(J. Appl. Polym. Sci.: Regular Article; Supporting Information)
Young Chul An and Gen-ichi KONISHI*
Department of Organic & Polymeric Materials, Tokyo Institute of Technology, 2-12-1-H-134, O-okayama, Meguro-ku, Tokyo 152-8552, Japan
* To whom correspondence should be addressed (Tel: +81-3-5734-2321, FAX: +81-3-5734 2888, E-mail: [email protected]
spectra of the copolymers, characteristic absorption peaks originating polystyrene (spectrum (a)) aromatic C-H stretching vibrations are observed at 3089, 3059, and 3025 cm -1 . Aliphatic C-H stretching bonds are observed at 2920 and 2849 cm -1 . In spectrum (b),the peaks at 754 and 710 cm -1 indicate the presence of mono-substituted phenyl groups. In spectrum (c), the bands related to the C-H vibration of thiophene moieties are observed at 695 and 540 cm -1 (C-S-C stretching). In particular, in the thiophene functionalized polystyrene series, a new absorption band is observed at 1262 cm -1 ; this peak can be attributed to thiophene ring moieties. These results strongly support the presence of thiophene units.
Figure Caption in Supporting Information Figure S1
. FT-IR spectra of polymers such as (a) polystyrene, (b)copolystyrene (5:5) and (c) thiophene-containing polystyrene (5-5).