Synthesis and characterization of highly-fluorinated colorless polyimides derived from 4,40-((perfluoro-[1,10-biphenyl]-4,40-diyl) bis(oxy))bis(2,6-dimethylaniline) and aromatic dianhydrides

Title
Synthesis and characterization of highly-fluorinated colorless polyimides derived from 4,40-((perfluoro-[1,10-biphenyl]-4,40-diyl) bis(oxy))bis(2,6-dimethylaniline) and aromatic dianhydrides
Authors
여현욱고문주구본철유남호
Keywords
polyimide; colorless; refractive index; dielectric constant
Issue Date
2015-10
Publisher
Polymer
Citation
VOL 76, 280-286
Abstract
The authors report the synthesis and characterization of a polyimide (PI) series derived from 4,40-((perfluoro-[1,10-biphenyl]-4,40-diyl)bis(oxy))bis(2,6-dimethylaniline) (8FBPODMA). The 8FBPODMA monomer containing a perfluorobiphenyl group with two 2,6-dimethylaniline units connected by an ether bond was synthesized and polycondensed with several aromatic dianhydrides, including 4,40-biphthalic anhydride (BPDA), 4,40-oxydiphthalic anhydride (ODPA), pyromellitic dianhydride (PMDA), and 4,40-(hexafluoroisopropylidene)diphthalic anhydride (6FDA), by the traditional two-step imidization procedure. All PIs shows high optical transparency, higher than 80% at 500 nm for a thickness of ca. 10 mm and good thermal properties. The thermal decomposition temperatures (T10%) of the PIs are in the range of 507e527 C and the glass transition temperatures (Tg) are in the range of 280e345 C. In addition, the PIs have low refractive indices because of their high fluorine contents. In particular, 8FBPODMAe6FDA shows a very low refractive index (1.5389) and a low birefringence (0.0054) at 637 nm.
URI
http://pubs.kist.re.kr/handle/201004/50313
ISSN
00323861
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KIST Publication > Article
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