Polyurethane with an ionic liquid crosslinker: a new class of super shape memory-like polymers

Behera, Prasanta Kumar; Mondal, Prantik; Singha, Nikhil K.

doi:10.1039/c8py00549d

Cited by 38 publications

(46 citation statements)

References 68 publications

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“…extension between the modified model, Barot and Rao model, and experimental data. [29] The constants used for model prediction are α 0 = 0.166, k = k = 0.00006 s can be seen in Figure 3, the modified model predicts the shape fixity and shape recovery more accurately than Barot and Rao model with similar explanation presented in the previous case in which the dissipation occurred in the amorphous phase. Figure 4, illustrates the shape memory behavior of polyurethane with 1,4-butane-diol as a chain extender developed by Behera et al and compares the prediction of two models based on the obtained parameters from experimental data.…”

Section: F I G U R E 4 Comparison Of Stress-strain Behavior For Uniaxialsupporting

confidence: 51%

“…Indeed, the model modification was expressed by considering the viscous dissipation in the amorphous phase in all stages of the shape memory cycle to achieve a more comprehensive model. The predicted value of fixing ratio at the end of the third stage by Barot and Rao model was obtained 96.45, 81.1, and 61.8% for experimental data presented by Lendlein et al, [27] Momtaz et al, [28] and Behera et al, [29] respectively. While, in the modified model these values were calculated about 97.3, 91.9, and 74.6%, respectively.…”

Section: Discussionmentioning

confidence: 72%

“…The performance of the modified model was compared with the model presented by Barot and Rao [19] and evaluated with the experimental results reported by the Lendlein et al, [27] Momtaz et al, [28] and Behera et al [29] for uniaxial extension and the results were presented in Figures 2 to 4. The final relationships of each stages (Equations (48), (51), (54), and (57)) should be used to plot the shape memory cycle curves.…”

Section: Resultsmentioning

confidence: 99%

“…Figure 4, illustrates the shape memory behavior of polyurethane with 1,4-butane-diol as a chain extender developed by Behera et al and compares the prediction of two models based on the obtained parameters from experimental data. [29] As it is clear, the modified model could predict the shape memory trend more precisely with exact shape fixity and recovery prediction.…”

Section: F I G U R E 4 Comparison Of Stress-strain Behavior For Uniaxialmentioning

confidence: 90%

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A constitutive model of thermoviscoelastic semicrystalline shape memory polymer considering viscous dissipation in the amorphous phase

Akbari

Alamdarnejad

Kokabi

2020

J of Applied Polymer Sci

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Mathematical modeling has increasingly recognized as a powerful tool that could aid the understanding of shape memory behavior in semicrystalline shape memory polymer (SMP). Up to now, studies have not fully taken into account the viscous effect of the amorphous phase in the whole shape memory cycle, which causes a more realistic prediction of the SMP behavior. In this work, a constitutive thermoviscoelastic model was developed to predict the thermomechanical behavior of semicrystalline SMP. The simulated results of the proposed model for a typical uniaxial deformation were compared with the case having no dissipation effect, also with experimental data. The accuracy improvements in the results of the stress–strain trends together with fixing ratio and recovery ratio obtained from the modified model were significant. The results were in good agreement with the experimental data. The modified model revealed a real and more accurate trend by considering viscous dissipation.

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Section: F I G U R E 4 Comparison Of Stress-strain Behavior For Uniaxialsupporting

confidence: 51%

Section: Discussionmentioning

confidence: 72%

Section: Resultsmentioning

confidence: 99%

Section: F I G U R E 4 Comparison Of Stress-strain Behavior For Uniaxialmentioning

confidence: 90%

See 2 more Smart Citations

A constitutive model of thermoviscoelastic semicrystalline shape memory polymer considering viscous dissipation in the amorphous phase

Akbari

Alamdarnejad

Kokabi

2020

J of Applied Polymer Sci

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“…The higher recovery rates can be explained by a faster heat transfer and a plasticizing effect by diffused water molecules resulting in faster melting of the soft segments. [ 46,47 ]…”

Section: Resultsmentioning

confidence: 99%

Tailor‐Made Functional Polymethacrylates with Dual Characteristics of Self‐Healing and Shape‐Memory Based on Dynamic Covalent Chemistry

Mondal

Behera

Voit

et al. 2020

Macro Materials & Eng

Self Cite

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New shape memory polymers with self‐healing behavior are obtained by thermoreversible Diels–Alder (DA) cross‐linking of a furfuryl group‐containing star‐block copolymer with 1,1′‐(methylenedi‐4,1‐phenylene)bismaleimide. The star‐block copolymer consisting of a 3‐arm polycaprolactone (PCL) core and a polyfurfuryl methacrylate shell is synthesized by reversible addition–fragmentation chain transfer (RAFT) polymerization. For this, a 3‐arm macro‐RAFT agent based on PCL is converted with an appropriate amount of furfuryl methacrylate in the presence of a radical initiator. Films of the DA network are partly insoluble at ambient temperatures. After annealing at 120 °C the films become completely soluble because of the progressing retro‐DA reaction. Evaporation of the solvent and subsequent annealing at 60 °C restores the original insoluble state of the material. By means of a scratch test and tensile tests on cut and subsequently mended samples it is shown that the retro‐DA reaction facilitates self‐healing. Additionally, the films show pronounced shape memory effects with reasonable shape recovery and fixity ratios, which are attributed to the melting and crystallization of the PCL phase.

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Fibrous Scaffolds for Muscle Tissue Engineering Based on Touch‐Spun Poly(Ester‐Urethane) Elastomer

Uribe-Gomez

Schönfeld

Posada-Murcia

et al. 2022

Macromolecular Bioscience

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Development of fiber‐spinning technologies and materials with proper mechanical properties is highly important for the manufacturing of aligned fibrous scaffolds mimicking structure of the muscle tissues. Here, the authors report touch spinning of a thermoplastic poly(1,4‐butylene adipate)‐based polyurethane elastomer, obtained via solvent‐free polymerization. This polymer possesses a combination of important advantages such as 1) low elastic modulus in the range of a few MPa, 2) good recovery ratio and 3) resilience, 4) processability, 5) nontoxicity, 6) biocompatibility, and 7) biodegradability that makes it suitable for fabrication of structures mimicking extracellular matrix of muscle tissue. Touch spinning allows fast and precise deposition of highly aligned micro‐ and nano‐fibers without use of high voltage. C2C12 myoblasts readily align along soft polymer fibers and demonstrate high viability as well as proliferation that make proposed combination of polymer and fabrication method highly suitable for engineering skeletal muscles.

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Polyurethane with an ionic liquid crosslinker: a new class of super shape memory-like polymers

Cited by 38 publications

References 68 publications

A constitutive model of thermoviscoelastic semicrystalline shape memory polymer considering viscous dissipation in the amorphous phase

A constitutive model of thermoviscoelastic semicrystalline shape memory polymer considering viscous dissipation in the amorphous phase

Tailor‐Made Functional Polymethacrylates with Dual Characteristics of Self‐Healing and Shape‐Memory Based on Dynamic Covalent Chemistry

Fibrous Scaffolds for Muscle Tissue Engineering Based on Touch‐Spun Poly(Ester‐Urethane) Elastomer

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