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KMID : 1024520030120040481
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Journal of the Environmental Sciences
2003 Volume.12 No. 4 p.481 ~ p.485
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A Study on the Environmental Properties of Polyimide/Silica Composites Prepared by Sol-Gel Method
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Park Seong-Soo
Hong Seong-Su
Lee Sung-Hwan
Kim Sung-Wan
Park Jae-Hyun
Park Hee-Chan
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Abstract
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Two types of polyimide/silica composite films were prepared using sol-gel method through hydrolysis and polycondensation of tetraethoxysilane (TEOS) with the polyamic acid (PAA) and end-capped PAA solution. Samples were characterized by the means of differential thermogravimetry, X-ray diffractometry, scanning electron microscopy, universal test, impedance analyzer, chemical resistance test, etc. All of the PAA/silanol solutions heat-treated at 300 for 6h were transformed to polyimide/silica composites. It has been demonstrated that the properties of polyimide/silica composites were affected by the amount of silica addition and the bend type existed between polyimide and silica.
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KEYWORD
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Polyamic acid, Polyimide, Silica, Sol-gel, Composite, Properties
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