Polyamides 7a and 7b were prepared from α-(4-aminophenyl)-ω-aminopoly(thio-1,4-phenylene)s (3a) by reaction with 1,12-dodecanedioic acid (6) , tribloc copolymers 9 from 3a and 11 aminoundecanoic acid (8) , and multibloc copolymers 10 from 3a, 6 , and 8 . The properties of ...