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Synthesis and Characterization of Highly Refractive Polyimides Derived from 2,7-Bis(4′-aminophenylenesulfanyl)thianthrene-5,5,10,10-tetraoxide and Aromatic Dianhydrides by Nam-Ho You; Yasuo Suzuki; Tomoya Higashihara; Shiji Ando; Mitsuru Ueda is a Materials Science article available to read on EtoBox.

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New polyimides (PIs) containing thioether and sulfonyl groups in their main chains have been developed. These PIs were synthesized by a two-step polycondensation procedure from several dianhydrides such as 4,4 0 -[p-thiobis(phenylenesulfanyl)] diphthalic anhydride (3SDEA), 4,4 0 -oxydiphthalic anhydride (ODPA), 4,4 0 -[sulfonylbis(phenylenesulfanyl)] diphthalic anhydride (pDPSDA) and a new sulfonyl and sulfur-containing aromatic diamine, 2,7-bis(4 0 -aminophenylenesulfanyl)thianthrene-5,5,10,10-tetraoxide (APTTT). All of the PIs show good thermal and optical properties such as optical transparency higher than 80% at 450 nm for a thickness of ca. 10 mm, glass transition temperatures higher than 250 C, thermal decomposition temperatures (T 10% ) in the range of 504-514 C. Because of the two sulfonyl groups at each monomer unit in the polymer main chain, all of the PIs show good transparency maintaining relatively high refractive index.

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Author

Nam-Ho You; Yasuo Suzuki; Tomoya Higashihara; Shiji Ando; Mitsuru Ueda

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0032-3861)

Published

2009

Language

EN

Field

Materials Science (Physical Sciences)