期刊
POLYMER
卷 47, 期 8, 页码 2822-2829出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.polymer.2006.02.056
关键词
polymer curing; spectroscopic ellipsometry; real-time monitoring
The curing of 2,6-bis(3-aminophenoxy)benzonitrile/4,4'oxidiphthalic anhydride ((beta-CN) APB/ODPA) has been investigated using spectroscopic ellipsometry on films with various degrees of imidization. Results indicate that much of the film imidization is accomplished at 200 degrees C and above. Three absorption peaks have been observed (4 1, 5, and 6 eV) which correspond to intra- and inter-molecular optical transitions. A comparison of the film optical constants for the pristine poly(amic acid) and the fully cured polyimide shows film densification upon imidization. A curing timeline has been obtained using in situ real-time spectroscopic ellipsometry. and ellipsometry is shown to serve as a general technique for studying organic film curing. (c) 2006 Elsevier Ltd. All rights reserved.
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