization involves step-wise condensation of monomers, the molecular weight also builds up eventually. Consequently, high molecular weight polymers are obtained at the late stages of the polymerization, where 99% of monomers have been consumed.
The extent of the...
As the step-growth polymerization involves step-wise condensation of monomers, the molecular weight also builds up eventually. Consequently, high molecular weight polymers are obtained at the late stages of the polymerization, where 99% of monomers have been consumed.
The extent of the...
2.7K
01:26Polymer Classification: Stereospecificity
3.0K
Polymerization generates chiral centers along the entire backbone of a polymer chain. Accordingly, the stereochemistry of the substituent group has a significant effect on polymer properties. Polymers formed from monosubstituted alkene monomers feature chiral carbons at every alternate position in the polymer backbone. Relative to the predominant orientation of substituents at the adjacent chiral carbons, the polymer can exist in three different configurations: isotactic, syndiotactic, and...
3.0K
01:14Polymer Classification: Architecture
3.5K
Polymers are classified as linear or branched on the basis of their chain architecture. The polymer chains in linear polymers have a long chain-like structure with minimal to no branching at all. Even if a polymer features large substituent groups on the monomer, which appear as branches to the skeleton, it is not considered a branched polymer. A branched polymer contains secondary polymer chains that arise from the main polymer chain. The branching occurs when the polymer growth shifts from...
3.5K
01:21Plastic Behavior
421
A material's elastic behavior is characterized by the disappearance of stress once the load is removed, allowing the material to return to its original state. However, when stress surpasses the yield point, yielding commences, marking the onset of plastic deformation or permanent set. This change from elastic to plastic behavior is influenced by the peak stress value and the duration before the load is removed. An intriguing observation occurs when a specimen is loaded, unloaded, and...
421
01:21Polymer Classification: Crystallinity
3.6K
Unlike ionic or small covalent molecules, polymers do not form crystalline solids due to the diffusion limitations of their long-chain structures. However, polymers contain microscopic crystalline domains separated by amorphous domains.
Crystalline domains are the regions where polymer chains are aligned in an orderly manner and held together in proximity by intermolecular forces. For example, chains in the crystalline domains of polyethylene and nylon are bound together by van der Waals...
Crystalline domains are the regions where polymer chains are aligned in an orderly manner and held together in proximity by intermolecular forces. For example, chains in the crystalline domains of polyethylene and nylon are bound together by van der Waals...
3.6K
01:19Members Made of Elastoplastic Material
284
The behavior of elastoplastic materials under bending stresses, particularly in structural members with rectangular cross-sections, is crucial for predicting material responses and understanding failure modes. Initially, when a bending moment is applied, the stress distribution across the section follows Hooke's Law and is linear and elastic. This distribution means the stress increases from the neutral axis to the maximum at the outer fibers, up to the elastic limit.
As the bending moment...
As the bending moment...
284