標題: Structural effect on stretch-induced birefringence in polyimide films
作者: King, Jinn-Shing
Lee, Wen-Chin
Chang, Li-Ming
Whang, Wha-Tzong
材料科學與工程學系
Department of Materials Science and Engineering
關鍵字: intrinsic birefringence;polarizability;film;stretch;polyimide
公開日期: 1-Oct-2007
摘要: Seven polyimides (Pls) of low glass transition temperature were synthesized and their films were uniaxially stretched to observe the variation in their in-plane birefringence (An). The intrinsic birefringences (triangle n degrees) of their polymer chains were also estimated using the experimental average refractive indices and computationally calculated polarizability tensors. The observed stretch-induced An was markedly affected by the PI structure. A model that shows a good fit to experimental data is proposed to predict the orientation degree of PI chains in different PI films. The model, when combined with the analysis of the estimated An's, is useful in explaining the behavior of stretch-induced triangle ns in PI films.
URI: http://dx.doi.org/10.1143/JJAP.46.6801
http://hdl.handle.net/11536/10260
ISSN: 0021-4922
DOI: 10.1143/JJAP.46.6801
期刊: JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS
Volume: 46
Issue: 10A
起始頁: 6801
結束頁: 6806
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