Please use this identifier to cite or link to this item:
https://dspace.ctu.edu.vn/jspui/handle/123456789/94267
Title: | A short review on transparent and colorless polyimides |
Authors: | Ha, Chang-Sik |
Keywords: | Polyimides Transparent Colorless |
Issue Date: | 2022 |
Series/Report no.: | Vietnam Journal of Science and Technology;Vol.60, No.03 .- P.333-342 |
Abstract: | Polyimides are known as high performance polymers that are widely used in opto-electronic devices as well as other high engineering applications. Among polyimides, in particular transparent and colorless polyimides (CPIs) are recently in high demand in opto-electronic industries because of their transparency as well as balanced thermo-mechanical properties. It is known that the charge transfer complex (CTC) formation in aromatic polyimides provides them to have brownish-yellow colors as well as optical opaqueness, for which their application in optoelectronic devices are limited, while the CTC also donates a high glass transition temperature (Tg) by restricting their segmental mobility. In this short review, recent trends to prepare CPIs with balanced thermo-mechanical properties were overviewed, which have been reported mainly by our group for years, with expecting to be a useful guideline to the synthesis and design of CPIs. Main efforts to synthesize CPIs have been generally oriented toward to the reduction of the intra- or inter charge transfer interactions between diamines and dianydrides in the aromatic polyimides through the design conceptions including the incorporation of bulky substituents, non-coplanar segments, fluorine atoms, and alicyclic diamines and dianhydrides, etc. to prepare PIs. Thus prepared CPIs possess good transparency and colorlessness with high Tg’s. |
URI: | https://dspace.ctu.edu.vn/jspui/handle/123456789/94267 |
ISSN: | 2525-2518 |
Appears in Collections: | Vietnam journal of science and technology |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
_file_ Restricted Access | 3.19 MB | Adobe PDF | ||
Your IP: 3.145.88.155 |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.