Triptycene Polyimides: Soluble Polymers with High Thermal Stability and Low Refractive Indices
Name
s1-ln8685641504548858-1939656818Hwf-1327864610IdV1989647100868564PDF_HI0001.pdf
Size
233.27 KB
Format
Adobe PDF
Checksum (MD5)
dfb7426a0f438f6d84461d5946b42268
Author(s)
Sydlik, Stefanie Arlene
Chen, Zhihua
Swager, Timothy M
Date Issued
January 2011
Journal
Macromolecules
Publisher
American Chemical Society (ACS)
Citation
Sydlik, Stefanie A., Zhihua Chen, and Timothy M. Swager. “Triptycene Polyimides: Soluble Polymers with High Thermal Stability and Low Refractive Indices.” Macromolecules 44.4 (2011): 976–980. © 2012 American Chemical Society
Version
Author's final manuscript
Abstract
A series of soluble, thermally stable aromatic polyimides were synthesized using commercially available five- and six-membered ring anhydrides and 2,6-diaminotriptycene derivatives. All of these triptycene polyimides (TPIs) were soluble in common organic solvents despite their completely aromatic structure due to the three-dimensional triptycene structure that prevents strong interchain interactions. Low solution viscosities (0.07−0.47 dL/g) and versatile solubilities allow for easy solution processing of these polymers. Nanoporosity in the solid state gives rise to high surface areas (up to 430 m[superscript 2]/g) and low refractive indices (1.19−1.79 at 633 nm), which suggest very low dielectric constants at optical frequencies. Polymer films were found to be amorphous. The decomposition temperature (T[subscript d]) for all of the polymers is above 500 °C, and no glass transition temperatures can be found below 450 °C by differential scanning calorimetry (DSC), indicating excellent prospects for high-temperature applications. This combination of properties makes these polymers candidates for spin-on dielectric materials.
MIT Department
Massachusetts Institute of Technology. Institute for Soldier Nanotechnologies
Massachusetts Institute of Technology. Department of Chemistry
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1021/ma101333p
