Effects of main chain and acceptor content on phase behaviors of hydrogen-bonded main-chain/side-chain combined liquid crystalline polymers

Yang, Shuaiqi; Qu, Wenzhong; Pan, Hongbing; Zhang, Yudong; Zheng, Shijun; Fan, Xinghe; Shen, Zhihao

doi:10.1016/j.polymer.2016.01.018

Cited by 13 publications

(11 citation statements)

References 40 publications

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“…Tp‐based SCLCPs are comprised of four distinct structural units: the main chain, the spacer, the Tp discotic mesogenic group, and the tail . By making changes in the chemical structure, the phase transitions and phase structures of Tp‐based SCLCPs can be tailored accordingly, which make them useful for organic electronics and optoelectronic applications .…”

Section: Introductionmentioning

confidence: 99%

Influence of main chain on the phase behaviors of side‐chain liquid‐crystalline polymers with triphenylene mesogens of long alkyl tail substituents

Chen

Luo

et al. 2016

J. Polym. Sci. Part A: Polym. Chem.

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A series of side‐chain liquid‐crystalline polymers (SCLCPs) containing triphenylene mesogen, in which the long alkyl tail Tp connected directly with main chain, were synthesized successfully. The chemical structures of the monomers were confirmed by 1H NMR and mass spectrometry. The phase behaviors of polymers were investigated by a combination of techniques, including DSC, POM, 1D/2D WAXD, and SAXS. The experimental results suggested that the type of main chain played an important role in the LC phase structures of these polymers. Because of the steric effects of side chains and the coupling effects between the Tp moieties and the main chains, all the polymers exhibited columnar phase. However, the SCLCPs with poly(vinyl benzene methyl ether) or polynorbornene backbone displayed hexagonal columnar phase, while those with polyacrylate or polymethacrylate backbone presented columnar nematic phase, and the one with poly(vinyl benzoate) main chain showed rectangular columnar phase. Moreover, the clearing temperatures (Ti) changed with change in main chain. Especially, the Ti of the SCLCP with polymethacrylate backbone was above 300 °C. © 2016 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2017, 55, 754–766

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Section: Introductionmentioning

confidence: 99%

Influence of main chain on the phase behaviors of side‐chain liquid‐crystalline polymers with triphenylene mesogens of long alkyl tail substituents

Chen

Luo

et al. 2016

J. Polym. Sci. Part A: Polym. Chem.

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“…A series of PM1 and PM3 homopolymers with different MWs were synthesized according to the routes in Scheme a. The monomers M1 and M3 were synthesized and characterized by the same methods described in the literature . The kinetics of the reactions should be similar to that in our previous work .…”

Section: Resultsmentioning

confidence: 98%

“…2,5‐bis( tert ‐Butoxylcarbonyl)styrene (M1, in which 1 refers to one benzene ring in the monomer), 2,5‐bis(4‐ tert ‐butoxylcarbonyl phenyl)styrene (M3, in which 3 refers to three benzene rings in the monomer), and 2‐bromoisobutyrate‐terminated poly(dimethylsiloxane) (PDMS‐Br) were prepared as previously reported . N , N , N ′, N ″, N ″‐Pentamethyldiethylenetriamine (PMDETA, TCI, 98%) and (1‐bromoethyl)benzene ( TCI, 95%) were used as received.…”

Section: Methodsmentioning

confidence: 99%

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Tuning Structures of Mesogen‐Jacketed Liquid Crystalline Polymers and Their Rod–Coil Diblock Copolymers by Varying Chain Rigidity

