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http://dx.doi.org/10.7317/pk.2012.36.4.448

Analysis of Thermal Imidization Kinetics of 6FDA-BAPP Polyimide in Relation with Solvent Evaporation  

Lee, Eun-Young (Department of Polymer Science and Engineering, Sungkyunkwan University)
Hwang, Tae-Seon (Department of Polymer Science and Engineering, Sungkyunkwan University)
Nam, Jae-Do (Department of Polymer Science and Engineering, Sungkyunkwan University)
Publication Information
Polymer(Korea) / v.36, no.4, 2012 , pp. 448-454 More about this Journal
Abstract
A poly(amic acid) (PAA) was prepared by reaction of 4,4'-(hexafluoroisopropylidene)diphthalic anhydride (6FDA) and 2,2-bis[4-(4-aminophenoxy)phenyl]hexafluropropane (BAPP) in N,N-dimethylacetamide (DMAc). The cast films of the synthesized PAA were thermally treated at different temperatures to create polyimide (PI) films. The heat treatment temperature varied between 80 and $230^{\circ}C$ to investigate the imidization index in relation with the solvent evaporation rates. The progress of PAA imidization was examined using a thermogravimetric analyzer (TGA) and a Fourier transform infrared spectroscope (FTIR) at various time and temperature. The experimental results showed that the imidization index was fast at the initial stage in the presence of solvent, DMAc, reaching the final imidization. When the imidization temperature is high over $200^{\circ}C$, the imidization index decreased because the solvent was evaporated too fast.
Keywords
polyimide; thermal imidization; solvent evaporation; imidization index;
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