Block copolymers of the general formula [(-CO-R′-CO-HN-Ar-NH-CO-R'-CO)xNH(CH2)3-(Me2SiO)y(CH2)3NH2]n, [n＝18.00 to 1175.0] where R′＝CH2C (CH2GeCl3);CH2CHGeCl3CH2;and Ar＝ -C6H4;-(o.CH3C6H4)2;-o.CH3OC6H4)2; -(o.CH3C6H4) were prepared by a polycondensation reaction of polyamide containing a pendant trichlorogermyl group and terminal acid chloride Cl(-CO-R′-CO.NHAr-NH-CO-R′-CO-)xCl with aminopropyl-terminated polydimethylsiloxane H2N(CH2)3(Me2SiO)y-(CH2)3NH2], (PDMS). These polymers were characterized by elemental analysis, Tg, FT-IR, 1H-NMR, solid state 13C-NMR, and molecular weight determination. The thermal stability of these copolymers was examined using thermal analysis techniques, such as TGA and DSC. Their molecular weights as determined by laser light scattering technique ranged 5.13×105 to 331×105 g/mol. These polymers display their Tg in the range of 337 to 393 ℃ with an average decomposition temperature at 582 ℃.

Keywords: synthesis; organogermanium polyamide; aminopropyl-terminated polydimethylsiloxane; block copolymer; thermal characterization