Using pyromellitic dianhydride (PMDA) and 4,4’ diaminodiphenyl ether (ODA) as monomer materials, polyimide thin films have been prepared onto glass substrate by vapor deposition polymerization under a vacuum of 2.666...Using pyromellitic dianhydride (PMDA) and 4,4’ diaminodiphenyl ether (ODA) as monomer materials, polyimide thin films have been prepared onto glass substrate by vapor deposition polymerization under a vacuum of 2.666×10 -3 Pa and thermal curing of polyamic acid film in a vacuum at temperature of 150～200 ℃ for 60 min. In this process, the polymerization can be carried out through controlling the stoichiometric ratio, heating time and deposition ratio of the two monomers. The composition, the structure and properties of the polyimide films are investigated with IR spectrum, XRD, and SEM methods. The results show that the polyimide films by vapor deposition polymerization have good electrical properties and thermal stability. Therefore, the vapor deposition polymerization process is considered as a possible method of polymerization for other polymers.展开更多
Using Cu-phthalocyanine（CuPc）,4,4’-diaminodiphenyl ether and pyromellitic dianhydride as monomer materials, polyimide（PI） thin films doped-CuPc have been prepared onto glass substrate by vapor phase co-deposition...Using Cu-phthalocyanine（CuPc）,4,4’-diaminodiphenyl ether and pyromellitic dianhydride as monomer materials, polyimide（PI） thin films doped-CuPc have been prepared onto glass substrate by vapor phase co-deposition polymerization under a vacuum of 2×10-3Pa and thermal curing of polyamic acid film in at temperature of 150-200℃ for 60min. In this process, the polymerization can be carried out through controlling the stoichiometric ratio, heating time and deposition rates of the three monomers. IR spectrum identifies the designed chemical structure of the polymer. The absorption of polyimide doped-CuPc is very intense in vis-range and near-infrared by UV-Vis spectrum. And, the PI films doped-CuPc polymerized by vapor phase deposition have uniformity, fine thermal stability and good nonlinear optical properties, and the third-order optical nonlinear susceptibility χ（3） with degenerate four-wave mixing can be 1.984×10-9ESU.展开更多
采用物理气相沉积法,在加热或不加热的抛光玻璃基片上蒸镀N aC l脱膜剂,再混合蒸镀均苯四甲酸二酐(PMDA)和二氨基二苯醚(ODA)两种单体,然后在空气环境中对样品进行热亚胺化。在去离子水中脱膜后获得厚度为100nm的聚酰亚胺自支撑膜。采...采用物理气相沉积法,在加热或不加热的抛光玻璃基片上蒸镀N aC l脱膜剂,再混合蒸镀均苯四甲酸二酐(PMDA)和二氨基二苯醚(ODA)两种单体,然后在空气环境中对样品进行热亚胺化。在去离子水中脱膜后获得厚度为100nm的聚酰亚胺自支撑膜。采用傅里叶变换红外光谱仪(FT IR)对样品进行化学结构分析并且根据谱线计算了不同热处理下薄膜的亚胺化程度。采用原子力显微镜,对样品进行表面形貌分析,结果表明给基片加热能改善聚酰亚胺薄膜的表面形貌。展开更多
文摘Using pyromellitic dianhydride (PMDA) and 4,4’ diaminodiphenyl ether (ODA) as monomer materials, polyimide thin films have been prepared onto glass substrate by vapor deposition polymerization under a vacuum of 2.666×10 -3 Pa and thermal curing of polyamic acid film in a vacuum at temperature of 150～200 ℃ for 60 min. In this process, the polymerization can be carried out through controlling the stoichiometric ratio, heating time and deposition ratio of the two monomers. The composition, the structure and properties of the polyimide films are investigated with IR spectrum, XRD, and SEM methods. The results show that the polyimide films by vapor deposition polymerization have good electrical properties and thermal stability. Therefore, the vapor deposition polymerization process is considered as a possible method of polymerization for other polymers.
基金Natural Science Foundation of Shaanxi Province ( 2004CS110005 ) Research Foundation of Northwestern Polytechnical University
文摘Using Cu-phthalocyanine（CuPc）,4,4’-diaminodiphenyl ether and pyromellitic dianhydride as monomer materials, polyimide（PI） thin films doped-CuPc have been prepared onto glass substrate by vapor phase co-deposition polymerization under a vacuum of 2×10-3Pa and thermal curing of polyamic acid film in at temperature of 150-200℃ for 60min. In this process, the polymerization can be carried out through controlling the stoichiometric ratio, heating time and deposition rates of the three monomers. IR spectrum identifies the designed chemical structure of the polymer. The absorption of polyimide doped-CuPc is very intense in vis-range and near-infrared by UV-Vis spectrum. And, the PI films doped-CuPc polymerized by vapor phase deposition have uniformity, fine thermal stability and good nonlinear optical properties, and the third-order optical nonlinear susceptibility χ（3） with degenerate four-wave mixing can be 1.984×10-9ESU.
文摘采用物理气相沉积法,在加热或不加热的抛光玻璃基片上蒸镀N aC l脱膜剂,再混合蒸镀均苯四甲酸二酐(PMDA)和二氨基二苯醚(ODA)两种单体,然后在空气环境中对样品进行热亚胺化。在去离子水中脱膜后获得厚度为100nm的聚酰亚胺自支撑膜。采用傅里叶变换红外光谱仪(FT IR)对样品进行化学结构分析并且根据谱线计算了不同热处理下薄膜的亚胺化程度。采用原子力显微镜,对样品进行表面形貌分析,结果表明给基片加热能改善聚酰亚胺薄膜的表面形貌。
