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NTIS 바로가기Journal of polymer science Part A, Polymer chemistry, v.53 no.7, 2015년, pp.944 - 950
Yeo, Hyeonuk (Carbon Convergence Materials Research Center, Institute of Advanced Composites Materials, Institute of Science and Technology, Eunha‐) , Lee, Jiye (ri san 101, Bondong‐) , Goh, Munju (eup, Wanju‐) , Ku, Bon‐Cheol (gun, Jeollabuk‐) , Sohn, Honglae (do, 565‐) , Ueda, Mitsuru (905, Republic of Korea) , You, Nam‐Ho (Carbon Convergence Materials Research Center, Institute of Advanced Composites Materials, Institute of Science and Technology, Eunha‐)
ABSTRACTThe 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 4,4′‐[p‐thio bis(phenylenesulfanyl)]diphthalic anhydride (3SDEA), 4,4′‐biphthalic anhydride (BPDA), and 4,4′‐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 μm 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%). © 2015 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2015, 53, 944–950
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