Synthesis and characterization of phosphorus containing aromatic poly(amide-imide)s copolymers for high temperature applications

Agrawal, Sanjay; Narula, Anudeep Kumar

doi:10.1007/s00289-013-1021-1

Cited by 13 publications

(3 citation statements)

References 31 publications

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“…Tris (3-aminophenyl) phosphine oxide (TAPO) and all diimide-diacids are synthesized in our laboratory in the previous study. 36 ortho to P=O or para to imide group), 122.6 (aromatic C ortho to P=O or para to -NH 2 ), 121.1 (aromatic C ortho to imide group or para to P=O), 119.8 (aromatic C ortho to -NH 2 or para to P=O), 117.3 (aromatic C ortho to -NH 2 or P=O), 15.9 (C of -CH 2 -).…”

Section: Methodsmentioning

confidence: 99%

Facile synthesis of new thermally stable and organosoluble polyamide-imides based on non-coplaner phosphorus and silicon containing amines

Agrawal

Narula

2014

J Chem Sci

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Two new kinds of diamines, 3-[bis-(3-aminophenyl)-phosphinoyl)-phenyl]-3-(triphenylphosphoranylidene)-pyrrolidene-2,5-dione, (DAP) with phosphorus moiety and bis-(5-amino-naphthalene-1yl) dimethyl silane (DAS) with silicon moiety are synthesized. A series of novel aromatic polyamide-imides (PAIs) are prepared from three dicarboxylic acids and synthesized diamines. The phosphorus and silicon containing diamines and all polymers are characterized by FT-IR, NMR spectroscopic techniques and elemental analysis. The polymers obtained have good thermal stability and glass transition temperature (T g) in the range of 254-315 • C. All these novel polyamide-imides (PAIs) contain 10% weight loss at the temperature above 506 • C and more than 59% residue at 600 • C in nitrogen atmosphere. The resulting polymeric films exhibit high optical transparency and inherent viscosity in the range of 0.68 to 0.79 dL/g. These polymers are found to be soluble in aprotic polar solvents such as NMP, DMSO, DMF and DMAc. Wide angle X-ray diffraction revealed that these polymers are predominantly amorphous in nature.

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Section: Methodsmentioning

confidence: 99%

Facile synthesis of new thermally stable and organosoluble polyamide-imides based on non-coplaner phosphorus and silicon containing amines

Agrawal

Narula

2014

J Chem Sci

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“…A potential NLO polymer must contain highly polarizable conjugated electronic systems constituted by electron donor and acceptor moieties, and has to be mechanically very strong and thermally stable with a high glass-transition temperature (T g ). In the synthesis of NLO polymers for electro-optic device applications, stabilization of electrically induced dipole alignment is one of important considerations, and several approaches to minimize the randomization have been proposed, such as the use of cross-linked systems [13][14][15][16][17][18][19][20][21], the utilization of polymers with high T g polyimides [22][23][24][25][26][27][28][29], and H-shape polymers [30]. Various polyesters with NLO chromophores in the main chain [31,32] or side chain [33,34] have been prepared and their NLO properties studied.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and electro-optic properties of novel X-type polyester containing dioxynitrobenzylidenecyanoacetate with highly enhanced thermal stability of dipole alignment

Choe

Lee

2015

Polym. Bull.

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Novel X-type polyester 5 containing 5-nitro-2,4-dioxybenzylidenecyanoacetate groups as nonlinear optical (NLO) chromophores, which constitute parts of the polymer backbone, was prepared and characterized. Polyester 5 is soluble in common organic solvents such as N,N-dimethylformamide and acetone. Polymer 5 shows a thermal stability up to 280°C from thermogravimetric analysis with glass-transition temperature obtained from differential scanning calorimetry of near 116°C. The second harmonic generation (SHG) coefficient (d 33 ) of poled polymer film at the 1064 nm fundamental wavelength is 1.78 pm V -1 . The dipole alignment exhibits a thermal stability even at 4°C higher than glass-transition temperature (T g ), and no significant SHG decay is observed below 120°C due to the partial main-chain character of polymer structure, which is acceptable for NLO device applications.

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“…Therefore, there have been many efforts to improve the solubility in organic solvents of para-aramids by designing their molecular structures. [20,21] Studies have reported that the solubility of aromatic polyamides can be increased by introducing halogen groups or cyano groups into the phenylene ring. [22][23][24] In addition, the introduction of meta aryl or ether group as a flexible linkage to aromatic polymer backbones can improve the solubility and processability.…”

Section: Introductionmentioning

confidence: 99%

Structural, Optical and Thermal Characterization of Wholly Aromatic Poly(ether amide)s Synthesized by Phosphorylation‐Based Condensation Polymerization

et al. 2020

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[1]To attain high performance polyamides with good thermal properties and enhanced processability, in this study, a series of wholly aromatic poly(ether amides) (PEAs) with different meta‐ and para‐phenylene linkage ratios was synthesized by phosphorylation‐based polycondensation reaction of terephthalic acid (TPA) and/or isophthalic acid (IPA) with 3,4′‐oxydianiline (ODA) in NMP/CaCl2 solvent system. The synthesized PEA homopolymers and copolymers exhibited good solubility in organic polar solvents, such as NMP, DMAc and DMSO. The intrinsic viscosity of the synthesized PEAs in NMP solvent was measured to be in the range of 0.48‐0.97 dl/g. The 1H NMR analyses confirmed that the output compositions of PEA copolymers were quite consistent with the feed compositions. The photographic digital images and UV‐visible spectra showed that solution‐casted PEA films were optically light brown and transparent owing to their amorphous and nonlinear chain structures. The DSC data revealed that the glass transition temperatures of PEAs are in the range of 242–310 °C, depending on the relative contents of meta‐ and para‐phenylene linkages. All PEA films were characterized to be thermally stable up to ∼400 °C and to have high char residues above 63 % at 800 °C in nitrogen atmosphere.

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Synthesis and characterization of phosphorus containing aromatic poly(amide-imide)s copolymers for high temperature applications

Cited by 13 publications

References 31 publications

Facile synthesis of new thermally stable and organosoluble polyamide-imides based on non-coplaner phosphorus and silicon containing amines

Facile synthesis of new thermally stable and organosoluble polyamide-imides based on non-coplaner phosphorus and silicon containing amines

Synthesis and electro-optic properties of novel X-type polyester containing dioxynitrobenzylidenecyanoacetate with highly enhanced thermal stability of dipole alignment

Structural, Optical and Thermal Characterization of Wholly Aromatic Poly(ether amide)s Synthesized by Phosphorylation‐Based Condensation Polymerization

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