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Paper Abstract and Keywords
Presentation 2023-01-27 15:05
Colorless, Low-Dielectric, Optically Active Semi-Aliphatic Polyimide with Plant-Derived Isosorbide Backbone
Ririka Sawada, Ryohei Ishige, Shinji Ando (Tokyo Tech) OME2022-77
Abstract (in Japanese) (See Japanese page) 
(in English) Seven kinds of polyimides (PIs) incorporating an optically active bio-derived isosorbide (ISS) skeleton in the main chain (ISS-PIs) were prepared using a tetracarboxylic dianhydride derived from ISS and trimellitic anhydride. ISS-PIs showed excellent optical transparency, low refractive index, low dielectric constant, and small birefringence compared to conventional fully aromatic PIs. This may be attributed to the reduction of intermolecular interactions due to the bulky alicyclic ISS structure and the bent and flexible PI main chains, which suppressed in-plane orientation of the main chains and dense molecular packing between the PI chains. ISS-PI with excellent optical properties exhibits low dielectric constant (Dk) and moderate dissipation factor (Df) at 10-20 GHz, and ISS-PI and its model compounds show clear circular dichroism in the UV region both in solution and in the solid state due to the intrinsic optical activity of the ISS, and the chiral structure is maintained in solid PI films. Furthermore, ISS-PI has sufficient thermal stability, with glass transition temperatures (Tg) of about 260°C and 5 wt% weight loss temperatures (Td5) of about 400°C. The present study clarified the relationships among the excellent optical, dielectric, thermal properties, and the stereochemical structure, and the aggregation state of ISS-PI.
Keyword (in Japanese) (See Japanese page) 
(in English) Polyimide / Isosorbide / Optically active / High transparency / Low refractive index / Low dielectric constant / /  
Reference Info. IEICE Tech. Rep., vol. 122, no. 369, OME2022-77, pp. 14-17, Jan. 2023.
Paper # OME2022-77 
Date of Issue 2023-01-20 (OME) 
ISSN Online edition: ISSN 2432-6380
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All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
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Conference Information
Committee OME  
Conference Date 2023-01-27 - 2023-01-28 
Place (in Japanese) (See Japanese page) 
Place (in English) Kochi Shoko Kaikan 
Topics (in Japanese) (See Japanese page) 
Topics (in English) biotechnology, medical engineering, interfacial phenomena and reaction 
Paper Information
Registration To OME 
Conference Code 2023-01-OME 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Colorless, Low-Dielectric, Optically Active Semi-Aliphatic Polyimide with Plant-Derived Isosorbide Backbone 
Sub Title (in English)  
Keyword(1) Polyimide  
Keyword(2) Isosorbide  
Keyword(3) Optically active  
Keyword(4) High transparency  
Keyword(5) Low refractive index  
Keyword(6) Low dielectric constant  
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Keyword(8)  
1st Author's Name Ririka Sawada  
1st Author's Affiliation Tokyo Institute of Technology (Tokyo Tech)
2nd Author's Name Ryohei Ishige  
2nd Author's Affiliation Tokyo Institute of Technology (Tokyo Tech)
3rd Author's Name Shinji Ando  
3rd Author's Affiliation Tokyo Institute of Technology (Tokyo Tech)
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Speaker Author-1 
Date Time 2023-01-27 15:05:00 
Presentation Time 35 minutes 
Registration for OME 
Paper # OME2022-77 
Volume (vol) vol.122 
Number (no) no.369 
Page pp.14-17 
#Pages
Date of Issue 2023-01-20 (OME) 


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