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Download Optoelectronic Devices and Properties by Edited by Oleg Sergiyenko PDF

By Edited by Oleg Sergiyenko

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Coupling agent with amino functional group (3-Aminopropyl)triethoxysilane (APTEOS) has been supplied by Aldrich and used without further purification. 3. 1 Thermo-Mechanical properties of substrates Thermal properties of substrates under investigation have been evaluated in order to determine glass transition temperature Tg and degradation temperature by differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) respectively. The glass transition (Tg) was investigated by DSC-Q1000 (TA Instruments).

2003). Clearly, surface roughness of the treated polymers was higher than the untreated polyester. 7 times higher than unmodified material. As expected, the silane treatment increase the surface roughness of polyester film. 6 Nano-indentation test Nano-mechanical tests on SiO2 layers deposited on AryLite™ have been carried out to further investigate the interface between organic substrate and inorganic layers. Since coating of SiO2 is less than 1 μm thick, small volume testing methods such as depthsensing nano-indentation and nano-scratch were used as a indicator of film adhesion strength.

In this way it’s possible to change hydrophobic polymer surface into a hydrophilic one without affecting the bulk properties. Adhesion can be improved also by using an adhesion promoter such as a silane on the polymer surface. In this work the surface of polyester films was modified via chemical solution. Afterward, samples have been treated with (3-Aminopropyl)triethoxysilane (APTEOS) that function as an adhesion promoter between organic substrate and SiO2 layer. In particular, SiOH silane functional groups are suitable for coupling with SiO2 layer.

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