Fabrication of Liquid Crystalline Polyurethane Networks with a Pendant Azobenzene Group to Access Thermal/Photoresponsive Shape-Memory Effects

2017 ◽  
Vol 9 (29) ◽  
pp. 24947-24954 ◽  
Author(s):  
Zhi-Bin Wen ◽  
Dan Liu ◽  
Xiao-Yang Li ◽  
Chen-Hui Zhu ◽  
Ren-Fan Shao ◽  
...  
Keyword(s):  
Shape Memory ◽  
Liquid Crystalline ◽  
Memory Effects ◽  
Azobenzene Group ◽  
Polyurethane Networks ◽  
Shape Memory Effects

Study on Shape Memory Effects of LC Epoxy Resins with Lateral Substituents

2010 ◽  
Vol 428-429 ◽  
pp. 391-393 ◽  
Author(s):  
Li Yan Liang ◽  
De Wen Zhou ◽  
Man Geng Lu
Keyword(s):  
Shape Memory ◽  
Dynamic Mechanical Analysis ◽  
Epoxy Resins ◽  
Liquid Crystalline ◽  
Mechanical Analysis ◽  
Memory Effects ◽  
Ordered Structures ◽  
Alkyl Groups ◽  
Shape Memory Properties ◽  
Shape Memory Effects

A series of shape memorized liquid crystalline epoxides with different length of lateral substituents were prepared with several kinds of hardener. The dynamic mechanical analysis and the sharp memory properties of the resulted LC epoxy resins were studied by POM, WAXD, DSC and DMA. The results showed that the modulus in the rubbery region (ER) of the LC epoxides decreases as the length of lateral alkyl groups increases. And the shape memory properties were strongly impacted not only by the length of lateral substituents, but also by the kinds of hardener. The recovering speeds of the shape-memory liquid crystalline epoxides decrease as the increasing length of lateral alkyl groups. And recovering speeds of LC epoxides cured with aromatic amine (DDM) are faster than that of LC epoxides cured with anhydride (THHPA). The local ordered structures and the lateral substituents played an important role in shape memory effects.

Development of liquid crystalline polyurethane composites with stage-responsive shape memory effects

2018 ◽  
Vol 9 (5) ◽  
pp. 576-583 ◽  
Author(s):  
Shaojun Chen ◽  
Jianfeng Ban ◽  
Luona Mu ◽  
Haitao Zhuo
Keyword(s):  
Shape Memory ◽  
Polymer Composites ◽  
Liquid Crystalline ◽  
Shape Memory Polymer ◽  
Memory Effects ◽  
Shape Memory Properties ◽  
Shape Memory Effects ◽  
Polyurethane Composites

Novel liquid crystalline shape memory polymer composites with interesting staging-responsive shape memory properties were successfully prepared. The liquid crystalline shape memory polymer composites maintain the intrinsic reversible liquid crystalline properties of Azo11.

Liquid crystalline polyurethane composites based on supramolecular structure with reversible bidirectional shape memory and multi-shape memory effects

2019 ◽  
Vol 43 (1) ◽  
pp. 103-110 ◽  
Author(s):  
Funian Mo ◽  
Jianfeng Ban ◽  
Lulu Pan ◽  
Bo Shi ◽  
Shaorong Lu
Keyword(s):  
Shape Memory ◽  
Supramolecular Structure ◽  
Liquid Crystalline ◽  
Memory Effects ◽  
Molar Ratio ◽  
Shape Memory Effects ◽  
Polyurethane Composites

In this study, a novel series of supramolecular liquid crystalline (LC) polyurethane composites, named SMPU–#HOBA (# represents the molar ratio of HOBA/BINA), were successfully prepared by incorporating hexadecyloxybenzoic acid (HOBA) into pyridine-containing polyurethane (PU).

Soybean Oil-Based Polyurethane Networks: Shape-Memory Effects and Surface Morphologies

2013 ◽  
Vol 90 (9) ◽  
pp. 1415-1421 ◽  
Author(s):  
Shida Miao ◽  
Nicholas Callow ◽  
Ping Wang ◽  
Youyan Liu ◽  
Zhiguo Su ◽  
...  
Keyword(s):  
Soybean Oil ◽  
Shape Memory ◽  
Memory Effects ◽  
Polyurethane Networks ◽  
Shape Memory Effects ◽  
Surface Morphologies

scholarly journals Polyurethane networks based on disulfide bonds: from tunable multi-shape memory effects to simultaneous self-healing

2018 ◽  
Vol 62 (3) ◽  
pp. 437-447 ◽  
Author(s):  
Xiao-Ying Deng ◽  
Hui Xie ◽  
Lan Du ◽  
Cheng-Jie Fan ◽  
Chuan-Ying Cheng ◽  
...  
Keyword(s):  
Shape Memory ◽  
Disulfide Bonds ◽  
Memory Effects ◽  
Self Healing ◽  
Polyurethane Networks ◽  
Shape Memory Effects

scholarly journals Harnessing reversible dry adhesion using shape memory polymer microparticles

RSC Advances ◽  
2021 ◽  
Vol 11 (32) ◽  
pp. 19616-19622
Author(s):  
Wenbing Li ◽  
Junhao Liu ◽  
Wanting Wei ◽  
Kun Qian
Keyword(s):  
Shape Memory ◽  
Shape Memory Polymer ◽  
Shape Memory Polymers ◽  
Memory Effects ◽  
Reversible Adhesion ◽  
Dry Adhesion ◽  
Bonding Property ◽  
Shape Memory Effects ◽  
Polymer Microparticles

Shape memory polymers can provide excellent bonding property because of their shape memory effects. This paper proposes an adhesive unit that is capable of repeatable smart adhesion and exhibits reversible adhesion under heating.

Multi-shape-memory effects in a wavelength-selective multicomposite

2015 ◽  
Vol 3 (26) ◽  
pp. 13953-13961 ◽  
Author(s):  
Li Yu ◽  
Qian Wang ◽  
Jian Sun ◽  
Chenyue Li ◽  
Cheng Zou ◽  
...  
Keyword(s):  
Shape Memory ◽  
Memory Effects ◽  
Shape Memory Effects

Tuneable shape-memory effects can be achieved in a wavelength-selective multicomposite.

Polyurethane foam/silica chemical hybrids for shape memory effects

2012 ◽  
Vol 27 (22) ◽  
pp. 2837-2843 ◽  
Author(s):  
S.M. Kang ◽  
M.J. Kim ◽  
S.H. Kwon ◽  
H. Park ◽  
H.M. Jeong ◽  
...  
Keyword(s):  
Shape Memory ◽  
Polyurethane Foam ◽  
Memory Effects ◽  
Shape Memory Effects ◽  
Image Position

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