Hostname: page-component-78c5997874-s2hrs Total loading time: 0 Render date: 2024-11-18T12:17:00.098Z Has data issue: false hasContentIssue false
  • English
  • Français

Evolution of Property and Microstructure of P(VDF-TrFE) Copolymers Modified by Irradiation Introduced Defects

Published online by Cambridge University Press:  11 February 2011

Z.-Y. Cheng ,
Zhimin Li ,
Yanyun Ma ,
Q. M. Zhang  and
Fred B. Bateman
Z.-Y. Cheng*
Affiliation:
Materials Research and Education Center, Auburn University, Auburn, AL 36849
Zhimin Li
Affiliation:
Materials Research and Education Center, Auburn University, Auburn, AL 36849
Yanyun Ma
Affiliation:
The Pennsylvania State University, Materials Research Institute, University Park, PA 16802
Q. M. Zhang
Affiliation:
The Pennsylvania State University, Materials Research Institute, University Park, PA 16802
Fred B. Bateman
Affiliation:
Radiation Interactions and Dosimetry, NIST, Gaithersburg, MD 20899, U.S.A
*
chengzh@eng.auburn.edu
Get access

Abstract

The effect of defects introduced by high-energy electron irradiation on microstructure and properties in poly(vinylidene fluoride- trifluoroethylene) [P(VDF-TrFE)] is reported. In studies of the copolymers, it is found that as defect concentration increases, the material can be changed from a normal ferroelectrics to a relaxor ferroelectrics (RFE) and then to a simple relaxor. Correspondingly, the crystalline morphology changes from a coexistence of polar and non-polar phases to a macroscopically uniform non- polar phase, as revealed by x -ray data. It was observed that the dielectric property in the copolymers with a different amount of defects was well described by the Vogel-Fulcher (V-F) relationship. Based on the experimental data, a critical size, which is the smallest size of crystal with ferroelectric phase, of about 5 nm was obtained for the copolymer. The RFE developed here exhibits a massive electrostrictive strain which is very attractive for many actuator and transducer applications and a high dielectric constant which is attractive for development of high- density energy storage capacitors and electronic packaging.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 734: Symposia A/B – Defect-Mediated Phenomena in Ordered Polymers – Polymer/Metal Interfaces and Defect Mediated Phenomena in Ordered Polymers , 2002 , A2.5
Copyright
Copyright © Materials Research Society 2003

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. Charlesby, A. Radiat. Phys. Chem. 37, 5 (1991).Google Scholar
2. Lovinger, A. In Radiation Effects on Polymers, Clough, R. L.; Shalaby, S. W., Eds.; ACS Symposium Series 475, ACS, Washington, DC 1991; Chapter 6.Google Scholar
3. Lovinger, A. Macromolecules 18, 910 (1985).CrossRefGoogle Scholar
4. Pirc, R. and Blinc, R., Phys. Rev. B60, 13470 (1999).CrossRefGoogle Scholar
5. Glazounov, A. E. and Tagantsev, A. K., Appl. Phys. Lett. 73, 856 (1998).CrossRefGoogle Scholar
6. Cheng, Z.-Y.; Bharti, V.; Xu, T.B.; Xu, H.S.; Mai, T.; Zhang, Q. M. Sensors and Actuators A-Phys., 90, 138 (2001).CrossRefGoogle Scholar
7. Cross, L. E., Ferroelectrics 151, 305 (1994).CrossRefGoogle Scholar
8. Bharti, V. and Zhang, Q. M., Phys. Rev. B63, 184103 (2001).CrossRefGoogle Scholar
9. Westphal, V., Kleemann, W., and Glinchuk, M. D., Phys. Rev. Lett. 68, 847 (1992).CrossRefGoogle Scholar
10. Giegerich, U., Wust, J., Jungnickel, B.-J., IEEE Trans. Diel. & Elec. Insulat. 7, 353 (2000).CrossRefGoogle Scholar
11. Furukawa, T., Phase Transitions 18, 143 (1989).CrossRefGoogle Scholar
12. Hasegawa, R.; Takahashi, Y.; Chatani, Y.; Tadokoro, H. Polym. J. 3, 600 (1972);CrossRefGoogle Scholar
Toshiro, K. Chapter 2 In Ferroelectric Polymers; Nalwa, H. S., Eds.; Marcel Dekker, Inc. NY 1995.Google Scholar
13. Tashiro, K.; Kobayashi, M. Phase Transitions 18, 213 (1989).CrossRefGoogle Scholar
14. Bharti, V., Xu, H., Shanthi, G., Zhang, Q. M., and Liang, K., J. Appl. Phys. 87, 452(2000).CrossRefGoogle Scholar
15. Warren, B. E., X-Ray Diffraction (Dover Publications, New York, 1990).Google Scholar