II. TITLE (include Security Casiication) "STRUCTURE, ORDER AND THE MEfTALLIC STATE IN POLYANILINE AND ITS DERIVATP " ~ 3

FIELD GROUP SUB-GROUP onentegpeIn e hydrclnde, poyoto-lxie hyd0ch040d f mfhnatedpolyaniline, magnetotransport studie*7poly acetylene 19. ABSTRACT (Continue on reverse it necessary a'-d identify by block number) The origin of high conductivity in various conducting polymers remains of considerable interest. The polyaniline family of polymers provides a means of sensitively testing the effects of crystal structure, coherence, order and chain separation on the conductivity. Extensive comparative study of emeraldine hydrochloride, oriented emeraldi ne hydrochloride, poly(orthotol uidi ne) hydrochloride, and sulfonated polyaniline dlemonstraLe the importarnCe of interchain diffusion of charge in achieving high conductivities. These results are in accord with magnetotra nsport studies of polyacetylene which similarly demonstrate the importance of three-dimensional charg