Preparation and Properties of Polyimides and Polycarbonates Containing Active Ester Groups Curing with Epoxy Resin
| Autor: | Jian-Ren Chan, 陳建任 |
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| Rok vydání: | 2018 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 106 In this paper, the polyimide with an active ester group in the main chain is cured with an epoxy resin, and the polycarbonate which containing carbonate group is cured with epoxy resin. The reaction is judged to be successful by FTIR and DSC. (1) The thermal properties of the epoxy resin and polyimide after curing are between 220 and 250 °C. Compared with the cured product formed by the common curing agent DDS1, the use of polyimide as a curing agent to form a cured product shows better thermal properties, and the polyimide cured with the epoxy resin have only one Tg and it is means good compatibility. Enhancing hydrophobic properties and dielectric properties, the active ester is introduced into the structure for transesterification, which can avoid the generation of secondary alcohol and thus reduce its polarity. Further introduction of the fluorine-containing structure can increase the hydrophobicity and lower the dielectric constant to 2.77 U and the contact angle is 83.15 °. The tensile properties increase the mechanical strength of the epoxy resin due to its high degree of crosslinking. (2) In the polycarbonate part, it is presumed that the polycarbonate and the epoxy resin are cured to be excellent compatibility materials by the Tg obtained, and the use of this method (using polycarbonate as a curing agent) can solve the current polycarbonate recovery. The problem can be used in materials without degradation, etc., and research report in this direction can be carried out in the future. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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