Polyaniline-dodecylbenzenesulfonate( PANI-DBSA) fibrils prepared directly during emulsion polymerization or by precipitation from solution have been studied by transmission electron microscopy. High-aspect-ratio fibrils are obtained with typical dimensions of order 1 mm by 1/~m. The small crystallites within the fibrils are oriented with c axis parallel to the fibril axis. The crystal structure of the PANI-DBSA crystallites has been determined as orthorhombic with two PANI chain repeat units and two DBSA molecules in the unit cell; the lattice parameters are a= 1.178 nm, b= 1.791 nm and c=0.716 nm. Based on this structure, the calculated density is 1.12 g cm- 3. The systematic absences in the PANI-DBSA diffraction data are consistent with those expected for the Pmnm space group.
Посилання на статтю:
Electron diffraction studies of the structure of polyanilinedod ecyl benzenesu I fonate / C. Y. Yang, P. Smith and A. J. Heeger // Polymer. – 1994. – Vol 35. – P. 1142-1147.