Synthesis and Characterization of High Refractive Index Polyimides Derived from 2,5-Bis(4-Aminophenylenesulfanyl)-3,4-Ethylenedithiothiophene and Aromatic Dianhydrides

Title
Synthesis and Characterization of High Refractive Index Polyimides Derived from 2,5-Bis(4-Aminophenylenesulfanyl)-3,4-Ethylenedithiothiophene and Aromatic Dianhydrides
Authors
여현욱이지예고문주구본철손홍래Mitsuru Ueda유남호
Keywords
polyimide; refractive index
Issue Date
2015-04
Publisher
Journal of polymer science Part A, Polymer chemistry
Citation
VOL 53, NO 7, 944-950
Abstract
The authors describe the synthesis and characterization of the polyimide (PI) series containing a 2,5-bis(4-aminophenylenesulfanyl)-3,4-ethylenedithiothiophene (APSEDTT) moiety in their main chain. The APSEDTT monomer with high sulfur content was prepared and polymerized with several aromatic dianhydrides such as 4,40-[p-thio bis(phenylenesulfanyl)]-diphthalic anhydride (3SDEA), 4,40-biphthalic anhydride (BPDA), and 4,40-oxydiphthalic anhydride (ODPA) by the traditional two-step polycondensation procedure. All PIs exhibited high transparency, higher than 75% at 550 nm for a thickness of about 20 lm and good thermal properties such as thermal decomposition temperatures (T10%) in the range of 409–521 C. In addition, the PIs have extraordinarily excellent optical properties in refractive index and birefringence as originally designed. In particular, the PI derived from APSEDTT and 3SDEA showed a high refractive index (1.7586), and a low birefringence (0.0087) because of their very high sulfur content (27.7%).
URI
http://pubs.kist.re.kr/handle/201004/49426
ISSN
0887624X
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