Synthesis and characterization of sisal fibre polyurethane network cross-linked with triple-shape memory properties

2018 ◽  
Vol 42 (9) ◽  
pp. 7130-7137 ◽  
Author(s):  
Lulu Pan ◽  
Zhongqiang Xiong ◽  
Laifu Song ◽  
Jianfeng Ban ◽  
Shaorong Lu
Keyword(s):  
Shape Memory ◽  
Shape Recovery ◽  
Shape Memory Polymer ◽  
Synthesis And Characterization ◽  
Sisal Fibre ◽  
High Elasticity ◽  
Shape Memory Properties ◽  
Triple Shape Memory

In this paper, a thermo-responsive network shape-memory polymer (SMP) which has high elasticity, triple shape-memory properties and rapid shape recovery effects was reported.

Synthesis and characterization of a novel biodegradable thermoplastic shape memory polymer

2009 ◽  
Vol 63 (3-4) ◽  
pp. 347-349 ◽  
Author(s):  
Yuanliang Wang ◽  
Yonggang Li ◽  
Yanfeng Luo ◽  
Meina Huang ◽  
Zhiqing Liang
Keyword(s):  
Shape Memory ◽  
Shape Memory Polymer ◽  
Synthesis And Characterization

A tough shape memory polymer with triple-shape memory and two-way shape memory properties

2014 ◽  
Vol 2 (13) ◽  
pp. 4771 ◽  
Author(s):  
Yongkang Bai ◽  
Xinrui Zhang ◽  
Qihua Wang ◽  
Tingmei Wang
Keyword(s):  
Shape Memory ◽  
Shape Memory Polymer ◽  
Shape Memory Properties ◽  
Triple Shape Memory

Synthesis and characterization of hydrophilic polyester-PEO networks with shape-memory properties

2010 ◽  
Vol 22 (12) ◽  
pp. 2430-2438 ◽  
Author(s):  
Yakai Feng ◽  
Shifeng Zhang ◽  
Li Zhang ◽  
Jintang Guo ◽  
Yongshen Xu
Keyword(s):  
Shape Memory ◽  
Synthesis And Characterization ◽  
Shape Memory Properties

Shape Memory Properties of Ti-Ni Shape Memory Alloy / Shape Memory Polymer Composites Using Additive Manufacturing

2021 ◽  
Vol 1016 ◽  
pp. 697-701
Author(s):  
Kazuhiro Kitamura
Keyword(s):  
Shape Memory ◽  
Transformation Temperature ◽  
Shape Recovery ◽  
Shape Memory Polymer ◽  
Shape Memory Polymers ◽  
The Other ◽  
3D Printer ◽  
Shape Memory Material ◽  
Polymer Resin ◽  
Shape Memory Properties

Shape memory alloys (SMAs) have the disadvantage that cooling is difficult and the actuating speed during cooling is slow. To resolve this problem, shape memory material actuators that operate only with heating is required. SMAs are characterized by a low apparent Young's modulus below the transformation temperature and a strong shape recovery force above the reverse transformation temperature. Alternatively, shape memory polymers (SMPs) have two properties: shape fixability and shape recovery. The SMPs are hardened below the glass transition (Tg) temperature and the material is recovered to memorized shape above the Tg temperature. The other hand, 3D printer is a machine that can directly output a 3D-designed product designed by a computer in 3D, and molded materials such as polymer, resin, metal, and ceramics. In this research, we developed the SMC of SMA wire and SMP sheet using adhesive that develops actuates into two shapes only by heating.

Synthesis and characterization of poly(carbonate urethane) networks with shape-memory properties

2009 ◽  
Vol 112 (1) ◽  
pp. 473-478 ◽  
Author(s):  
Yakai Feng ◽  
Yan Xue ◽  
Jintang Guo ◽  
Lei Cheng ◽  
Licai Jiao ◽  
...  
Keyword(s):  
Shape Memory ◽  
Synthesis And Characterization ◽  
Shape Memory Properties ◽  
Poly Carbonate

scholarly journals 4D Printing and Characterization of Shape Memory Polymer (SMP) Based Smart Gripper

2020 ◽  
Vol 5 (10) ◽  
pp. 1204-1211
Author(s):  
Francis Irungu Maina ◽  
Nahashon Osinde ◽  
Japheth Ka’pesha Odira ◽  
Patrick Kariuki Wanjiru ◽  
Margaret Wanjiku Mwangi
Keyword(s):  
Shape Memory ◽  
Recovery Rate ◽  
Shape Recovery ◽  
Shape Memory Polymer ◽  
Print Quality ◽  
Stimuli Responsive ◽  
4D Printing ◽  
Printing Parameters ◽  
Made In

Shape Memory Polymer (SMP) is stimuli-responsive material with the ability to recover the original shape from a deformation upon triggering by an appropriate stimulus like heat, light, and electricity. The shape recovery properties can be harnessed through 4D printing of self-recoverable functional structures and made usable in fields like medicine and robotics. To investigate the recovery properties, best printing parameters and optimal sizes, 4D reconfigurable gripper designed in CAD was printed in Ultimaker 2 Printer. Different stencils were made in varying printing parameters of temperature, infill, speed and time. Analysis for the stencils proved best print quality at a temperature of 195 °C and nozzle retract speed of 40mm/s. Shape recovery characterization was done on MATLAB. A printing temperature of 203 °C, infill density of 38% and printing speed of 40 mm/s gave the gripper with the best print quality. Characterization of the varying performances of the four grippers was attributed to the different infill percentages. The lower the infill, the higher the recovery rate due to the low stiffness of the gripper. The best recovery rate of 96.93% was associated with an optimal printing temperature of 203 °C.

scholarly journals In Situ Generation of Green Hybrid Nanofibrillar Polymer-Polymer Composites—A Novel Approach to the Triple Shape Memory Polymer Formation

Polymers ◽  
2021 ◽  
Vol 13 (12) ◽  
pp. 1900
Author(s):  
Ramin Hosseinnezhad ◽  
Iurii Vozniak ◽  
Fahmi Zaïri
Keyword(s):  
Polymer Blends ◽  
Shape Memory ◽  
Shape Memory Polymer ◽  
Cellulose Nanofibers ◽  
Polymeric Materials ◽  
Novel Approach ◽  
Phase Transition Temperatures ◽  
Triple Shape Memory

The paper discusses the possibility of using in situ generated hybrid polymer-polymer nanocomposites as polymeric materials with triple shape memory, which, unlike conventional polymer blends with triple shape memory, are characterized by fully separated phase transition temperatures and strongest bonding between the polymer blends phase interfaces which are critical to the shape fixing and recovery. This was demonstrated using the three-component system polylactide/polybutylene adipateterephthalate/cellulose nanofibers (PLA/PBAT/CNFs). The role of in situ generated PBAT nanofibers and CNFs in the formation of efficient physical crosslinks at PLA-PBAT, PLA-CNF and PBAT-CNF interfaces and the effect of CNFs on the PBAT fibrillation and crystallization processes were elucidated. The in situ generated composites showed drastically higher values of strain recovery ratios, strain fixity ratios, faster recovery rate and better mechanical properties compared to the blend.

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