Recent advances in shape–memory polymers: Structure, mechanism, functionality, modeling and applications

Hu, Jinlian; Zhu, Yaofeng; Huang, Hui; J, Lu

doi:10.1016/j.progpolymsci.2012.06.001

Cited by 1,111 publications

(738 citation statements)

References 317 publications

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“…Interestingly, SMPs have a number of advantages over shape memory metal alloys (SMAs) such as light weight, high elastic deformation with a strain value as high as 200%, a broad range of application temperatures which can be tailored, ease of manipulation, potential biocompatibility and biodegradability as well as cost competitiveness [5,9]. SMPs have a wide application range in self-deployable structures in spacecraft [1,10], orthodontic applications, intelligent medical devices [5,9] or smart textiles and apparels [11]. In general, SMPs can be either thermoplastics, i.e.…”

Section: Introductionmentioning

confidence: 99%

Effects of benzoxazine resin on property enhancement of shape memory epoxy: A dual function of benzoxazine resin as a curing agent and a stable network segment

Tanpitaksit¹,

Jubsilp²,

Rimdusit³

2015

Express Polym. Lett.

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Abstract. An ability of bisphenol-A/aniline based benzoxazine resin (BA-a) to simultaneously acts as a curing agent and a stable or rigid network segment for shape memory epoxy, i.e. a two component system, is demonstrated. This significantly simplifies a formulation of present shape memory epoxy systems, i.e. a three or four component system. A suitable content of BA-a in the aliphatic epoxy (NGDE)/polybenzoxazine (PBA-a) samples for good shape memory performance is in a range of 30 to 50 mol%. The storage modulus of the obtained NGDE/PBA-a shape memory polymers (SMPs) was increased from 3.57 GPa for 30 mol% BA-a content to 4.50 GPa for 50 mol% BA-a content. Glass transition temperature of the sample was also substantially increased with increasing BA-a fraction, i.e. from 51°C to 140°C. Flexural modulus and strength at room temperature of the samples at 50 mol% BA-a were found to be as high as 3.97 GPa and 132 MPa compared to the maximum values of 2.54 GPa and 100 MPa of SMP based on cyanate ester-epoxy. All samples exhibited a high value of shape fixity close to 100%. A presence of the BA-a in the samples also imparted a greater recovery stress ranging from 0.25 to 1.59 MPa. Consequently, the obtained NGDE/PBA-a copolymers are highly attractive for shape memory materials to be used in a broader range of applications particularly at elevated temperature and a higher recovery stress value.

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Section: Introductionmentioning

confidence: 99%

Effects of benzoxazine resin on property enhancement of shape memory epoxy: A dual function of benzoxazine resin as a curing agent and a stable network segment

Tanpitaksit¹,

Jubsilp²,

Rimdusit³

2015

Express Polym. Lett.

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“…The modelling approaches of shape-memory polymers can roughly be divided into macroscopic and micromechanical [8,10]. In macroscopic models, the material behaviour is simulated as the behaviour of a system constructed of elastic, viscous and purely plastic elements.…”

Section: Introductionmentioning

confidence: 99%

Micromechanical modelling of reversible and irreversible thermo-mechanical deformation of oriented polyethylene terephthalate

Poluektov

Dommelen

Govaert

et al. 2015

Computational Materials Science

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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.…”

mentioning

confidence: 99%

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

2014

Nat Commun

231

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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Recent advances in shape–memory polymers: Structure, mechanism, functionality, modeling and applications

Cited by 1,111 publications

References 317 publications

Effects of benzoxazine resin on property enhancement of shape memory epoxy: A dual function of benzoxazine resin as a curing agent and a stable network segment

Effects of benzoxazine resin on property enhancement of shape memory epoxy: A dual function of benzoxazine resin as a curing agent and a stable network segment

Micromechanical modelling of reversible and irreversible thermo-mechanical deformation of oriented polyethylene terephthalate

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

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