Hostname: page-component-586b7cd67f-t7czq Total loading time: 0 Render date: 2024-11-28T05:14:57.273Z Has data issue: false hasContentIssue false
  • English
  • Français

Anomalous Behavior of Polystyrene Blends Using Thermally Induced Surface Wrinkling

Published online by Cambridge University Press:  14 March 2011

Jessica M. Torres  and
Bryan D. Vogt
Jessica M. Torres
Affiliation:
Department of Chemical Engineering, Arizona State University, Tempe, AZ 85284
Bryan D. Vogt
Affiliation:
Department of Chemical Engineering, Arizona State University, Tempe, AZ 85284
Get access

Abstract

The wrinkling of a 50:50 blend of a high molecular mass (Mn = 990 kg/mol) and low molecular mass (Mn = 1.3 kg/mol) polystyrene (PS) film is studied as a function of annealing temperature and film thickness. Both thermal and mechanical wrinkling are utilized to elucidate the apparent modulus of these PS blend films. The PS blend shows a modulus comparable to the high molecular weight PS, ≈ 3.2 GPa for mechanical wrinkling at ambient and thermal wrinkling for T ≤ 50 °C. A sharp decrease in the apparent modulus of the film occurs when thermal wrinkling occurs at 60 °C or higher. The calculated modulus in this case is 0.5 GPa, which is significantly below the modulus determined the neat PS for either Mn when thermally wrinkled at T > 60 °C. This behavior is attributed to a combination of surface segregation of the low molecular weight PS as well as the large difference in bulk glass transition temperature (Tg) of each component. During thermal wrinkling, the high Mn PS vitrifies first, while the surface containing primarily low Mn PS is rubbery; this leads to only the underlayer of PS wrinkling initially and selection of a shorter wavelength due to the effective thickness. The increased thermally induced stresses during cooling when the low Mn PS is vitrified do not change the selected wavelength and instead only leads to an increase in the wrinkle amplitude. These results illustrate a potential method to modulate the wrinkle wavelength without changing the overlayer, which could be useful for patterning applications.

Keywords

polymernanoscaleelastic properties
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1301: Symposium V/NN/OO/PP – Soft Matter, Biological Materials and Biomedical Materials—Synthesis, Characterization and Applications , 2011 , mrsf10-1301-v03-01
Copyright
Copyright © Materials Research Society 2011

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1. Macaubas, P. H. P., Demarquette, N. R., Polymer 42, 2543–2554 (2001).Google Scholar
2. Xie, Z. M., Sheng, J., Wan, Z. M., J. Macromol. Sci., Phys. 40, 251–261 (2001).Google Scholar
3. Wang, H., Composto, R.J., J. Chem. Phys. 113, 10386–10397 (2000)Google Scholar
4. Yu, G., Gao, J., Hummelen, J.C., Wudl, F., Heeger, A.J., Science 270, 1789–1791 (1995).Google Scholar
5. Stafford, C. M., Harrison, C., Beers, K. L., Karim, A., Amis, E. J., Vanlandingham, M. R., Kim, H. C., Volksen, W., Miller, R. D., Simonyi, E. E., Nat. Mater. 3, 545–550 (2004).Google Scholar
6. Torres, J. M., Stafford, C.M., Vogt, B.D., Polymer 51, 4211–4217 (2010).Google Scholar
7. Ding, Y.F., Kisliuk, A., Sokolov, A.P., Macromolecules 37, 161–166 (2004).Google Scholar
8. Stafford, C. M., Guo, S., Harrison, C., Chiang, M. Y. M., Rev. of Sci. Instrum. 76, 062207 (2005).Google Scholar
9. Jalbert, C., Koberstein, J.T., Yilgo, I., Gallagher, P., Krukonis, V., Macromolecules 26, 3039–3074 (1993).Google Scholar
10. Dion, M., Larson, A.B., Vogt, B.D., J. Polym. Sci B 48, 2366–2370 (2010).Google Scholar
11. Huang, R., Stafford, C. M., Vogt, B. D., J. Aerosp. Eng. 20, 38–44 (2007).Google Scholar
12. Stafford, C. M., Vogt, B. D., Harrison, C., Julthongpiput, D., Huang, R., Macromolecules 39, 5095–5099 (2006).Google Scholar
13. Minnikanti, V. S., Qian, Z., Archer, L. A., J. Chem. Phys. 126, 144905–144907 (2007).Google Scholar
14. Qian, Z., Minnikanti, V. S., Sauer, B. B., Dee, G. T., Kampert, W. G., Archer, L. A., J. Polym. Sci., Part B: Polym. Phys. 47, 1666–1685 (2009).Google Scholar