Sung Ho Kim, Oun-Ho Park, et al.
Small
A series of polyimides was synthesized to facilitate the study of several structure/property relationships, including relative permittivity, moisture absorption, free volume, and viscoelastic transitions. This series was based on hexafluoroisopropylidene bis(phthalic anhydride) and various diamines, with the intention of having a number of fluorine/hydrogen and symmetric/asymmetric analog sets. Since several of the fluorinated diamines were exceptionally unreactive, a multistep polycondensation polymerization technique was developed to obtain materials of sufficient molecular weight for property evaluation. Effects of fluorine incorporation on the aforementioned properties are reported. © 1994, American Chemical Society. All rights reserved.
Sung Ho Kim, Oun-Ho Park, et al.
Small
J.R. Thompson, Yang Ren Sun, et al.
Physica A: Statistical Mechanics and its Applications
U. Wieser, U. Kunze, et al.
Physica E: Low-Dimensional Systems and Nanostructures
Corneliu Constantinescu
SPIE Optical Engineering + Applications 2009