標題: Effect of the polyimide structure and ZnO concentration on the morphology and characteristics of polyimide/ZnO nanohybrid films
作者: Hsu, SC
Whang, WT
Hung, CH
Chiang, PC
Hsiao, KN
材料科學與工程學系
Department of Materials Science and Engineering
關鍵字: nanocomposites;polyimides;structure-property relations;thermal properties;ZnO
公開日期: 21-一月-2005
摘要: A series of polyimide/ZnO nanohybrid films with different ZnO content were prepared from a rigid pyromellitic dianhydride-4,4'-diaminodiphenyl ether (PMDA-ODA) polyimide (PI) and a flexible 3,3,4,4-benzophenonetetracarboxylic acid dianhydride-4,4'-diaminodiphenyl ether (BTDA-ODA) PI with ZnO nanoparticles (3-4 nm). Fourier-transform infrared (FT-IR) and X-ray photoelectron spectroscopy (XPS) depict that the ZnO nanoparticles function as a physical cross-linking agent with PI through hydrogen bonding between the OH on the ZnO nanoparticles and the C=O of the imide groups. ZnO nanoparticles in the rigid PMDA-ODA matrix cause a larger percentage decrease in the coefficient of linear thermal expansion (CTE) than in the flexible BTDA-ODA matrix. The BTDA-ODA/ZnO hybrid films have two transition peaks in dynamic mechanical tan curves, but PMDA-ODA/ZnO hybrid films only have one transition peak. Thermogravimetric analysis reveals that ZnO decreases the thermal degradation temperature (T-d) in both hybrid films, but less so in PMDA-ODA/ZnO films. Trans-mission electron microscopy (TEM) images reveal that the rigid matrix induces larger particle size (30-40 nm) compared to the flexible matrix (10-15 nm).
URI: http://dx.doi.org/10.1002/macp.200400326
http://hdl.handle.net/11536/24118
ISSN: 1022-1352
DOI: 10.1002/macp.200400326
期刊: MACROMOLECULAR CHEMISTRY AND PHYSICS
Volume: 206
Issue: 2
起始頁: 291
結束頁: 298
顯示於類別:期刊論文


文件中的檔案:

  1. 000226696300013.pdf