Novel conductive graft copolymers with oligoaniline side chains were synthesized by the reaction of oligoaniline with polymethacrylie chloride．Conjugated oligoanilines

tetraaniline (TA) and octaaniline (OA) were introduced into PMAA and P(MAA-co-MMA) main chains to combine the specific properties of oligoanilines and the desirable mechanical strength and film-forming properties of polymers．Four graft eopolymers were synthesized in this work：PMAA-g-TA

PMAA-g-OA

P(MAA-co-MMA)-g-TA and P(MAA-co-MMA)-g-OA

which were characterized by 1H-NMR．FTIR．elementary analysis and thermogravimetric analysis．Compared with their original polymers

the thermal stability of the sraft copolymers was improved to a certain extent．Some of these eopolymers showed electrical properties similar to polyaniline

exhibiting different states of oxidation

i．e．

fully reduced

partially oxidized and fully oxidized states．Doped copolymers grafted with tetraaniline．PMAA-g-TA and P(MAA-co-MMA)-g-TA

did not show conductivity because their effective doped aniline lengths were less than four aniline units．On the other hand

copolymers grafted with octaaniline side chains

PMAA-g-OA and P(MAA-co-MMA)-g-OA

can be doped

and the pmtonic-doped copelymers may exhibit a conductivity value up to 10-5S／cm．It suggests a new way to prepare conductive polymer materials．which are superior to conventional conductive polymer blends with unstable properties due to phase separation and have much better processibility than polyaniline．