Related Experiment Video
Updated: Oct 10, 2025
09:37
Fabrication of a Bioactive, PCL-based "Self-fitting" Shape Memory Polymer Scaffold
Published on: October 23, 2015
12.8K
Shape Memory Materials from Rubbers
Arunima Reghunadhan1, Keloth Paduvilan Jibin2, Abitha Vayyaprontavida Kaliyathan2
1Postgraduate Department of Chemistry, Milad-E-Sherif Memorial College, Kayamkulam, Alappuzha 690502, India.
Materials (Basel, Switzerland)
|December 10, 2021
Summary
This paper explores shape memory effect (SME) in elastomers, detailing their properties, influencing factors, and applications. It highlights how polymer characteristics and fillers impact SME effectiveness in smart materials.
Area of Science:
- Materials Science
- Polymer Science
Background:
- Smart materials are gaining research attention.
- The shape memory effect (SME) is a key phenomenon in smart materials, observed in various alloys and polymers.
- Elastomers, including rubbers and polyurethanes, exhibit notable SME properties.
Purpose of the Study:
- To provide an in-depth discussion on the shape memory properties of elastomers.
- To cover the theory, influencing factors, and key applications of SME in elastomers.
- To analyze the effectiveness of SMEs through shape fixity and recovery rate studies.
Main Methods:
- Review of existing literature on SME in elastomers.
- Analysis of thermomechanical cycle studies to assess shape fixity and recovery rate.
- Investigation into the influence of polymer properties and fillers on SME.
Main Results:
- SME is observed in diverse elastomers and composites.
- Thermomechanical studies are crucial for evaluating SME effectiveness.
- Polymer chain length and filler inclusion (clays, nanoparticles, second phase polymers) directly influence SME.
Conclusions:
- Elastomers demonstrate significant shape memory properties with diverse applications.
- Understanding the impact of material composition is key to optimizing SME in elastomers.
- Further research into SME elastomers can lead to advanced smart material applications.
Related Concept Videos
01:19Members Made of Elastoplastic Material
192
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...
192
01:14Polymer Classification: Architecture
3.1K
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...
3.1K
01:21Plastic Behavior
311
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...
311
01:03Step-Growth Polymerization: Overview
3.8K
Step-growth or condensation polymerization is a stepwise reaction of bi or multifunctional monomers to form long-chain polymers. As all the monomers are reactive, most of the monomers are consumed at the early stages of the reaction to form small chains of reactive oligomers, which then combine to form long polymer chains in the late stages. Hence, the reaction has to proceed for a long time to achieve high molecular weight polymers.
Many natural and synthetic polymers are produced by...
Many natural and synthetic polymers are produced by...
3.8K
01:20Types of Step-Growth Polymers: Polyesters
2.3K
The introduction of polyesters has brought major development to the textile industry. The wrinkle-free behavior of polyester blends has eliminated the need for starching and ironing clothes.
Polyesters are commonly prepared from terephthalic acid and ethylene glycol; the crude product is known as poly(ethylene terephthalate) or PET. However, polyesters are synthesized industrially by transesterification of dimethyl terephthalate with ethylene glycol at 150 °C. The two reactants and the...
Polyesters are commonly prepared from terephthalic acid and ethylene glycol; the crude product is known as poly(ethylene terephthalate) or PET. However, polyesters are synthesized industrially by transesterification of dimethyl terephthalate with ethylene glycol at 150 °C. The two reactants and the...
2.3K
01:08Molecular Weight of Step-Growth Polymers
2.5K
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...
2.5K