X-ray absorption spectra/ PMDA-PDA polyimide monolayersflame-annealed polycrystalline Au filmsscanning tunnelling microscopyX-ray absorption spectroscopyMonolayers of the rod-like PMDA-PDA polyimide adsorbed on
PMDA-PDA线型聚酰亚胺的制备及可见光催化活性
合成PMDA-PDA聚酰氨酸溶液总是发生凝胶、结块现象，有什么办法可以避免？
在均苯四甲酸二酐-二氨基二苯醚(PMDA-ODA)分子结构中引入刚性对苯二胺(PDA),通过无规共聚法和共混法制备PI薄膜,采用XRD,TMA,TGA和万能试验机对薄膜聚集态结构及物理性能进行表征.结果表明:引入PDA后PI薄膜的拉伸强度和弹性模量提高,断裂伸长率下降,热膨胀系数和玻璃化转变温度降低.与无规共聚PI相比,共混法制备的...
The vertical CTE of PMDA-PDA is 4–7 times larger than the lateral CTE. The vertical CTE of BPDA-PDA is 14–20 times larger than the lateral CTE. It is believed that the thickness dependence of the anisotropy in CTE is caused by the in-plane orientation of the polyimide main chain. ...
For m-PDA, absorption to the surface occurs via its nitrogen atoms. HREELS results suggest that significant deprotonation of the amine groups occurs and that the plane of the aromatic ring is inclined away from the surface normal. For PMDA, the primary chemical interaction with the Ni is ...
A new interpretation of the kinetic model for the imidization reaction of PMDA-ODA and BPDA-PDA poly(amic acid)spoly(amic acid)imidizationkinetic modelIn this study, a new interpretation is given for the imidization of poly(amic acid)s based on the Seo ...
The valence band potential of the PMDA/PDA linear polyimide is 2.45 eV, showing that it has strong oxidizing property and strong oxidative degradation ability without constructing heterojunction.In order to prepare a kind of polyimide with high visible-light photocatalytic activity,linear polyimide (P...
Takeichi T,Eguchi Y,Kaburagi Y, et al.Carbonization and graphitization of polyimide films:Polyamide acid methyl ester of PMDA/PDA as a precursor. Journal of Applied Polymer Science . 1996Carbonization and graphitization of polyimide films: Polyamide acid methyl ester of PMDA/PDA as a precurso...
Study of out-of-plane elastic properties of PMDA-ODA and BPDA-PDA polyimide thin films. Thin solid films 1998;323:203-8.Liou, H.C.; Willecke, R.; Ho, P.S. Study of out-of-plane elastic properties of PMDA-ODA and BPDA-PDA polyimide thin films. Thin Solid Film. 1998, 323, 203-...