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http://dx.doi.org/10.14478/ace.2015.1121

Synthesis of Polyimides Derived from 2,2-Bis[4-(4-aminobenzoyl)phenoxy]hexafluoropropane and Aromatic Dianhydrides  

Park, Jung Hye (Department of Material Engineering, Pukyong National University)
Ahn, Byung Hyun (Department of Material Engineering, Pukyong National University)
Publication Information
Applied Chemistry for Engineering / v.27, no.1, 2016 , pp. 50-55 More about this Journal
Abstract
Aromatic diamines containing hexafluoroisopropylidene and ester moiety were synthesized from 4,4'-hexafluoroisopropylidene diphenol and nitrobenzoyl chloride. The reaction of aromatic diamines with hexafluoroisopropylidene phthalicdianhydride (6FDA) or pyromellitic dianhydride (PMDA) gave four kinds of poly(amic acid)s. Their inherent viscosities ranged from 0.196 to 0.346 dL/g. Poly(amic acid)s were converted to polyimides by thermal imidization. The glass transition temperatures ($T_g$) of polyimides were between 241 and $289^{\circ}C$. The 5% weight loss temperatures were recorded in the range of $430{\sim}492^{\circ}C$. The tensile strength of polyimide films were measured as 29.84~64.38 MPa.
Keywords
hexafluoroisopropylidene; aromatic diamine; poly(amic acid); polyimide;
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