Synthesis and characterization of photoactive poly(arylene ether sulfone)s containing azobenzene moieties in their main chains

Jiang, Xiangyu; Chen, Xingbo; Yue, Xigui; Zhang, Jingjing; Guan, Shaokang; Zhang, Haibo; Zhang, Wenyi; Chen, Qi‐Dai

doi:10.1016/j.reactfunctpolym.2010.05.007

Cited by 29 publications

(13 citation statements)

References 33 publications

(43 reference statements)

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“…Polymers investigated in these work exhibited an excellent residual weights at 800 C, in the range between 51 and 66%. This may indicate good flame-retardant characteristics associated with these polymers [37,38]. The calculated limited oxygen index (LOI) values using a linear relationship with char residue (CR): LOI ¼ 17.5 þ 0.4 CR [39,40] was in the range 38e41%.…”

Section: Thermal Propertiesmentioning

confidence: 99%

Thermal, optical, electrochemical, and electrochromic characteristics of novel polyimides bearing the Acridine Yellow moiety

Grucela-Zajac

Filapek

Skórka

et al. 2012

Materials Chemistry and Physics

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Section: Thermal Propertiesmentioning

confidence: 99%

Thermal, optical, electrochemical, and electrochromic characteristics of novel polyimides bearing the Acridine Yellow moiety

Grucela-Zajac

Filapek

Skórka

et al. 2012

Materials Chemistry and Physics

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“…This value may indicate their good flame-retardant properties. 25 The limited oxygen index values, which were calculated using a linear relation with the char residue, limited oxygen index ¼ 17.5 þ 0.4 char residue, 26,27 were in the range of 36-44%. Therefore, such polymers can also be classified as self-extinguishing polymers.…”

Section: Thermal Properties Of Peismentioning

confidence: 99%

Structure and properties of new highly soluble aromatic poly(etherimide)s containing isopropylidene groups

Wolińska‐Grabczyk

Schab‐Balcerzak

Grabiec

et al. 2013

Polym J

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A series of amorphous poly(etherimide)s (PEIs) was synthesized from 4,4 0 -(4,4 0 -isopropylidene-diphenoxy)bis(phthalic anhydride) and different diamines or from 4,4 0 -(4,4 0 -isopropylidene-diphenyl-1,1 0 -diyldioxy)dianiline and 4,4 0 -(hexafluoroisopropylidene)diphthalic anhydride. The structures of the obtained PEIs were confirmed by Fourier transform infrared spectroscopy (FTIR), 1 H and 13 C nuclear magnetic resonance spectroscopies ( 1 H and 13 C NMR) and by elemental analysis. These polymers show excellent solubility in a broad range of solvents and produce strong and flexible films. The films were examined using differential scanning calorimetry (DSC), dynamic mechanical analysis (DMA), thermogravimetric analysis (TGA), wide-angle X-ray diffraction (WAXD) and mechanical testing, and were characterized by gas transport measurements. The obtained films exhibit thermal stability up to 500 1C, good mechanical properties and a CO 2 permeability of 7.85 Barrer with a CO 2 /N 2 selectivity of 21.2 for the polymer that contains hexafluoroisopropylidene moieties. The effects of the chemical structures on the physical and gas permeation properties were studied. The introduction of bulky cardo or hexafluoroisopropylidene moieties into the polymer chain increases the glass transition temperature (T g ) and fractional free volume (FFV), while the incorporation of additional ether linkages produces the opposite effect. Using an existing free volume approach, we found that the permeabilities of the studied PEIs are well correlated with their FFVs. Polymer Journal (2013) 45, 1202-1209; doi:10.1038/pj.2013.49; published online 22 May 2013 Keywords: gas transport properties; poly(etherimide)s; polyimides; thermal properties INTRODUCTION Aromatic polyimides (PIs) were first produced in 1908; since then, interest in this type of polymers has been growing because of their exceptional properties, such as excellent thermal, thermo-oxidative and dimensional stability; high radiation and solvent resistance; low dielectric constant; and unusually good mechanical properties. [1][2][3] This unique combination of properties makes PIs ideal for a variety of applications, for example, in microelectronics, microelectromechanical systems, aerospace and photoelectronics or as gas separation membranes, materials for memory devices, alignment layers in liquid crystal displays, and redox-active, electrochromic polymers. 3-6 Although many excellent polyimides are known and commercially available, new polyimides are emerging as research continues on the chemical structure-property correlations and on the search for new compounds with unique combinations of properties for special applications. Recently, particular attention has been paid to new materials and technologies for gas separation applications because of environmental concerns and economic interests. Polymeric gas separation membranes exhibit good mechanical properties, often

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“…19 Our group has developed several novel, functional PAEs, including through the use of direct copolymerization, a post-functional reaction, and investigated their corresponding optical and electrical properties. [20][21][22][23][24][25] Polymers containing azobenzene groups have been considered as promising materials for optical data storage, electro-optical modulators, and in other electro-optic areas, due to the photosensitive trans-cis isomerization and orientation effects of the azobenzene chromophores. Aside from the optical properties, the electronic properties of azobenzene groups, as the conjugated moiety, can be tuned.…”

Section: Introductionmentioning

confidence: 99%

Resistive memory devices based on novel functionalized poly(aryl ether)s with pendant azobenzene

Sun

Zhang

Pang

et al. 2018

High Performance Polymers

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We designed and synthesized two novel azobenzene functionalized poly(aryl ether)s (PAEs), PAE-azo-1 and PAE-azo-2, from a new azobenzene monomer via nucleophilic aromatic substitution polycondensation. This direct polymerization approach via azobenzene monomer has the advantages of controlling the distribution and amount of the azobenzene chromophores in the polymer. Both of the polymers showed very good thermal stability and excellent solubility for future application in the electronics industry. These polymers were fabricated as films by simple spin-coating and both of them were then prepared as sandwich memory devices. PAE-azo-1 and PAE-azo-2 exhibit write-once-read-many-times-type memory behavior, which can be encoded as “0” and “1,” and possess the low operation voltage below −3.0 V. The memory mechanism was investigated through ultraviolet–visible optical absorption spectrum and the cyclic voltammetry. These obtained results indicate that the novel azobenzene functionalized PAEs are a promising candidate for low power consumption and high-performance materials for data storage.

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Synthesis and characterization of photoactive poly(arylene ether sulfone)s containing azobenzene moieties in their main chains

Cited by 29 publications

References 33 publications

Thermal, optical, electrochemical, and electrochromic characteristics of novel polyimides bearing the Acridine Yellow moiety

Thermal, optical, electrochemical, and electrochromic characteristics of novel polyimides bearing the Acridine Yellow moiety

Structure and properties of new highly soluble aromatic poly(etherimide)s containing isopropylidene groups

Resistive memory devices based on novel functionalized poly(aryl ether)s with pendant azobenzene

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