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Structure And Properties Of Binary Rodlike/Flexible Polyimide mixtures.

Published online by Cambridge University Press:  15 February 2011

S. Rojstaczer ,
M. Ree ,
D Y. Yoon  and
W. Volksen
S. Rojstaczer
Affiliation:
IBM Almaden Research Center, 650 Harry Road, San Jose, California 95120
M. Ree
Affiliation:
IBM Almaden Research Center, 650 Harry Road, San Jose, California 95120
D Y. Yoon
Affiliation:
IBM Almaden Research Center, 650 Harry Road, San Jose, California 95120
W. Volksen
Affiliation:
IBM Almaden Research Center, 650 Harry Road, San Jose, California 95120
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Abbstract:

Binary mixtures of a rodlike poly(p-phenylene pyromellitimide) (PMDA-PDA) and a flexible 6F-BDAF polyimide synthesized from hexafluoroisopropylidene diphthalic anhydride and 2,2-bis(4-aminophenoxy-p-phenylene) hexafluoropropane were prepared by solution-blending of the meta-PMDA-PDA poly(amic ethyl ester) and 6F-BDAF poly(amic acid) precursors, followed by solvent evaporation and thermal imidization. The size scale of the phase separation, as measured by light scattering, is ca. I μm or smaller in most cases. Dynamical mechanical thermal analysis measurements indicate that the glass transition temperature of 6F-BDAF is unaffected in all of the mixtures studied, indicating complete demixing of rodlike and flexible polyimides in agreement with theory. X-ray photoelectron spectroscopy results show a strong surface segregation of 6F-BDAF in mixtures containing as low as 10% by weight of the 6F-BDAF component in the bulk. The mixtures with PMDA-PDA as the major matrix component therefore maintain excellent bulk properties of rodlike polymers, i.e., high modulus to 500°C, and low coefficients of thermal expansion (< ca. 10 ppm/°C). On the other hand, the surface properties of the mixtures are dominated by the flexible 6F-BDAF, resulting in excellent polymer/polymer self-adhesion (lamination) properties between fully imidized films.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 227: Symposium J – Materials Science of High Temperature Polymers for Microelectronics , 1991 , 371
Copyright
Copyright © Materials Research Society 1991

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References

REFERENCES

1. Mittal, K.L., Ed., Polyimides (Plenum Press, New York, 1984).CrossRefGoogle Scholar
2. Lupinski, J.H. and Moore, R.S., Eds., Polymeric Materials for Electronic Packaging and Interconnection. ACS Symposium Series 407, 1989.CrossRefGoogle Scholar
3. Brown., H.R. Yang, A.C. M., Russell, T.P., Volksen, W. and Kramer, E.J., Polymer 29, 1807 (1988).CrossRefGoogle Scholar
4. Flory, P.J., Macromolecules 11, 1138 (1978).CrossRefGoogle Scholar
5. Yokota, R., Horiuchi, R., Kochi, M., Soma, H. and Mita, I., .J. Polym. Sci.: Part C 26, 215 (1988).Google Scholar
6. Ree, M., Yoon, D.Y. and Volksen, W., ACS Polym. Mat. Sci. Eng. 60, 179 (1989).Google Scholar
7. Feger, C., see page 114 in ref. 2.Google Scholar
8. Ree, M., Swanson, S.A., Volksen, W., and Yoon, D.Y., U.S. Patent 4,954,578, Sept. 4, 1990.Google Scholar
9. Rojstaczer, S., Yoon, D.Y., Volkscn, W. and Smith, B.A., Mater. Res. Soc. Proc. 171, 171 (1990).CrossRefGoogle Scholar
10. Ree, M., Yoon, D.Y. and Volkscn, W., ACS Polym. Prep. 31(1), 613 (1990).Google Scholar
11. Rojstaczer, S., Rec, M, Yoon, D.Y., and Volksen, W., J. Polym. Sci., Polym Phys. Ed., in press.Google Scholar
12. Takahashi, N., Yoon, D.Y. and Parrish, W., Macromolecules 17, 2583 (1984).CrossRefGoogle Scholar
13. Russell, T.P., Gugger, H. and Swalen, J.D., J. Polym. Sci. Polym. Phys. Ed. 21, 1745 (1983).CrossRefGoogle Scholar