writer：Yongbing Zhuang, Jong Geun Seong, Yu Seong Do, Won Hee Lee, Moon Joo Lee, Michael D. Guiver*, Young
keywords：High-Strength, Soluble Polyimide Membranes
source：期刊
specific source：Journal of Membrane Science
Issue time：2016年

Three soluble and processable polyimides (PIs) were prepared in high yield from imide-containing diamines via

Tr?ger’s Base (TB) polymerization reactions using dimethoxymethane

(DMM). The three novel imide-containing diamines were easily synthesized

from a commercial diamine precursor, 2,6-diaminotoluene and three

commercially available dianhydrides. The corresponding membranes had

fractional free volume (FFV) values in the range of

0.170–0.200, good mechanical, thermal and gas transport properties,

which were correlated with the polymer chain structures. The

incorporation of TB units into the PI backbone improved the gas

transport performance. The TB-based polyimide membrane from BTDA had a

CO2 permeability of 19.6 Barrer, an elongation at break of 9.0%, and a tensile strength of 114.2 MPa, suggesting better properties as gas separation membranes than Matrimid® polyimide from the same BTDA.