Synthesis of Diimide-Diacid Monomers and Poly(amideimide)s: Effects of Flexible Linkages and Pendant Hexafluoroisopropylidine Unit on Processability, Thermal Stability and Electrical Properties

Thiruvasagam, P.; Venkatesan, D.

doi:10.1080/03602559.2012.680564

Cited by 13 publications

(7 citation statements)

References 19 publications

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“…Introducing heteroaromatic rings containing pyridine into the main chain of a synthetic polymer would impart certain properties such as the rigidity and polarizability to the prepared heteroaromatic polymers [19][20][21] . In addition, the incorporation of pyridine moiety into the polyimides might improve their electron affinity and electron-transporting properties [22] .…”

Section: Please Scroll Down For Articlementioning

confidence: 99%

Nanosized Silica-Reinforced Maleimido Terminal Triaryl Pyridine Core Polybenzoxazine (nSiO₂/PBZ) Nanocomposites

Gunasekaran

Rajakumar

Dharmendirakumar

2015

Polymer-Plastics Technology and Engineering

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A new series of nanosized silica-reinforced polybenzoxazine (nSiO 2 /PBZ) hybrid nanocomposites were prepared from three types of maleimido terminal benzoxazine monomers and nSiO 2 . The successive increment of nSiO 2 into the PBZ matrices exhibited lower dielectric constant, superior thermal stability and higher glass transition temperature. The hydrophobic nature due to the presence of a less polar Si-O-Si linkage in the composites reduced water uptake properties. The incorporation of nSiO 2 particles also retains their luminescence properties. The homogeneous morphology of the nanocomposites caused from the good interfacial interaction between the embedded nSiO 2 and PBZ matrix as evidenced by SEM and AFM images.

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Section: Please Scroll Down For Articlementioning

confidence: 99%

Nanosized Silica-Reinforced Maleimido Terminal Triaryl Pyridine Core Polybenzoxazine (nSiO₂/PBZ) Nanocomposites

Gunasekaran

Rajakumar

Dharmendirakumar

2015

Polymer-Plastics Technology and Engineering

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“…The nitro compound 5-(4-nitrophenoxy)naphthalene-1-amine III was prepared by nucleophilic substitution reaction. [17][18][19][20] 4-nitrofluorobenzene (II) (0.06 mol) was dissolved in 40 mL of dry NMP and 20 mL of toluene. To this, 5-amino1-naphthol (I) (0.06 mol) and K 2 CO 3 (0.12 mol) were added.…”

Section: -(4-nitrophenoxy)naphthalene-1-aminementioning

confidence: 99%

Synthesis and characterization of new unsymmetrical diamine monomer and polyimides

Thiruvasagam

2013

Designed Monomers and Polymers

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A novel unsymmetrical monomer 5-(4-aminophenoxy)naphthalene-1-amine was prepared from 5-amino1-naphthol and 4-nitrofluorobenzene by the nucleophilic substitution reaction followed by reduction using 'Sn' and HCl. The structure of the monomer was confirmed by FT-IR and 1 H-NMR. A series of aromatic polyimides were successfully prepared from this diamine and aromatic dianhydrides through high temperature solution imidization technique. The polyimides were fully characterized by viscosity measurements, solubility test, FT-IR and 1 H-NMR spectroscopy, X-ray diffraction, differential scanning calorimetry, and thermogravimetry. The X-ray diffraction patterns indicated that all these polyimides were amorphous. The polyimides exhibited good solubility in organic solvents. The glass transition temperature values were observed in the temperature range 210-287°C. Thermogravimetric analysis indicated that 10% weight loss occurred in the temperature range 385-463°C.

