Semicrystalline polyimide, Regulus™ NEW-TPI, is a thermoplastic polyimide produced by Mitsui Toatsu. This aromatic polyimide possesses outstanding heat resistance, high tensile strength, excellent electrical properties, and strong solvent resistance. It has become the subject of recent study in our group [1-6] and others [7-13]. The flexible ether and meta linkages in the monomer unit lower its glass transition temperature (Tg) to 250°C in quenched amorphous material. The chemical repeat unit has been reported previously [1,13] and is shown below
P.P. Huo and P. Cebe, Polymer 34, 696 (1993).
P.P. Huo and P. Cebe, Colloid Polym. Sci. 270, 840 (1992).
J.B. Friler and P. Cebe, Polym. Eng. & Sci. 33, 587 (1993).
Y. Aihara and P. Cebe, Polym. Eng. Sci., in press (1993).
P.P. Huo, J.B. Friler and P. Cebe, Polymer 34, 4387 (1993).
S.X. Lu and P. Cebe, Polvm. Prepr., (American Chem. Soc., 1994), in press.
T.H. Hou and R.M. Reddy, SAMPE Q. 38, January (1991).
B. Hsiao, B. Sauer and A. Biswas, J. Poly Sci.: Poly. Phys., in press (1993).
Mitsui-Toatsu Chem., Inc. Tokyo, Japan. Technical Data SheetA-00.
H. Sakaitani, K. Okuyama and H. Arikawa, Poly. Prepr. Jpn. 40, 478 (1991).
S. Yuasa, M. Truji and T. Takahashi, Polym. Prepr. Jpn 40(1-4), 491 (1991).
T. Sasuga, Polymer 32, 1539 (1991).
P.M. Hergenrother, SPE Conference on High Temperature Polymers and Their Uses, (Case Western Reserve University, 1989).
P. Braunlich, Thermally Stimulated Relaxation in Solids, 1st ed. (Springer-Verlag, Berlin, 1979).
J.P. Ibar, P. Denning, T. Thomas, A. Bernes, C. de Goys, J.R. Saffell, P. Jones and C. Lacabanne, Advances in Chemistry Series No. 227, Polym. Characterization: Phys. Prop., Spectroscopic, and Chromatographic Methods, American Chemical Society 227, 167 (1990).
J.S. Chung and P. Cebe, Polymer 33, 2312 (1992).
J.S. Chung and P. Cebe, Polymer 33, 2325 (1992).
J. van Turnhout, Polym. J. 2, 173 (1971).
This research is supported by the Electric Power Research Institute, contract RP: 8007-13. The authors thank Mitsui Toatsu for film samples of Regulus™ and for support. The authors thank Prof. Lacabanne for helpful discussions about TSDC cell design.
About this article
Cite this article
Lu, S.X., Russell, W.C. & Cebe, P. Relaxation of New-Tpi Thermoplastic Polyimide Studied by Thermally Stimulated Depolarization Current. MRS Online Proceedings Library 321, 197–202 (1993). https://doi.org/10.1557/PROC-321-197