A finite deformation thermomechanical constitutive model for triple shape polymeric composites based on dual thermal transitions

Ge, Qi; Luo, Xiaohua; Iversen, Christian B.; Nejad, Hossein Birjandi; Mather, Patrick T.; Dunn, Martin L.; Hu, Qi

doi:10.1016/j.ijsolstr.2014.03.029

Cited by 51 publications

(39 citation statements)

References 63 publications

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“…In addition, if one takes "phase" as a more general representation of a small collection of material fraction that has distinct deformation history, one would find that many active materials can achieve shape memory effects or its active motion through the phase evolution mechanism, such as light activated polymers developed by Lendlein et al [53] and Scott and coworkers [220,293], covalent adaptable network polymers with bond exchange reaction [294,295], DielsAlder network [296,297], ionic gels [298]. Several constitutive models were developed in the recent years to model these material systems, such as light activate polymers [299][300][301], shape memory elastomeric composites [302] and its triple shape memory behavior [303,304], polymers with temperature-dependent bond exchange reactions [305], and Diels-Alder networks [306]. The concept of employing phase formation to achieve shape memory effect can be easily illustrated by Fig.…”

Section: Phase Evolution Modelsmentioning

confidence: 99%

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

Zhao

Xie

2015

Progress in Polymer Science

1,110

729

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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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Section: Phase Evolution Modelsmentioning

confidence: 99%

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

Zhao

Xie

2015

Progress in Polymer Science

1,110

729

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“…To further improve the model prediction of time-dependent shape memory behavior, more sophisticated models that contained multiple relaxation times (Buckley et al, 2007;Chen and Nguyen, 2011;Diani et al, 2012;Ge et al, 2012;Westbrook et al, 2011;Xiao et al, 2013;Yu et al, 2012) were used to describe the broad distribution of stress and structural relaxation times typically displayed by thermoset polymers. Recently, the established 3D multibranch model (Westbrook et al, 2011) has been applied successfully to predict various time-and temperature-dependent shape memory behavior (Ge et al, 2013;Ge et al, 2014;Yu et al, 2014). In addition to this dominated thermoviscoelastic approach, in recent years, SMP modeling methods have even incorporated molecular dynamic simulation (Diani and Gall, 2007), quantum mechanics (Zhang et al, 2010), multi-scale modeling (Shojaei and Li, 2013), and statistical mechanics (Shojaei and Li, 2014), etc.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Temperature and rate dependent thermomechanical modeling of shape memory polymers with physics based phase evolution law

Yang

2016

International Journal of Plasticity

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“…[21] The T g of PVAc decreases to ∼16°C upon equilibrium plasticization with water, and consequently, the water-soaked PVAc: PCL film has a T g about 16°C and a T m (from PCL) around 55°C, making it an appropriate candidate for triple SM behavior. To characterize this material, dual SM properties of the dry film were first examined.…”

Section: Triple Sm Characterization Of the Hydrated Compositementioning

confidence: 99%

“…[26] Dual SM of a dry composite film was first demonstrated by deforming a rectangular PVAc80:PCL20 sample [ Fig. S16(A)] to a spiral shape (temporary shape) at 80°C (20% being established as the optimal PCL loading level for triple SM properties in other systems [21,[27][28][29] ). Upon fixing in a freezer at −17°C for 10 min, both PVAc and PCL phases were fixed by vitrification and crystallization, respectively [ Fig.…”

Section: Sh Characterizationmentioning

confidence: 99%

Interwoven polymer composites via dual-electrospinning with shape memory and self-healing properties

2015

Self Cite

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Material research and development is increasingly focusing on achieving specialized functionality in materials. For example, the ability to "selfheal (SH)", or naturally repair accrued damage, is attractive because it extends the lifetime of the material by increasing resistance to damaging conditions and prolonging preservation of material properties. Additionally, shape memory (SM) materials, including SM polymers, are actively considered for their ability to change shape one or more times upon application of an external stimulus. Here, we present a polymer composite, composed of poly(vinyl acetate) (PVAc) and poly(ε-caprolactone) (PCL), exhibiting both SH and SM functionalities. In fact, the SM assists in the SH ability in a process developed by our group termed, shape memory-assisted self-healing (SMASH). The advantage of the SH composite presented here is its simple fabrication. Dual-electrospinning is used to simultaneously electrospin PVAc and PCL, achieving an interwoven polymeric composite of otherwise immiscible polymers. The dual-electrospinning method facilitates precise control of the relative weight fractions of the components, and thus allows for tuning of the material properties. Upon thermal activation, damaged PVAc-PCL composites exhibited SH under a variety of testing conditions. Furthermore, the composites exhibited impressive dual and triple SM capabilities in the dry and hydrated states, respectively. Together, the commercial availability of the components and the simplicity of preparation translate to a SMASH system that could be mass produced and used as a SH coating or alone, as a packaging material.

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A finite deformation thermomechanical constitutive model for triple shape polymeric composites based on dual thermal transitions

Cited by 51 publications

References 63 publications

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

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

Temperature and rate dependent thermomechanical modeling of shape memory polymers with physics based phase evolution law

Interwoven polymer composites via dual-electrospinning with shape memory and self-healing properties

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