Fabrication of polyimide copolymer films for controlled optical retardation

Ki Ho Nam, Wansoo Lee, Wonbong Jang, Haksoo Han

Research output: Contribution to journalArticle

Abstract

Poly(amic acid)s were successfully synthesized from 3,3',4,4'-benzophenonetetracarboxylic dianhydride (BTDA) or 4,4'-hexafluoroisopropylidene diphthalic dianhydride (6FDA) with different molar fractions of 4,4'-oxyaniline (ODA) and 2,2'-bis(3-amino-4-hydroxyphenyl)hexafluoropropane diamine (AHHFP). Stepwise thermal imidization method were used for preparing polyimide copolymer fdms. Two-axis out-of-plane retardations were detected for optical retardation (R0 and R&) measurement using an LCD panel measuring device. The optical transparency and yellow index were measured by a ultraviolet-visible (UV-vis) spectrophotometer and a color-difference meter. Their thermal properties were investigated using differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). The physical properties of PI copolymer films were found to be strongly dependent upon the morphological structure and composition. After all, RA of PI copolymer films were possibly controlled.

Original languageEnglish
Pages (from-to)561-567
Number of pages7
JournalPolymer (Korea)
Volume40
Issue number4
DOIs
Publication statusPublished - 2016 Jul

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Polyimides
Copolymers
Fabrication
Diamines
Spectrophotometers
Liquid crystal displays
Transparency
Thermogravimetric analysis
Differential scanning calorimetry
Thermodynamic properties
Physical properties
Color
Acids
Chemical analysis

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Polymers and Plastics
  • Materials Chemistry

Cite this

Nam, Ki Ho ; Lee, Wansoo ; Jang, Wonbong ; Han, Haksoo. / Fabrication of polyimide copolymer films for controlled optical retardation. In: Polymer (Korea). 2016 ; Vol. 40, No. 4. pp. 561-567.
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Fabrication of polyimide copolymer films for controlled optical retardation. / Nam, Ki Ho; Lee, Wansoo; Jang, Wonbong; Han, Haksoo.

In: Polymer (Korea), Vol. 40, No. 4, 07.2016, p. 561-567.

Research output: Contribution to journalArticle

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AU - Nam, Ki Ho

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AU - Han, Haksoo

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AB - Poly(amic acid)s were successfully synthesized from 3,3',4,4'-benzophenonetetracarboxylic dianhydride (BTDA) or 4,4'-hexafluoroisopropylidene diphthalic dianhydride (6FDA) with different molar fractions of 4,4'-oxyaniline (ODA) and 2,2'-bis(3-amino-4-hydroxyphenyl)hexafluoropropane diamine (AHHFP). Stepwise thermal imidization method were used for preparing polyimide copolymer fdms. Two-axis out-of-plane retardations were detected for optical retardation (R0 and R&) measurement using an LCD panel measuring device. The optical transparency and yellow index were measured by a ultraviolet-visible (UV-vis) spectrophotometer and a color-difference meter. Their thermal properties were investigated using differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). The physical properties of PI copolymer films were found to be strongly dependent upon the morphological structure and composition. After all, RA of PI copolymer films were possibly controlled.

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