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http://dx.doi.org/10.7317/pk.2015.39.2.275

Syntheses of Colorless and Transparent Copolyimides and Comparison of the Properties of Their Copolyimides  

Ju, Jieun (Department of Polymer Science and Engineering, Kumoh National Institute of Technology)
Chang, Jin-Hae (Department of Polymer Science and Engineering, Kumoh National Institute of Technology)
Publication Information
Polymer(Korea) / v.39, no.2, 2015 , pp. 275-280 More about this Journal
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(trifluoromethyl)benzidine (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.
Keywords
copolyimide; films; thermal property; optical transparency;
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