Synthesis and properties of a high‐molecular‐weight poly(amic acid) and polyimide based on 2,2‐bis(3‐amino‐4‐hydroxyphenyl)hexafluoropropane

Zheng, Yanhong; Zhang, Yu; Li, Guangzhu; Guo, Baohua; Zeng, Xin; Wang, Liancai; Yu, Huiwen; Guo, Jiaxiu

doi:10.1002/app.33748

Cited by 17 publications

(17 citation statements)

References 19 publications

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“…An absorption band at 1,628-1,655 cm −1 corresponding to the Schiff base group (-CH=N-) is observed. The disappearance of the amide and carbonyl bands indicated a virtually complete conversion of the imide ring in polyimides [26].…”

Section: June 2011mentioning

confidence: 99%

Synthesis and thermal properties of polyimides containing azomethine linkage for processable high-performance engineering plastics

Iqbal¹,

Khosa²,

Jamal³

et al. 2014

Korean J. Chem. Eng.

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A new series of polyimides having azomethine functionality in backbone was synthesized by two-steps polycondensation method. Five substituted aromatic diamines--N-(4-aminobenzylidene)-2chloro-6-methylbenzene-1,4-diamine (DA1), N-(4-aminobenzylidene)-2-methoxybenzene-1,4-diamine (DA2), N-(4-aminobenzylidene)-2-methylbenzene-1,4-diamine (DA3), N-(4-aminobenzylidene)-3-methylbenzene-1,4-diamine (DA4) and N,(4-aminobenzylidene)-2-hydroxybenzene-1,4-diamine (DA5)--were prepared and condensed with 3,4,9,10-perylenetetracarboxylic dianhydride (PTCDA) to obtain poly(azomethine imide). All synthesized polyimides PI(1-5) were fully characterized by elemental analyses, FTIR, 1 H-NMR, having amorphous nature and are soluble in dmac, dmf, and dmso, m-cresol due to presence of azomethine functionality. The inherent viscosities and moisture absorption of all polyimides lie in the range of 0.65-0.85 dL gm −1 and 0.68-0.82% respectively. Thermal stability was assessed by 10% weight loss temperature and the degradation temperature of the resultant polymers falls in the ranges from 480-535 o C in nitrogen. The glass transition temperature was in the range of 225-330 o C. Due to above mentioned attractive properties, polyimidebased material are attractive for processable high-performance engineering plastics and starting material for fabrication of new polymers.

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Section: June 2011mentioning

confidence: 99%

Synthesis and thermal properties of polyimides containing azomethine linkage for processable high-performance engineering plastics

Iqbal¹,

Khosa²,

Jamal³

et al. 2014

Korean J. Chem. Eng.

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“…FTIR spectra of PI showed characteristic imide bands at 1780 and 1716 cm -1 (C=O stretching), 1355 cm -1 (C-N stretching), 832 and 716 cm -1 (C=O asymmetric stretching). An absorption at 1440-1660 cm -1 corresponding to the schiff base group (-CH=N-) is observed [8][9][10]. The thermal properties of the polyimides were evaluated by differential scanning calorimetry (DSC) ( Figure 4.…”

Section: Characterization Of the Pimentioning

confidence: 99%

“…Polyimides have been especially used widely in microelectronic, film, adhesive and membrane industry [3][4][5][6][7] due to these prior properties. Recently significant synthetic effort has been centered on improving processability and solubility through the synthesis of new diamine or dianhydride monomers [8][9][10]. In recent years, many polymers including conducting and nonconducting ones have been widely used for immobilization of enzymes at electrode surface [11][12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Synthesis, characterization of pyridine-based polyimides and their use as glucose oxidase immobilization media

