Abstract
Two polyimides having the same backbone chemical structure and different pendant side groups at the 2- and 2′-positions of the diamine, the six methylene units capped with 4-cyanobiphenyl end groups and trifluoromethyl, were synthesized (6FDA-6CBO and 6FDA-PFMB). Surface-enhanced Raman scattering and surface optical second harmonic generation measurements show that after rubbing the major change in 6FDA-PFMB surface appears in the orientation of the dianhydride, which was originally planar, but becomes tilted with respect to the surface plane. In the case of 6FDA-6CBO, rubbing also causes the originally planar 4-cyanobiphenyls to tilt away from the surface and assume an azimuthally anisotropic distribution.
| Original language | English |
|---|---|
| Pages (from-to) | 619-623 |
| Number of pages | 5 |
| Journal | Macromolecular Rapid Communications |
| Volume | 19 |
| Issue number | 12 |
| DOIs | |
| Publication status | Published - 1998 Dec |
| Externally published | Yes |
ASJC Scopus subject areas
- Organic Chemistry
- Polymers and Plastics
- Materials Chemistry
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Ge, J. J., Xue, G., Li, F., McCreight, K. W., Wang, S. Y., Harris, F. W., Cheng, S. Z. D., Zhuang, X., Hong, S. C., & Shen, Y. R. (1998). Surface studies of polyimide thin films via surface-enhanced Raman scattering and second harmonic generation. Macromolecular Rapid Communications, 19(12), 619-623. https://doi.org/10.1002/(sici)1521-3927(19981201)19:12<619::aid-marc619>3.3.co;2-q