Characterization of the thermoresponsive shape‐memory effect in poly(ether ether ketone) (PEEK)

Wu, Xiaomo; Huang, Wei Min; Ding, Zhaozhao; Tan, Hui; Yang, Wei‐En; Sun, Ke

doi:10.1002/app.39844

Cited by 38 publications

(22 citation statements)

References 35 publications

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“…After a predetermined period of storage time (up to one year), the samples were taken out and then heated to their previous programming temperature for shape recovery. We did not heat the programmed samples in a step-by-step manner as in our previous works to characterize other engineering polymers [13][14][15][16], since the shape recovery of this PMMA upon heating to 130 • C is always about 100% [46,47,56]. Each test was repeated four times.…”

Section: Shape Memory Performancementioning

confidence: 99%

“…[1][2][3][4][5]. In addition to a lot of purposely developed ones [6][7][8][9][10][11], many conventional engineering polymers have been confirmed to have excellent SME, in particular heat-induced (heating-responsive) SME [12][13][14][15][16][17][18][19][20]. The phenomenon of the SME provides an additional dimension to reshape product design in many ways [6,21,22].…”

Section: Introductionmentioning

confidence: 99%

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Influence of Long-Term Storage on Shape Memory Performance and Mechanical Behavior of Pre-stretched Commercial Poly(methyl methacrylate) (PMMA)

et al. 2019

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In this paper, we experimentally investigate the influence of storage at 40 • C on the shape memory performance and mechanical behavior of a pre-stretched commercial poly(methyl methacrylate) (PMMA). This is to simulate the scenario in many applications. Although this is a very important topic in engineering practice, it has rarely been touched upon so far. The shape memory performance is characterized in terms of the shape fixity ratio (after up to one year of storage) and shape recovery ratio (upon heating to previous programming temperature). Programming in the mode of uniaxial tension is carried out at a temperature within the glass transition range to one of four prescribed programming strains (namely 10%, 20%, 40% and 80%). Also investigated is the residual strain after heating for shape recovery. The characterization of the mechanical behavior of programmed samples after storage for up to three months is via cyclic uniaxial tensile test. It is concluded that from an engineering application point view, for this particular PMMA, programming should be done at higher temperatures (i.e., above its T g of 110 • C) in order to not only achieve reliable and better shape memory performance, but also minimize the influence of storage on the shape memory performance and mechanical behavior of the programmed material. This finding provides a useful guide for engineering applications of shape memory polymers, in particular based on the multiple-shape memory effect, temperature memory effect, and/or low temperature programming.2 of 12 applications [34][35][36][37][38][39][40], activation of the SME may not be carried out right after programming, but after a period of storage. As such, we need to consider the influence of aging at around room temperature after programming [41], which is a topic that has been less explored so far [42,43], but that is utterly important from an engineering application point of view.The purpose of this paper is to experimentally investigate the influence of storage at 40 • C on the shape memory performance and mechanical behavior of a commercial poly(methyl methacrylate) (PMMA), which is a typical engineering polymer, used in many applications, including optical lens [44,45] and plastic screw. This particular PMMA has been verified to have excellent heating-responsive SME in our previous studies (e.g., in [46,47]), and unlike some moisture/water-responsive SMPs (e.g., the polyurethane reported in [48]), it appears to be non-sensitive to moisture in air. PMMA and polycarbonates (PC) are typical amorphous polymer, and their SME was reported over 20 years ago [49,50]. Both experimental investigation and simulation on the SME of amorphous polymers (without chemical cross-linking, but via physical cross-linking) have been well documented in the literature (e.g., in [41,51-53]). Different programming temperatures (all within the glass transition range) and programming strains (up to 80%, in the mode of uniaxial tension) are applied in this study, as they have been identified to be influential para...

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Section: Shape Memory Performancementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of Long-Term Storage on Shape Memory Performance and Mechanical Behavior of Pre-stretched Commercial Poly(methyl methacrylate) (PMMA)

et al. 2019

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“…So that it is not limited to shape memory alloys only, but all types of shape memory materials, even those conventional materials, such as many engineering polymers [13,15,16]; -The techniques to design/tailor the shape memory function of a material to meet the requirement(s) of a particular application [12]; -The techniques to optimize the shape memory performance [17].…”

Section: Advanced Shape Memory Technologymentioning

confidence: 99%

Advanced Shape Memory Technology for Comfort Fitting

Wang¹,

Chen²,

Huang³

2017

Proceedings of the Second International Conference on Mechanics, Materials and Structural Engineering (ICMMSE 2017)

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Abstract. Nowadays, more and more people are keening to invest in their own personal fitness. Instead of producing customized products according to the actual dimensions of individuals, which could be highly expensive and complicate, advanced shape memory technology could be utilized to achieve one-size-for-all in a cost effective manner using well-established existing technologies. In this paper, first the concept of advanced shape memory technology is briefly introduced, together with the working principle. Some typical applications are presented here to demonstrate the potential benefits of this approach.

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“…In this test, a piece of square-shaped SMG-40 is impressed at its two corners at 65°C and 80°C, respectively, using two different molds to produce two indents, namely (b) and (a) in Figure 10.19. To name a few, anti-counterfeit labels and overheating temperature detecting are two among many other possibilities [23,24]. Upon immersing into 70°C water, indent (a) impressed at 65°C largely disappears, while indent (b) mainly remains.…”

Section: Heating-responsive Smementioning

confidence: 99%

Rubber-like polymeric shape memory hybrids with repeatable heat-assisted, self-healing, and joule heating functions

Huang

Ding

et al. 2015

Recent Advances in Smart Self-Healing Polymers and Composites

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Characterization of the thermoresponsive shape‐memory effect in poly(ether ether ketone) (PEEK)

Cited by 38 publications

References 35 publications

Influence of Long-Term Storage on Shape Memory Performance and Mechanical Behavior of Pre-stretched Commercial Poly(methyl methacrylate) (PMMA)

Influence of Long-Term Storage on Shape Memory Performance and Mechanical Behavior of Pre-stretched Commercial Poly(methyl methacrylate) (PMMA)

Advanced Shape Memory Technology for Comfort Fitting

Rubber-like polymeric shape memory hybrids with repeatable heat-assisted, self-healing, and joule heating functions

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