Paşahan¹,

Köytepe

Ekinci³

2012

E-Polymers

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A novel diamine monomer, containing 2,6-diaminopyridine, bis-pdimethylaminophenyl-2,6-pyridine (S26DAP), was prepared from 4-(dimethylamino)benzaldehyde and 2,6-diaminopyridine. The monomer was characterized by FT-IR, NMR and elemental analyzer. The monomer was then utilized to prepare polyimides with dianhydrides such as pyromellitic dianhydride (PMDA), 3,3',4,4'-benzophenonetetracarboxylic dianhyride (BPDA), 4,4'-oxydiphthalic anhydride (ODPA) and 3,3',4,4'-biphenyltetracarboxylic dianhydride (BTDA) by the one-step method; synthesis of polyimides, followed by thermal imidization. The polyimides were characterized by FT-IR, GPC with intrinsic viscosity and adhesive properties also being evaluated. The polyimides exhibited high T g (°C) (186-209 °C), good thermal stability and good adhesive properties. Medium to high molecular weight polymers were attained, with inherent viscosities near or higher than 1.05-1.32 dL/g, the solubility in dipolar aprotic solvents of the polyimides were much better than that of the aromatic polyimides. Furthermore, chemically synthesized polyimides were used for immobilization of glucose oxidase (GOx). The amperometric responses of the prepared GOx-polyimide-coated electrodes to glucose were examined at a potential of 0.7 V in PBS solution by means of TB technique. The results show that polyimide (S26DAP-PI-4) can be used for immobilization of glucose oxidase.

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“…Aromatic polyimide (PI) has received considerable attention for its potential application in aerospace, microelectronics, optoelectronics, composites, and so on due to its low dielectric constant, excellent dimensional stability, strong solvent resistance, and outstanding thermal and mechanical properties . Since the Kapton ® PI films were commercialized by DuPont in the early 1960s, a number of aromatic PIs have been reported . Another significant PI product is P84 ® fiber which is famous for its clover‐leaf structure of cross section and excellent thermal properties .…”

Section: Introductionmentioning

confidence: 99%

The pyrolysis behaviors of ternary copolyimide derived from aromatic dianhydride and aromatic diisocyanates

Guo

Chen

et al. 2013

J of Applied Polymer Sci

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A polyimide (PI) based on benzophenone-3,3 0 ,4,4 0 -tetracarboxylic acid dianhydride, toluene diisocyanate (TDI), and 4,4 0 -methylenebis (phenyl isocyanate) (MDI) has been synthesized via a one-step polycondensation procedure. The resulting PI possessed excellent thermal stability with the glass transition temperature (T g ) 316 C, the 5% weight loss temperature (T 5% ) in air and nitrogen 440.4 C and 448.0 C, respectively. The pyrolysis behaviors were investigated with dynamic thermogravimetric analysis (TGA), TGA coupled with Fourier transform infrared spectrometry (TGA-FTIR) and TGA coupled with mass spectrometry (TGA-MS) under air atmosphere. The results of TGA-FTIR and TGA-MS indicated that the main decomposition products were carbon dioxide (CO 2 ), carbonic oxide (CO), water (H 2 O), ammonia (NH 3 ), nitric oxide (NO), hydrogen cyanide (HCN), benzene (C 6 H 6 ), and compounds containing NH 2 , CBN, N@C@O or phenyl groups. The activation energy (E a ) of the solid-state process was estimated using Ozawa-Flynn-Wall (OFW) method which resulted to be 143.8 and 87.8 kJ/mol for the first and second stage. The pre-exponential factor (A) and empirical order of decomposition (n) were determined by Friedman method. The activation energies of different mechanism models were calculated from Coats-Redfern method. Compared with the activation energy values obtained from the OFW method, the actual reaction followed a random nucleation mechanism with the integral form g(a) 5 2ln(1 2 a).

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Synthesis and properties of a high‐molecular‐weight poly(amic acid) and polyimide based on 2,2‐bis(3‐amino‐4‐hydroxyphenyl)hexafluoropropane

Cited by 17 publications

References 19 publications

Synthesis and thermal properties of polyimides containing azomethine linkage for processable high-performance engineering plastics

Synthesis and thermal properties of polyimides containing azomethine linkage for processable high-performance engineering plastics

Synthesis, characterization of pyridine-based polyimides and their use as glucose oxidase immobilization media

The pyrolysis behaviors of ternary copolyimide derived from aromatic dianhydride and aromatic diisocyanates

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