Polyurethane networks based on α,ω-dihydroxytelechelic and on random hydroxyl-functionalized side chain poly(2-chloroethyl vinyl ether)s: Synthesis and investigation of mechanical properties

1997 ◽  
Vol 198 (10) ◽  
pp. 3051-3064 ◽  
Author(s):  
Véronique Bennevault ◽  
Gilles Richard ◽  
Alain Deffieux
Keyword(s):  
Mechanical Properties ◽  
Vinyl Ether ◽  
Side Chain ◽  
Polyurethane Networks ◽  
Functionalized Side

scholarly journals Recyclable Self-Healing Polyurethane Cross-Linked by Alkyl Diselenide with Enhanced Mechanical Properties

Polymers ◽  
2019 ◽  
Vol 11 (5) ◽  
pp. 773 ◽  
Author(s):  
Yuqing Qian ◽  
Xiaowei An ◽  
Xiaofei Huang ◽  
Xiangqiang Pan ◽  
Jian Zhu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Room Temperature ◽  
Amide Bond ◽  
Self Healing ◽  
Healing Efficiency ◽  
Polyurethane Networks ◽  
Combined Action ◽  
Cross Linker ◽  
Dynamic Structures ◽  
External Interventions

Dynamic structures containing polymers can behave as thermosets at room temperature while maintaining good mechanical properties, showing good reprocessability, repairability, and recyclability. In this work, alkyl diselenide is effectively used as a dynamic cross-linker for the design of self-healing poly(urea–urethane) elastomers, which show quantitative healing efficiency at room temperature, without the need for any catalysts or external interventions. Due to the combined action of the urea bond and amide bond, the material has better mechanical properties. We also compared the self-healing effect of alkyl diselenide-based polyurethanes and alkyl disulfide-based polyurethanes. The alkyl diselenide has been incorporated into polyurethane networks using a para-substituted amine diphenyl alkyl diselenide. The resulting materials not only exhibit faster self-healing properties than the corresponding disulfide-based materials, but also show the ability to be processed at temperatures as low as 60 °C.

Dynamic mechanical properties of cyclohexane-based glass-forming liquid crystals and a linear side chain polymer analogue

1996 ◽  
Vol 20 (3) ◽  
pp. 277-282 ◽  
Author(s):  
Hongqin Shi ◽  
Shaw H. Chen ◽  
Mike E. De Rosa ◽  
Timothy J. Bunning ◽  
W. Wade Adams
Keyword(s):  
Mechanical Properties ◽  
Liquid Crystals ◽  
Dynamic Mechanical Properties ◽  
Side Chain ◽  
Chain Polymer ◽  
Dynamic Mechanical ◽  
Glass Forming

Dynamics of Liquid Crystalline Side-Chain Poly(Vinyl Ether)s

1996 ◽  
Vol 33 (10) ◽  
pp. 1555-1563 ◽  
Author(s):  
U. W. Gedde ◽  
F. Liu ◽  
C. Hellermark ◽  
A. Hult ◽  
F. Sahlén ◽  
...  
Keyword(s):  
Vinyl Ether ◽  
Liquid Crystalline ◽  
Side Chain

Structures and properties of side-chain liquid crystalline polynorbornenes containing an amide group: hydrogen bonding interactions and spacer length effects

2020 ◽  
Vol 11 (29) ◽  
pp. 4749-4759
Author(s):  
Dong Shi ◽  
Wen-Ying Chang ◽  
Xiang-Kui Ren ◽  
Shuang Yang ◽  
Er-Qiang Chen
Keyword(s):  
Mechanical Properties ◽  
Hydrogen Bond ◽  
Liquid Crystalline ◽  
Amide Group ◽  
Self Organization ◽  
Side Chain ◽  
Hydrogen Bond Interaction ◽  
Spacer Length ◽  
Hydrogen Bonding Interactions ◽  
Structures And Properties

Side-chain liquid crystalline polynorbornenes based on benzanilide mesogens exhibit rich self-organization behaviours and enhanced mechanical properties owing to the lateral hydrogen bond interaction that can be tuned by the spacer length.

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