R.J. Gambino, N.R. Stemple, et al.
Journal of Physics and Chemistry of Solids
The extent of imidization was determined as a function of depth in films of the deuterated version of a model polyimide precursor, polyamic ethyl ester (d-PAE), using a novel ion beam analysis technique. Monitoring the loss of the deuterated ethyl moiety provided a precise means of evaluating the extent of imidization f as a function of the temperature of imidization and time at the imidization temperature. The imidization reaction was found to proceed uniformly as a function of depth down to 700 nm below the surface. The imidization kinetics followed a two-stage sequence in which the initial rate of imidization was rapid, up to f values of ca. 0.6, whereupon the reaction rate diminished sharply. © 1990.
R.J. Gambino, N.R. Stemple, et al.
Journal of Physics and Chemistry of Solids
David B. Mitzi
Journal of Materials Chemistry
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INFORMS 2021
O.F. Schirmer, W. Berlinger, et al.
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