Recent advances in shape memory polymers and composites: a review

Ratna, Debdatta; Karger‐Kocsis, J.

doi:10.1007/s10853-007-2176-7

Cited by 867 publications

(644 citation statements)

References 150 publications

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“…T he concept of shape memory polymers (SMPs) [1][2][3][4][5][6] has been known for decades [7][8][9][10][11][12][13] . In general, the polymer's shape memory (SM) effect is described and evaluated in a thermo-temporal SM cycle, where the SMP is firstly deformed at a high temperature (usually above the glass transition or melting point) and subsequently frozen upon cooling to fix the programmed temporary shape.…”

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confidence: 99%

Reduced time as a unified parameter determining fixity and free recovery of shape memory polymers

2014

Nat Commun

235

179

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Shape memory polymers are at the forefront of recent materials research. Although the basic concept has been known for decades, recent advances in the research of shape memory polymers demand a unified approach to predict the shape memory performance under different thermo-temporal conditions. Here we report such an approach to predict the shape fixity and free recovery of thermo-rheologically simple shape memory polymers. The results show that the influence of programming conditions to free recovery can be unified by a reduced programming time that uniquely determines shape fixity, which consequently uniquely determines the shape recovery with a reduced recovery time. Furthermore, using the time-temperature superposition principle, shape recoveries under different thermo-temporal conditions can be extracted from the shape recovery under the reduced recovery time. Finally, a shape memory performance map is constructed based on a few simple standard polymer rheology tests to characterize the shape memory performance of the polymer.

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confidence: 99%

Reduced time as a unified parameter determining fixity and free recovery of shape memory polymers

2014

Nat Commun

235

179

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“…The reader is referred to a number of excellent general reviews of SMPs and their composites [82][83][84][85] for more exhaustive assessments of previously studied polymers and their properties. A Figure 6 The molecular mechanism of a dual shape memory polymer throughout a thermal cycle.…”

Section: Tendons-release Of Stored Energymentioning

confidence: 99%

Morphing in nature and beyond: a review of natural and synthetic shape-changing materials and mechanisms

2016

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Shape-changing materials open an entirely new solution space for a wide range of disciplines: from architecture that responds to the environment and medical devices that unpack inside the body, to passive sensors and novel robotic actuators. While synthetic shape-changing materials are still in their infancy, studies of biological morphing materials have revealed key paradigms and features which underlie efficient natural shape-change. Here, we review some of these insights and how they have been, or may be, translated to artificial solutions. We focus on soft matter due to its prevalence in nature, compatibility with users and potential for novel design. Initially, we review examples of natural shape-changing materials-skeletal muscle, tendons and plant tissues-and compare with synthetic examples with similar methods of operation. Stimuli to motion are outlined in general principle, with examples of their use and potential in manufactured systems. Anisotropy is identified as a crucial element in directing shape-change to fulfil designed tasks, and some manufacturing routes to its achievement are highlighted. We conclude with potential directions for future work, including the simultaneous development of materials and manufacturing techniques and the hierarchical combination of effects at multiple length scales.

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“…Shape memory polymers (SMPs) are attractive smart materials that can recover to its origin shape by applying extra stimuli like heat, light, water, moisture etc [1], [2]. Most studies of SMPs focus on the thermal-induces SMPs because of their wide possible applications in microelectromechanical systems, actuators, for self healing and health monitoring purposes, and in bio-medical devices last decades [3].…”

Section: Introductionmentioning

confidence: 99%

Studies on Moisture-Sensitive Shape Memory Behavior of IPDI –BINA Based Polyurethane

Yuan¹,

Chen²,

Chen³

et al. 2013

IJCEA

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Abstract-Shape memory polyurethane is attractive in recent years because of its wide applications in many fields. In order to study the moisture-sensitive shape memory effect of pyridine containing shape memory polyurethane, in this work, moisture absorption and moisture-sensitive shape memory behavior of pyridine containing SMPU synthesized from BINA and IPDI are investigated systematically. The results show that IPDI-BINA SMPU shows moisture absorption and the moisture absorption affects significantly the thermal and DMA properties. Finally, shape recovery process under moisture condition demonstrates that IPDI-BINA SMPU show moisture-sensitive shape memory effect that it can recover the origin shape under the moistures condition.

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Recent advances in shape memory polymers and composites: a review

Cited by 867 publications

References 150 publications

Reduced time as a unified parameter determining fixity and free recovery of shape memory polymers

Reduced time as a unified parameter determining fixity and free recovery of shape memory polymers

Morphing in nature and beyond: a review of natural and synthetic shape-changing materials and mechanisms

Studies on Moisture-Sensitive Shape Memory Behavior of IPDI –BINA Based Polyurethane

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