Synthesis and characterization of a microporous 6FDA-polyimide made from a novel carbocyclic pseudo Tröger's base diamine: Effect of bicyclic bridge on gas transport properties

Abstract

Synthesis and characterization of a microporous 6FDA-polyimide made from a novel carbocyclic pseudo Tröger's base diamine: Effect of bicyclic bridge on gas transport properties,

Molecular engineering of high-performance nanofiltration membranes from intrinsically microporous poly(ether-ether-ketone)

“…In particular, the decomposition temperature values for iPEEK-SBI (T d,5% ¼ 495 C) and iPEEK-Trip (T d,5% ¼ 526 C) were comparable with the commercial PEEK (T d,5% ¼ 550 C), while iPEEK-TB (T d,5% ¼ 405 C) showed a moderate decrease due to the early decomposition of the Tröger's base bridge. 31 The glass transition temperatures (T g ) of the polymers, obtained by differential scanning calorimetry (DSC), were signicantly higher than that of the conventional PEEK (T g ¼ 143 C). For instance, iPEEK-Trip displayed the highest T g of 256 C, followed by iPEEK-SBI of 243 C, and iPEEK-TB of 197 C (Fig.…”

A Facilitated Gas Transport Strategy: 3D Porous Hyper-crosslinked Polymers Incorporating 6FDA-based Polyimide Matrix for the Design and Fabrication of Mixed Matrix Membranes with High Permeability

“…MMMs consist of llers with porous structures in a polymeric matrix, including rubber polymers and glassy polymers. Normally, glassy polymers such as polysulfone [15,16], cellulose [17,18], and polyimide [19][20][21] can nicely separate well gas. Of these, polyimide (PI) with highly thermal stability, good chemical stability, and strong mechanical stability has been extensively used as gas separation membrane [22,23].…”

Synthesis and characterization of new polyimides from diphenylpyrene dianhydride and ortho methyl substituted diamines

“…4 The most commonly used dianhydride monomers in the preparation of polyimides for gas separation membranes are 4,4 0 -(hexauoroisopropylidene)diphthalic anhydride (6FDA), pyromellitic dianhydride (PMDA) and 4,4 0 -oxidiphthalic anhydride (ODPA). [5][6][7][8][9][10] Nevertheless, the synthesis of new dianhydrides is a subject of considerable current interest since they allow the design and synthesis of novel polyimides for gas separation membranes. In this regard, Ma et al reported two novel carbocyclic pseudo-Tröger's derived dianhydrides, which were employed to prepare soluble polyimides with an excellent gas separation performance, exceeding the upper bound for O 2 /N 2 , and H 2 /CH 4 .…”