Optical anisotropy of flexible polyimide thin films

	Optical anisotropy of flexible polyimide thin films
其他题名	论文其他题名
	Li B. Z.; He T. B.; Ding M. X.; Zhang P.; Gao F. B.; Jing F.
	1998
发表期刊	Journal of Materials Research
ISSN	0884-2914
卷号	13 期号:5 页码:1368-1372
摘要	Optical anisotropy of thin films of an organo-soluble flexible polyimide based on 1,4-bis(3,4-dicarboxyphenoxy) benzene dianhydride (HQDPA) and 2,2-dimethyl-4,4'-methylene dianiline (DMMDA) was detected by a prism-coupler technique. A mechanism is proposed, based on the model of gel film collapse. The degrees of optical anisotropy of the thin films were evaluated via the level of negative birefringence. The residual solvent in the films lessens the levels of negative birefringence so that the residual solvent must be evacuated. The levels of negative birefringence are independent on the solid content of the initial solution, but dependent on the thickness of the films. For a film of 16 mu m thick, zero birefringence was achieved, postulated from the dependence of negative birefringence on the thickness of thin films. The relationship between the optical anisotropy and solution properties shows that the degrees of optical anisotropy of thin films on the same scale of thickness depend on macromolecular sizes in their dilute solutions.
收录类别	SCI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/25949
专题	中科院长春光机所知识产出
推荐引用方式 GB/T 7714	Li B. Z.,He T. B.,Ding M. X.,et al. Optical anisotropy of flexible polyimide thin films[J]. Journal of Materials Research,1998,13(5):1368-1372.
APA	Li B. Z.,He T. B.,Ding M. X.,Zhang P.,Gao F. B.,&Jing F..(1998).Optical anisotropy of flexible polyimide thin films.Journal of Materials Research,13(5),1368-1372.
MLA	Li B. Z.,et al."Optical anisotropy of flexible polyimide thin films".Journal of Materials Research 13.5(1998):1368-1372.

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