Atanu Ray

Processable Heat-Resistant Polymers. IX. Synthesis and Properties of Polyamideimide from N-(p-Carboxy Phenyl) Trimellitimide and p,p′-Di-(amino Phenyl) Sulfone

Abstract A novel polyamideimide was synthesized by reacting p,p′-di-(amino phenyl) sulfone and N-(p-carboxy phenyl) trimellitimide or its diacid chloride derivative. The polymer was found to be soluble in highly polar solvents. The polymer was characterized by elemental analyses and IR spectrum. It is found to be amorphous and of low molecular weight. The polymer is fairly thermostable, having a T of 210–220°C. Thermogravimetric determination revealed that the polymer underwent 17% weight loss at 375°C in air. The dielectric constant of the polymer at 1 kHz was 3.74 at 30°C. The electrical conductivity of the polymer was also measured.

Processable Heat-Resistant Polymers. XV. Synthesis and Properties of Polyamideimides from N-(p-carboxy Phenyl) Trimellitimide and p, p′-Di(amino Phenyl) Methane

Abstract Polyamideimides (PAI) were prepared by the polycondensation reaction of the diacid chloride of N-(p-carboxy phenyl) trimellitimide and p, p′-di(amino phenyl) methane following three different techniques. The solution, thermal, chemical, and electrical properties of the polymer were studied. The polymer was found to be soluble in highly polar solvents. The solubility parameter of the polymer calculated from Smalls group contributions agreed well with the experimental value. The polymer was found to be fairly thermostable and only 10% weight loss occurred at 360°C. X-ray diffraction study revealed that the polymer is amorphous. The electrical properties of the polymer at room temperature were also studied.

Processable Heat-Resistant Polymers. XII. Polyamideimides from N-(p-Carboxy Phenyl) Trimellitimide

Abstract Polyamideimides were prepared by reacting the diacidchloride of N-(p-carboxy phenyl) trimellitimide and ethylene diamine or hexamethylene diamine at 30–70°C. The polymers were characterized by nitrogen analyses and IR spectra. The solution, thermal, electrical, and a few other properties of the polymers were studied. The polymers were found to be soluble in highly polar solvents. The solubility parameter was calculated from Smalls group contribution which agrees well with the experimental value. X-ray diffraction data indicated that the polymers are crystalline. Tg of the polymers calculated from DTA curves was found to be above 225°C. Dielectric behavior of the polymers was also studied at room temperature (∼30°C).

Processable heat-resistant polymers: 14. Polyamides and polyamideimides containing azo linkages

Abstract Diamines containing azo groups were synthesized by reacting sulphanilamide or p,p′-di(aminophenyl) sulphone with aniline. These diamines were used for the synthesis of polyamides and polyamideimides by interfacial and solution polycondensation techniques. The polymers were characterized by elemental (N and S) analyses and by i.r. and u.v. spectroscopy. The physical, chemical, thermal and electrical properties of the polymers were studied. The polymers were found to be soluble in highly polar solvents. The thermal stability of polyamideimides is superior to that of polyamides. X-ray diffraction and electrical behaviour of the polymers were also reported.

Structure Property Relationship in Unsaturated Polyamides

Abstract Unsaturated polyamides from fumaric acid and ortho-, meta- and para-phenylene diamine were prepared by thionyl chloride activated low temperature polycondensation in polar solvents. The polymers were found to be soluble in highly polar solvents. The solubility parameter of the polymers was calculated from Smalls group contribution, which agreed well with the experimental values. X-ray diffraction study revealed that the polymers were amorphous. The isomeric effect on the thermal and electrical properties of polymers was discussed.

Processable heat resistant polymers. XVI: Polyamideimidesulphonamides

Abstract Polyamideimides having sulphonamide linkages were prepared by low temperature polycondensation of 2-sulphoxy-1,3-dioxoisoindoline-5-carboxylic acid with various diamines in the presence of thionyl chloride. The polymers were soluble in highly polar solvents. The solubility parameters of the polymers were calculated from Smalls group contributions. Isothermogravimetric data indicated that the polymers were fairly thermostable.