Photoresponsive side-chain liquid crystalline polymers with an easily cross-linkable azobenzene mesogen

Li, Xinjuan; Wen, Ruibin; Zhang, Ying; Zhu, Liya; Zhang, Baolong; Zhang, Huiqi

doi:10.1039/b812291a

Cited by 58 publications

(57 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This result indicated the full overlap of the side chains in an interdigitated packing structure, as shown in the insets of Fig. 3 [21]. In addition, the first-order reflection peak is very weak and the second-order reflection peak is the most intense.…”

Section: Resultsmentioning

confidence: 74%

Photoresponding ionic complex containing azobenzene chromophore for use in birefringent film

Lü

Feng

et al. 2014

Chinese Chemical Letters

View full text Add to dashboard Cite

Section: Resultsmentioning

confidence: 74%

Photoresponding ionic complex containing azobenzene chromophore for use in birefringent film

Lü

Feng

et al. 2014

Chinese Chemical Letters

View full text Add to dashboard Cite

“…4-((4-Hydroxy)phenylazo)benzoic acid, 4-((4--hydroxyalkyloxy)phenylazo)benzoic acid (HAzoA-m (m = 2, 6, 10)), and 4-((4-(-acryloyloxyalkyloxy))phenylazo)benzoic acid 35 (AAzoA-m (m = 2, 6, 10)) were synthesized following our previous procedure (Scheme 1). [67][68][69] All the other reagents were commercially available and used without further purification unless otherwise stated.…”

Section: Methodsmentioning

confidence: 99%

“…71 Recently, we have synthesized a series of methacrylate type azo monomers with an N-hydroxysuccinimide 25 carboxylate substituent and their homopolymers by the free radical polymerization. 68 The obtained azo polymer films proved to be crosslinkable with 1,6-hexanediamine in methanol, but such post-crosslinking process was still relatively slow (about 1 h), probably due to the rigid characteristics of poly(methacrylate) 30 type azo polymers. In addition, the resulting azo polymers had rather high Tg values (≥ 102 o C as determined by DSC at the second heating processes with a heating rate of 10 o C/min), which might prevent their fast formation of SRGs.…”

Section: Synthesis and Characterization Of Azo Polymersmentioning

confidence: 98%

Easily crosslinkable side-chain azobenzene polymers for fast and persistent fixation of surface relief gratings

et al. 2015

Self Cite

View full text Add to dashboard Cite

A series of side-chain azobenzene (azo) homo-and copolymers with easily crosslinkable Nhydroxysuccinimide carboxylate-substituted azo moieties and relatively low glass transition temperatures were synthesized for rapid and persistent fixation of surface relief gratings (SRGs). These azo polymers exhibited good thermal stability and their films proved easily crosslinkable within 4-15 min with 1,6-hexanediamine under mild conditions with the crosslinking rates of copolymer films being faster than 10 homopolymer films. Moreover, the formation speed and saturation modulation depth of the photoinduced SRGs increased both with a decrease in the flexible spacer length in azo homopolymers and with an increase in the azo contents in copolymers. Furthermore, considerably stabilized high quality SRGs were obtained after their post-fixation by crosslinking, as revealed by the negligible or rather small change of both the modulation depth of the crosslinked SRGs upon their exposure to high temperatures or organic 15 solvents and the transparency of the crosslinked polymer films.

show abstract

“…The second route starts with a liquid crystalline polymer that contains additional functional groups. This polymer is mixed with a bi- or multi-functional crosslinking agent that can react selectively with these functional groups under defined reaction conditions, leading to network formation [19–23]. This pathway has the advantage that the LC polymers can be purified and characterized before the crosslinking step.…”

Section: The Synthesis and Fabrication Of Lce Materialsmentioning

confidence: 99%

Actuators based on liquid crystalline elastomer materials

2013

View full text Add to dashboard Cite

Liquid crystalline elastomers (LCEs) exhibit a number of remarkable physical effects, including the unique, high-stroke reversible mechanical actuation when triggered by external stimuli. This article reviews some recent exciting developments in the field of LCEs materials with an emphasis on their utilization in actuator applications. Such applications include artificial muscles, industrial manufacturing, health and microelectromechanical systems (MEMS). With suitable synthetic and preparation pathways and well-controlled actuation stimuli, such as heat, light, electric and magnetic field, excellent physical properties of LCE materials can be realized. By comparing the actuating properties of different systems, general relationships between the structure and the property of LCEs are discussed. How these materials can be turned into usable devices using interdisciplinary techniques is also described.

show abstract

Photoresponsive side-chain liquid crystalline polymers with an easily cross-linkable azobenzene mesogen

Cited by 58 publications

References 45 publications

Photoresponding ionic complex containing azobenzene chromophore for use in birefringent film

Photoresponding ionic complex containing azobenzene chromophore for use in birefringent film

Easily crosslinkable side-chain azobenzene polymers for fast and persistent fixation of surface relief gratings

Actuators based on liquid crystalline elastomer materials

Contact Info

Product

Resources

About