Synthesis, Properties, and Light-Induced Shape Memory Effect of Multiblock Polyesterurethanes Containing Biodegradable Segments and Pendant Cinnamamide Groups

Wu, Linbo; Jin, Chunli; Sun, Xiaojie

doi:10.1021/bm1012162

Cited by 146 publications

(95 citation statements)

References 35 publications

(58 reference statements)

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“…The conversion rate of double bond in the cinnamon group can be used as the degree of photo crosslinking. 32 The results further indicate that the TSMPU was prepared successfully.…”

Section: ■ Experiments and Methodsmentioning

confidence: 76%

Design of Triple-Shape Memory Polyurethane with Photo-cross-linking of Cinnamon Groups

Wang

Yang

Chen

et al. 2013

ACS Appl. Mater. Interfaces

103

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A triple-shape memory polyurethane (TSMPU) with poly(ε-caprolactone) -diols (PCL-diols) as the soft segments and diphenyl methane diisocyanate (MDI), N,N-bis (2-hydroxyethyl) cinnamamide (BHECA) as the hard segments was synthesized via simple photo-crosslinking of cinnamon groups irradiated under λ > 280 nm ultraviolet (UV) light. Fourier transform infrared spectroscopy (FT-IR), proton nuclear magnetic resonance ( 1 H-NMR) and ultraviolet-visible absorption spectrum (UV−vis) confirmed the chemical structure of the material. Differential scanning calorimetry (DSC) and dynamic mechanical analysis (DMA) results demonstrated that the photocrosslinked polymer possessed two transition temperatures, one is due to the melting point of the soft segment PCL-diols, and the other is due to the glass transition temperature. All these contributed to the cross-linked structure of the hard segments and resulted in an excellent triple-shape memory effect. Alamar blue assay showed that the material has good non-cytotoxicity and can be potentially used in biomaterial devices.

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“…The conversion rate of double bond in the cinnamon group can be used as the degree of photo crosslinking. 32 The results further indicate that the TSMPU was prepared successfully.…”

Section: ■ Experiments and Methodsmentioning

confidence: 76%

Design of Triple-Shape Memory Polyurethane with Photo-cross-linking of Cinnamon Groups

Wang

Yang

Chen

et al. 2013

ACS Appl. Mater. Interfaces

103

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“…Subsequent efforts by other groups have improved the shape memory performance to a certain extent [54][55][56].…”

Section: Phase Versus Molecular Switches and Thermal Versus Non-thermmentioning

confidence: 99%

Recent progress in shape memory polymer: New behavior, enabling materials, and mechanistic understanding

Zhao

Xie

2015

Progress in Polymer Science

1,161

749

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Shape memory polymers (SMPs), as a class of programmable stimuliresponsive shape changing polymers, are attracting increasing attention from the standpoint of both fundamental research and technological innovations. Following a brief introduction of the conventional shape memory effect (SME), progress in new shape memory enabling mechanisms and triggering methods, variations of in shape memory forms (shape memory surfaces, hydrogels, and microparticles), new shape memory behavior (multi-SME and two-way-SME), and novel fabrication methods are reviewed. Progress in thermomechanical modeling of SMPs is also presented. Abbreviations:SCPs shape changing polymers; LCEs liquid crystalline elastomers; SMP shape memory polymer; SME shape memory effect; 2W two-way; 1W oneway; T trans transition temperature; T g glass transition temperature; T m melting temperature; T cl liquid crystal cleaning temperature; T d deformation temperature; T f shape fixing temperature; T c crystallization temperature; R f shape stability ratio; R r shape recovery ratio; T sw switching temperature; ε max maximum recoverable strain; σ max maximum recovery stress; SMC shape memory cycle; ε load strain under load; ε fixed strain; T r recovery Page 2 of 106 A c c e p t e d M a n u s c r i p t 2 temperature; ε rec recovered strain; V r strain recovery rate; T σmax temperature corresponding to σ max ; T sw,app apparent switching temperature; PCL poly(ε-caprolactone); SMPU shape memory polyurethane; EMU elemental memory unit; TME temperature memory effect; PU polyurethane; T i liquid-crystal isotropic transition temperature; T v vitrification temperature; CIE crystallization induced elongation; MIC melting induced contraction

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“…[4,5] SMPs are usually chemically or physically crosslinked materials that exhibit an elastomeric behaviour above a glass transition (for amorphous materials) or a melting transition (for semi-crystalline polymers).…”

Section: Introductionmentioning

confidence: 99%

Thermoreversibly Crosslinked Poly(ε‐caprolactone) as Recyclable Shape‐Memory Polymer Network

Defize

Riva

Raquez

et al. 2011

Macromol. Rapid Commun.

126

129

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A new concept to build shape memory polymers (SMP) combining outstanding fixity and recovery ratios (both above 99% after only one training cycle) typical of chemically crosslinked SMPs with reprocessability restricted to physically crosslinked SMPs is demonstrated by covalently bonding, through thermoreversible Diels-Alder (DA) adducts, star-shaped poly(ε-caprolactones) (PCL) end-functionalized by furan and maleimide moieties. A PCL network is easily prepared by melt-blending complementary end-functional star polymers in retro DA regime, then by curing at lower temperature to favour the DA cycloaddition. Such covalent network can be reprocessed when heated again at the retro DA temperature. The resulting SMP shows still excellent shape memory properties attesting for its good recyclability.

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Synthesis, Properties, and Light-Induced Shape Memory Effect of Multiblock Polyesterurethanes Containing Biodegradable Segments and Pendant Cinnamamide Groups

Cited by 146 publications

References 35 publications

Design of Triple-Shape Memory Polyurethane with Photo-cross-linking of Cinnamon Groups

Design of Triple-Shape Memory Polyurethane with Photo-cross-linking of Cinnamon Groups

Recent progress in shape memory polymer: New behavior, enabling materials, and mechanistic understanding

Thermoreversibly Crosslinked Poly(ε‐caprolactone) as Recyclable Shape‐Memory Polymer Network

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