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Syntheses of Colorless and Transparent Copolyimides and Comparison of the Properties of Their Copolyimides
- Authors
- Ju, Jieun; Chang, Jin-Hae
- Issue Date
- Mar-2015
- Publisher
- POLYMER SOC KOREA
- Keywords
- copolyimide; films; thermal property; optical transparency
- Citation
- POLYMER-KOREA, v.39, no.2, pp 275 - 280
- Pages
- 6
- Journal Title
- POLYMER-KOREA
- Volume
- 39
- Number
- 2
- Start Page
- 275
- End Page
- 280
- ISSN
- 0379-153X
2234-8077
- Abstract
- Two series of copolyimides (Co-PIs) were prepared by reacting 4,4'-(hexafluoroisopropylidene) diphthalic anhydride (6FDA) and 1,2,4,5-benzentetra carboxylic dianhydride (pyromellitic dianhydride) (PMDA), as dianhydrides based on 4,4'-biphthalic anhydride (BPA) and 2,2'-bis(trifluoromethypbenzidine (TFB) by using thermal- and chemical imidizations. Co-PIs films with different dianhydride monomer compositions were compared in terms of their thermal properties and optical transparencies. The addition of PMDA was more effective than the addition of 6FDA for improving the thermal properties. Meanwhile, 6FDA is more effective in optical transparencies.
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