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“…They possess desirable characteristic for a variety of applications as they retain good mechanical properties at high temperature by comparable properties with aromatic polyamides and polyimides [33][34][35][36][37] . PAIs containing L-amino acid linkages can be a good qualification for these purposes because of their important properties such as thermo stable, mechanical strength, good chemical resistance, and high biodegradability.…”

Section: Introductionmentioning

confidence: 99%

Structural Characterization and Thermal Properties of Chiral Poly(amide-imide)/Modified MgAl Layered Double Hydroxide Nanocomposites Prepared via Solution Intercalation

Mallakpour

Dinari

2014

Polymer-Plastics Technology and Engineering

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Intercalated poly(amide-imide) (PAI)/modified layered double hydroxide (LDH) nanocomposites (NC)s were synthesized by the solution intercalation method. Modified LDH was synthesized from the co-precipitation reaction of the Al(NO 3 ) 3 Á 9H 2 O, Mg(NO 3 ) 2 Á 6H 2 O and N,N'-(pyromellitoyl)-bis-valine under ultrasound irradiation. An optically active amino acid containing PAI was synthesized by direct polymerization reaction of chiral diacid and 3,5-diamino-N-(thiazole-2-yl)benzamide under green condition. The synthesized materials were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, thermogravimetric analysis (TGA), field emission scanning electron microscope (FE-SEM) and transmission electron microscopy (TEM) techniques. TEM and FE-SEM analysis confirmed that modified LDH was dispersed within the polymer matrix in intercalated and exfoliated forms.Keywords Layered double hydroxides; Nanocomposite; Poly(amide-imide); (S)-Valine amino acid; X-ray diffraction INTRODUCTIONInorganic=polymer nanocomposites (NCs) are a class of composites in which the inorganic phase dimensions are in the order of nanometers. These NCs contain only a few percent of well-dispersed inorganic components of nanometer size in an organic polymer, and exhibit better properties than pure polymers [1][2][3][4][5][6] . The most part of previous studied has been focused on NCs based on clay and layered silicates because the starting clay materials are easily available and their intercalation chemistry has been studied for a long time [7][8][9][10][11] .

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Synthesis of Diimide-Diacid Monomers and Poly(amideimide)s: Effects of Flexible Linkages and Pendant Hexafluoroisopropylidine Unit on Processability, Thermal Stability and Electrical Properties

Cited by 13 publications

References 19 publications

Nanosized Silica-Reinforced Maleimido Terminal Triaryl Pyridine Core Polybenzoxazine (nSiO₂/PBZ) Nanocomposites

Nanosized Silica-Reinforced Maleimido Terminal Triaryl Pyridine Core Polybenzoxazine (nSiO₂/PBZ) Nanocomposites

Synthesis and characterization of new unsymmetrical diamine monomer and polyimides

Structural Characterization and Thermal Properties of Chiral Poly(amide-imide)/Modified MgAl Layered Double Hydroxide Nanocomposites Prepared via Solution Intercalation

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Synthesis of Diimide-Diacid Monomers and Poly(amideimide)s: Effects of Flexible Linkages and Pendant Hexafluoroisopropylidine Unit on Processability, Thermal Stability and Electrical Properties

Cited by 13 publications

References 19 publications

Nanosized Silica-Reinforced Maleimido Terminal Triaryl Pyridine Core Polybenzoxazine (nSiO2/PBZ) Nanocomposites

Nanosized Silica-Reinforced Maleimido Terminal Triaryl Pyridine Core Polybenzoxazine (nSiO2/PBZ) Nanocomposites

Synthesis and characterization of new unsymmetrical diamine monomer and polyimides

Structural Characterization and Thermal Properties of Chiral Poly(amide-imide)/Modified MgAl Layered Double Hydroxide Nanocomposites Prepared via Solution Intercalation

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Product

Resources

About

Nanosized Silica-Reinforced Maleimido Terminal Triaryl Pyridine Core Polybenzoxazine (nSiO₂/PBZ) Nanocomposites

Nanosized Silica-Reinforced Maleimido Terminal Triaryl Pyridine Core Polybenzoxazine (nSiO₂/PBZ) Nanocomposites