Effects of addition orders on the proper
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Li Ren; Fansen Zeng; Ping Ning; Zhiquan Chen; Tze-Man Ko
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Article
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2000
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John Wiley and Sons
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English
β 150 KB
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A series of fluorine-containing copolyimides were synthesized by three different orders of addition of monomers. The fluorine-containing copolyimides were prepared by the reaction of 4,4Π-diaminodiphenylmethane (DDM) with 2,2Π-bis(3,4dicarboxyphenyl) hexafluoropropane dianhydride (6FDA), and pyromel