SYNTHESIS AND CHARACTERIZATION OF NEW AROMATIC SULFONE ETHER POLYAMIDES CONTAINING PENDANT PENTADECYL GROUPS

A series of new polyamides and copolyamides containing aromatic sulfon e ether linkages was synthesized from -bis(4,1-phenyleneoxy-3-pentadec yl)]bisphenylamine (SPPBA) and isophthaloyl chloride (IPC), terephthal oyl chloride (TPC), bis(4-chlorocarbonylphenyl)dimethylsilane (DMSC) a nd bis(4-chlorocarbonylphenyl)diphenylsilane (DPSC) by a low-temperatu re interfacial polymerization technique. SPPBA was prepared from 4,4'- dichlorodiphenyl sulfone and 4-amino-3-pentadecyl phenol derived from cashew-nut shell liquid and was characterized by spectral methods and elemental analysis, whereas the polyamides were characterized by solut ion viscosity, IR spectroscopy, thermogravimetric analysis, X-ray diff raction and solubility. These polyamides showed enhanced solubility in organic solvents and no weight loss below 405-degrees-C in nitrogen. The effect of pendant pentadecyl substituents and silicon in the main chain of polyamides on the properties of these polymers was studied by comparing their properties with those of unsubstituted polyamides pre pared from 4'-[sulfonyl-bis(4,1-phenyleneoxy)]bisphenylamine.