Body temperature-responsive two-way and moisture-responsive one-way shape memory behaviors of poly(ethylene glycol)-based networks

2017 ◽  
Vol 8 (25) ◽  
pp. 3833-3840 ◽  
Author(s):  
Guang Yang ◽  
Xueyang Liu ◽  
Alfred Iing Yoong Tok ◽  
Vitali Lipik
Keyword(s):  
Free Radical ◽  
Ethylene Glycol ◽  
Shape Memory ◽  
Shape Memory Polymer ◽  
Polymer Networks ◽  
Poly Ethylene Glycol ◽  
Thermally Induced ◽  
Temperature Responsive ◽  
Shape Memory Effects ◽  
Poly Ethylene

In this work, crosslinked shape-memory polymer networks were prepared by thermally induced free-radical polymerizations of methacrylate-terminated poly(ethylene glycol) (PEG) and n-butyl acrylate (BA), which integrate thermal-responsive two-way and moisture-responsive one-way shape memory effects (SME).

A new approach to shape memory polymer: design and preparation of poly(methyl methacrylate) composites in the presence of star poly(ethylene glycol)

Soft Matter ◽  
2011 ◽  
Vol 7 (5) ◽  
pp. 1641 ◽  
Author(s):  
Tuo Liu ◽  
Jing Li ◽  
Yi Pan ◽  
Zhaohui Zheng ◽  
Xiaobin Ding ◽  
...  
Keyword(s):  
Ethylene Glycol ◽  
Methyl Methacrylate ◽  
Shape Memory ◽  
Shape Memory Polymer ◽  
Poly Ethylene Glycol ◽  
New Approach ◽  
Poly Methyl Methacrylate ◽  
Poly Ethylene

Shape memory behavior and mechanism of poly(methyl methacrylate) polymer networks in the presence of star poly(ethylene glycol)

RSC Advances ◽  
2014 ◽  
Vol 4 (37) ◽  
pp. 19273 ◽  
Author(s):  
Xingjian Li ◽  
Tuo Liu ◽  
Yaru Wang ◽  
Yi Pan ◽  
Zhaohui Zheng ◽  
...  
Keyword(s):  
Ethylene Glycol ◽  
Methyl Methacrylate ◽  
Shape Memory ◽  
Polymer Networks ◽  
Poly Ethylene Glycol ◽  
Poly Methyl Methacrylate ◽  
Shape Memory Behavior ◽  
Poly Ethylene

A novel shape memory polymer based on conetworks

e-Polymers ◽  
2009 ◽  
Vol 9 (1) ◽  
Author(s):  
Zonghui Li ◽  
Yi Pan ◽  
Peng Zhang ◽  
Zhaohui Zheng ◽  
Xiaobin Ding ◽  
...  
Keyword(s):  
Glass Transition ◽  
Shape Memory ◽  
Shape Memory Polymer ◽  
Recovery Ratio ◽  
Modulus Ratio ◽  
Poly Ethylene Glycol ◽  
Shape Memory Properties ◽  
Shape Memory Effects ◽  
Shape Memory Materials ◽  
Poly Ethylene

AbstractA novel shape memory polymer based on conetworks (CNs) was synthesized. These conetworks consisting of poly(methyl methacrylate) and poly (ethylene glycol) diacrylates showed excellent shape-memory properties with a recovery ratio of nearly 100%. Moreover, different shape memory effects were discovered in different mediums due to their amphiphilic properties. In addition, a large storage modulus ratio above and below the glass transition temperature(Eratio), which probably means excellent shape memory effect, were obtained due to the designed CN structure whether crystallization existed or not. It is quite different from the traditional methods to achieve large Eratio values. The versatility of shapememory conetworks potentially provides us a new route to prepare shape memory materials.

Dual-responsive hybrid thermoplastic shape memory polyurethane

2017 ◽  
Vol 1 (4) ◽  
pp. 767-779 ◽  
Author(s):  
Benjamin Qi Yu Chan ◽  
Sylvester Jun Wen Heng ◽  
Sing Shy Liow ◽  
Kangyi Zhang ◽  
Xian Jun Loh
Keyword(s):  
Ethylene Glycol ◽  
Shape Memory ◽  
Shape Memory Polymer ◽  
Poly Ethylene Glycol ◽  
Dual Responsive ◽  
Poly Ethylene ◽  
Shape Memory Polyurethane

A urethane-based dual-responsive shape memory polymer (SMP) comprising poly(ethylene glycol) (PEG), poly(ε-caprolactone) (PCL) and poly(dimethylsiloxane) (PDMS) was prepared.

scholarly journals Water Triggered Shape Memory Materials

2013 ◽  
Vol 3 (1) ◽  
pp. 49-50 ◽  
Author(s):  
Guoguang Niu
Keyword(s):  
Shape Memory ◽  
Shape Recovery ◽  
Shape Memory Polymers ◽  
Electrical Current ◽  
Light Illumination ◽  
Poly Ethylene Glycol ◽  
Thermally Induced ◽  
Permanent Shape ◽  
Poly Ethylene ◽  
Novel Strategy

The term "shape memory effect" refers to the ability of a material to be deformed and fixed into a temporary shape, and to recover its original, permanent shape upon an external stimulus (1). Shape memory polymers have attracted much interest because of their unique properties, and applied tremendously in medical area, such as biodegradable sutures, actuators, catheters and smart stents (2, 3). Shape memory usually is a thermally induced process, although it can be activated by light illumination, electrical current, magnetic, or electromagnetic field (4-6). During the process, the materials are heated directly or indirectly above their glass transition temperature (Tg) or the melting temperature (Tm) in order to recover the original shape. Non-thermally induced shape memory polymers eliminate the temperature constrains and enable the manipulation of the shape recovered under ambient temperature (7, 8). Herein, we report a novel strategy of water induced shape memory, in which the formation and dissolution of poly(ethylene glycol) (PEG) crystal is utilized for the fixation and recovery of temporary deformation of hydrophilic polymer. This water-induced shape recovery is less sensitive to temperature, of which 95% deformation is fixed in circumstance and over 75% recovery is reached even at 0 oC.

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