Synthesis and characterization of new poly(azomethine ester)s having phenylthiourea units

Vasanthi, B. Joy; Ravikumar, L.

doi:10.1016/j.eurpolymj.2007.07.037

Cited by 42 publications

(20 citation statements)

References 38 publications

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“…Such investigations on structure-property relationships of polymers having phenylazomethine units were reported on polyethers [11], polyetherurethnas [12], polyether sulfides [13] and polyamides [15,16]. We have reported earlier [17][18][19][20] polyesters containing phenylazomethine, phenylazo and phenylthiourea units. Such polymers show enhanced solubility, along with good conducting and anticorrosion behaviors.…”

Section: Introductionmentioning

confidence: 97%

Synthesis and Characterization of New Polyamides with Substitutions in the Pendent Benzylidene Rings

Ravikumar¹,

Saravanan

Saravanamani

et al. 2009

Designed Monomers and Polymers

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Aromatic polyamides with azomethine groups present in the polymer with -Cl, -OCH 3 , -N(CH 3 ) 2 and -OH substitutions in the pendent benzylidene rings were synthesized through polycondensation of new aromatic dicarboxylic acids with aromatic diamines using the phosphorylation technique in DMF. Direct polymerization of the monomers benzylidenamino phenyl 2,5-dicarboxylic acid (M1), 4 -hydroxy benzylidenamino phenyl 2,5-dicarboxylic acid (M2), 4 -methoxy benzylidenamino phenyl 2,5-dicarboxylic acid (M3), 4 -chloro benzylidenamino phenyl 2,5-dicarboxylic acid (M4) and (N,N-dimethylamino) benzylidenamino phenyl 2,5-dicarboxylic acid (M5) was carried out with commercial diamines, 4,4 -methylenedianilene and 4,4-diaminobiphenyl, at 140 • C. FT-IR and 1 H-NMR spectroscopic analysis were used to characterize the monomers and polymers. The inherent viscosity values of polyamides are in the range 0.39-0.68. Due to the substitutions in the pendent benzylidene rings, the polymers show enhanced solubility. The thermal stability of the polyamides was evaluated using thermogravimetric analysis, and the thermogravimetric curves show the dependence of thermal stability on the nature of the substitutions in the benzylidene rings.

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Section: Introductionmentioning

confidence: 97%

Synthesis and Characterization of New Polyamides with Substitutions in the Pendent Benzylidene Rings

Ravikumar¹,

Saravanan

Saravanamani

et al. 2009

Designed Monomers and Polymers

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“…Poly(azomethine amide)s reported so far mainly focussed to improve the polymer solubility, thermal stability and liquid crystalline properties [4][5][6][7][8]. Inclusion of phenylthiourea groups into polymer backbone has gained great importance for its excellent properties such as corrosion resistance, thermal stability, semi conductivity and binding to metal ions [9][10][11]. Polythioamides are well known in which the amide carbonyl oxygen is replaced with sulfur [12].…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Characterization and Metal Ion Adsorption Studies on Novel Aromatic Poly(Azomethine Amide)s Containing Thiourea Groups

Ravikumar¹,

Kalaivani²,

Vidhyadevi³

et al. 2014

OJPChem

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A series of novel ladder-type poly(azomethine amide)s (PAMs) were prepared from new azomethine containing carboxylic acid monomer (TCA) with simple aromatic diamines and aromatic diamines with thiourea groups (TDAs) by means of phosphorylation polycondensation reaction. Molecular weights of the polyamides were evaluated viscometrically, and the inherent viscosities were in the range of 0.31 -0.58 g/dl. These ladder-type polymers were not freely soluble in common organic solvents. Structure of monomers and polymers were confirmed using FT-IR, 1 H-NMR and 13 C-NMR spectroscopic analysis. Removal of Cu 2+ and Cd 2+ from aqueous solutions by adsorption onto the polyamides was investigated. The effect of pH, initial metal ion concentrations and contact time were studied in batch experiments. The polyamides were found to be highly effective adsorbents for the removal of Cu 2+ and Cd 2+ metal ions from aqueous solutions. In a mixture of metal ions, the selectivity order was found to be Pb(II) > Cu(II) > Cr(IV) > Cd(II).

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“…But these synthesized polyimides showed better solubility because of the incorporation of ether linkages and methyl chloro substitutions than reported azomethine polymers. [26,27] …”

Section: Wileyonlinelibrarycom/journal/patmentioning

confidence: 98%

“…The values for Mw and Mn were found in the range of 5.72 × 10 5 g/mol-6.58 × 10 5 g/mol and 3.79 × 10 5 g/mol 4.11 × 10 5 g/mol respectively and presented in Table 3. [27] Moisture absorption studies of polyimides…”

Section: Inherent Viscositiesmentioning

confidence: 99%

Synthesis and characterization of new soluble thermally stable poly(azomethine-ether-imide)s: discerning the possibility for high temperature applications

Iqbal

Khosa

Jamal

et al. 2015

Polym. Adv. Technol.

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A new series of polyimides was synthesized by the condensation of monomers (azomethine-ether diamine, DA-1 and DA-2) with pyromelliticdianhydride (PMDA), 3,4,9,10-perylenetetracarboxylic dianhydride (PD) and 3,3′4,4′-benzophenonetetracarboxylic dianhydride (BD). The structural explications of monomers and polyimides was conducted by FT-IR, 1 H NMR and elemental analysis. All polyimides were found soluble in polar aprotic solvents and found to be semicrystalline in nature confirmed by XRD. The inherent viscosities were found in the range of 0.67-0.77 g/dl. %. Average molecular weight (M W ) and number average molecular weight (Mn) of the polyimides were found in the range of 5.72 × 10 5 g/mol-6.58 × 10 5 g/mol and 3.79 × 10 5 g/mol 4.11 × 10 5 g/mol respectively. The polyimides exhibited excellent thermal properties having a glass transition temperature T g in the range of 230-290°C and the 10% weight loss temperature was above 450°C. The values of thermodynamic parameters, activation energy, enthalpy and entropy fall in the range of 45.2-53.90 kJ/mol, 43.5-52.30 kJ/mol and 0.217 kJ/mol k to 0.261 kJ/mol k respectively.

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Synthesis and characterization of new poly(azomethine ester)s having phenylthiourea units

Cited by 42 publications

References 38 publications

Synthesis and Characterization of New Polyamides with Substitutions in the Pendent Benzylidene Rings

Synthesis and Characterization of New Polyamides with Substitutions in the Pendent Benzylidene Rings

Synthesis, Characterization and Metal Ion Adsorption Studies on Novel Aromatic Poly(Azomethine Amide)s Containing Thiourea Groups

Synthesis and characterization of new soluble thermally stable poly(azomethine-ether-imide)s: discerning the possibility for high temperature applications

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