Pan

Jing

Xiao

et al. 2018

Macro Chemistry & Physics

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Two mesogen‐jacketed liquid crystalline (LC) polymers with different rigid side‐chain cores, poly[2,5‐bis(tert‐butoxylcarbonyl)styrene] (PM1) and poly[2,5‐bis(4‐tert‐butoxylcarbonyl phenyl)styrene] (PM3), as well as their corresponding block copolymers (BCPs), poly(dimethylsiloxane)‐b‐PM1 (PDMS‐b‐PM1) and PDMS‐b‐PM3, are synthesized and characterized. The LC phase structures of the homopolymers and the microphase‐separated structures of the BCPs can be controlled by changing the rigidity of the polymer chains with the different rigid side‐chain cores used. The LC phase structure of PM1 homopolymer is dependent on its molecular weight (MW). On the other hand, PM3 is always amorphous below thermal decomposition temperature regardless of its MW, owing to much higher rigidity of PM3 compared with that of PM1. Although both BCPs can self‐assemble into lamellae (LAM) and hexagonally packed cylinders (HEX) with varying compositions, PDMS‐b‐PM3 can form the HEX structure at a smaller weight fraction of the PM3 block because PDMS‐b‐PM3 possesses a larger geometric asymmetric factor compared with PDMS‐b‐PM1. For PDMS‐b‐PM1 with a large enough MW, it can form hierarchically ordered nanostructures, including the LAM or HEX nanostructure of the BCP and the columnar nematic phase of the PM1 block.

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“…Because of the spatial requirement, the whole polymer chain is forced to form the extended conformation, which result in the formation of cylinder by the whole molecular chain. Thus, MJLCPs show the chemical structure of the typical side chain LCPs and the similar property of the main chain LCPs. − Meantime, the nonconjugated polymer using the MJLCPs as the main chain can lead to versatile hierarchical liquid crystalline structures, which can be benefit to improving processability and the performance of the device based on PDI. In addition, this kind of chemical structure is the first-time reported, which can provide a new method to fabricate the nonconjugated acceptor materials.…”

Section: Introductionmentioning

confidence: 99%

“Jacketing” Effect Liquid Crystalline Polymer with Perylenediimide as Side Chain: Synthesis, Liquid Crystalline Phase, and Photovoltaic Performances

Tao

Huang

Kuang

et al. 2018

ACS Appl. Energy Mater.

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All polymer solar cells (all-PSCs) is one of the important emerging renewable energy technologies. In this work, we use "jacketing" effect liquid crystalline polymer (LCP) with perylenediimide as side chain to fabricate all-PSCs. First, poly(2,5-bis{[6-(4-alkoxy-4′-perylenediimide)-6hexyl]oxycarbonyl}styrene) (abbreviated as PPDCS) is successfully synthesized via chain polymerization. The resultant polymer PPDCS forms stable smectic C (SmC) structure until decomposition. The electrochemical experiment indicates PPDCS shows deep LUMO energy level of −3.81 eV, thus, the nonconjugated PPDCS can be employed as acceptor materials to build all-PSCs. Atomic force microscopy (AFM) experiments show that the PBT7/PPDCS blend film forms a bicontinuous network-domains and the resultant film shows extensive absorption spectrum (300−800 nm) on UV−vis spectra. All-PSCs device fabricated by PTB7/PPDCS presents the best power conversion efficiency (PCE) of 1.23% after optimization, where the short-circuit current density (J sc ) is 4.34 mA cm −2 , an open-circuit voltage (V oc ) is 0.65 V, and a fill factor (FF) is 0.37. This work suggests that the nonconjugated LCP shows potential application for solar cell.

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Effects of main chain and acceptor content on phase behaviors of hydrogen-bonded main-chain/side-chain combined liquid crystalline polymers

Cited by 13 publications

References 40 publications

Influence of main chain on the phase behaviors of side‐chain liquid‐crystalline polymers with triphenylene mesogens of long alkyl tail substituents

Influence of main chain on the phase behaviors of side‐chain liquid‐crystalline polymers with triphenylene mesogens of long alkyl tail substituents

Tuning Structures of Mesogen‐Jacketed Liquid Crystalline Polymers and Their Rod–Coil Diblock Copolymers by Varying Chain Rigidity

“Jacketing” Effect Liquid Crystalline Polymer with Perylenediimide as Side Chain: Synthesis, Liquid Crystalline Phase, and Photovoltaic Performances

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