نوع فایل:PDF تعداد صفحات:7سال انتشار:1395چکیدهDue to biological and physicochemical properties of poly (-amino acid)s interest in synthesis of their novel derivatives was recently increased. As a new and simple approach, an aromatic poly (-amino acid), poly (AA), was prepared from poly salicylaldehyde (PSA) as a precursor which -amino acid groups formed as pendant groups on the PSA framework. PSA was prepared by a poly condensation reaction, after treatment of salicylaldehyde with chloromethylene group. Transformation of PSA to poly (AA) was done through Strecker synthesis with a cyanide salt. The final step includes hydrolysis of nitrile groups to carboxylic acid through a simple one step reaction. Poly (AA) and PSA were characterized by FTIR, 1H NMR instruments and elemental analysis. Both of PSA and poly (AA) had the melting point above 400 C. Also the number-average molecular weight (Mn) of PSA was 2190 that measured by Warly titration method where polymer was dissolved in pyridine/acetic anhydride mixture and titrated with NaOH 0.5 N as a titrant.واژگان کلیدیpoly (-amino acid), poly (-amino nitrile), poly salicylaldehyde, poly condensation reaction, Number-average molecular weight