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 |
| Publication status | Published - 1998 Dec 1 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Materials Chemistry
- Polymers and Plastics
Cite this
Surface studies of polyimide thin films via surface-enhanced Raman scattering and second harmonic generation. / Ge, Jason J.; Xue, Gi; Li, Fuming; McCreight, Kevin W.; Wang, Shy Yeu; Harris, Frank W.; Cheng, Stephen Z D; Zhuang, Xiaowei; Hong, Seok Cheol; Shen, Y. R.
In: Macromolecular Rapid Communications, Vol. 19, No. 12, 01.12.1998, p. 619-623.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Surface studies of polyimide thin films via surface-enhanced Raman scattering and second harmonic generation
AU - Ge, Jason J.
AU - Xue, Gi
AU - Li, Fuming
AU - McCreight, Kevin W.
AU - Wang, Shy Yeu
AU - Harris, Frank W.
AU - Cheng, Stephen Z D
AU - Zhuang, Xiaowei
AU - Hong, Seok Cheol
AU - Shen, Y. R.
PY - 1998/12/1
Y1 - 1998/12/1
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=0032279692&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0032279692&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:0032279692
VL - 19
SP - 619
EP - 623
JO - Macromolecular Rapid Communications
JF - Macromolecular Rapid Communications
SN - 1022-1336
IS - 12
ER -