Please use this identifier to cite or link to this item:
|Title:||Polysulphide amide synthesized by activated nucleophilic displacement polymerization|
Dutta, Pradip K
|Abstract:||Polysulphide amide (PSA) is synthesized by the displacement polymerization between 4, 4'-bis (pchlorophenyl carbonyl amino) diphenyl ether and anhydrous sodium sulphide in NMP at 200°C. PSA is soluble in aprotic solvents and is characterized by elemental analysis, IR and 1H-NMR spectroscopy, and viscometry. Thermal behaviour of PSA is studied by TGA, DSC and TMA. The polymer shows good thermal stability and LOI value of about 44. X-ray analysis reveals that PSA is crystalline and has similar orthorhombic unit cell parameters to those of PPS and PEEK. The chain symmetry pattern of these three polymers is also very similar. The higher thermal stability of PSA appears to be due to higher degree of crystallinity and hydrogen bonding.|
|ISSN:||0975-0991 (Online); 0971-457X (Print)|
|Appears in Collections:||IJCT Vol.01(2) [March 1994]|
Items in NOPR are protected by copyright, with all rights reserved, unless otherwise indicated.