Polyamides containing s-triazine rings and fluorene “cardo”groups: synthesis and characterization

• Published in: European polymer journal Vol. 37; no. 7; pp. 1493 - 1498
• Main Authors: Sagar, A.D, Shingte, R.D, Wadgaonkar, P.P, Salunkhe, M.M
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 01-07-2001; Elsevier
• Subjects: Applied sciences; Exact sciences and technology; Fluorene cardo group; Organic polymers; Physicochemistry of polymers; Polyamide; Polycondensation; Preparation, kinetics, thermodynamics, mechanism and catalysts; s-triazine ring; Thermal stability; Polyamide; Fluorene cardo group; s-triazine ring; Thermal stability; Preparation; Aromatic polymer; Interfacial polymerization; Soluble compound; Head to head polymer; Triazine derivative polymer; Experimental study; Etheramide polymer; Fluorene derivatives; Cardo polymer
• DOI: 10.1016/S0014-3057(00)00194-4
• EISSN: 1873-1945
• ISSN: 0014-3057

Two new polyamides containing
s-triazine rings and fluorene “cardo” groups were synthesized by low temperature interfacial polycondensation of two
s-triazine ring containing diacyl chlorides viz. 2,4-bis(4-chlorocarbonylphenoxy)-6-methoxy-
s-triazine and 2,4-bis(3-chlorocarbonylphenoxy)-6-methoxy-
s-triazine with a cardo diamine viz. 9,9-bis(4-aminophenyl) fluorene. The resulting polyamides were characterized by elemental analysis, viscosity measurements, X-ray diffraction studies, thermogravimetry and IR,
1
H- and
13
C-NMR spectroscopy. The polyamides PA-1 and PA-2 had inherent viscosity values 0.52 and 0.60 dl/g respectively in
N,
N-dimethylacetamide (DMAc) at 30°C. Both the polyamides were found to be readily soluble at room temperature in polar solvents such as dimethylsulfoxide, DMAc,
N,
N-dimethylformamide,
N-methyl-2-pyrrolidone and
m-cresol. Transparent, tough and flexible films of polyamides could be cast from DMAc solution. Thermogravimetric analysis of the polyamides indicated no weight loss below 360°C under nitrogen atmosphere.