http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Shixiang Xie (검색결과 1 건)
- 무료
- 기관 내 무료
- 유료
-
Synthesis and Properties of Polyimide-Based Optical Materials
Shixiang Xie,Wei Wei,Zhijiang Zhang 한국물리학회 2007 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.51 No.II
Three types of polyimides (PIs) with different structures and fluorine contents were prepared via a simple two-step method. The PI precursors, poly(amid acid)s (PAAs), were first synthesized from ring-opening polyaddition, then, the PAA films were subjected to thermal imidization. The chemical and the optical properties of the polyimides were investigated and compared. The result showed that all of the polyimides had good thermal stability. The refractive index of the fluorinated polyimide was lower than that of the common polyimide and could be controlled by adjusting the fluorine content in the structure. The second-order nonlinear optical (NLO) coefficient (d$_{33}$) for the PMDA/ODA polyimide (PMDA = pyromellitic dianhydride and ODA = 4,4'-diamino diphenyl ether) was 10.69 $\times$ 10$^{-9}$ esu at 1064 nm and could be increased to 24.55 $\times$ 10$^{-9}$ esu by doping with a small amount of perylene dianhydride. The optical loss for the PMDA/ODA film and for the 6FDA/ODA film were 0.326 dB/cm and 0.102 dB/cm respectively at 650 nm. Due to many attractive properties mentioned above, polyimide-based materials are expected to have potential applications in the field of organic optical waveguides.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
