Liu He-zhou
2012
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Journal
Journal of Functional Polymers
Abstract
4,4′-(Hexafluoroisopropylidene)diphthalic anhydride(6FDA) was polymerized with 2,2-bis(3-amino-4-hydroxyphenyl) hexafluoropropane(BAPAF).Fluorinated polyimide was obtained via a two-step polycondensaion procedure.The effect of reaction factors like raw materials′ ratio,imidization temperature,imidization time and catalyst on the molecular weight were studied.Polyimide was characterized by FT-IR,GPC,XRD and solubility test.Results showed that polyimide of 6FDA-BAPAF obtained under imidization temperature(80 °C) had high molecular weight reaching 4.5×104,which displayed excellent thermal properties with Td higher than 490 °C and had excellent solubility in polar aprotic organic solvents such as NMP,DMF,DMAc,DMSO,THF and acetone.