The Preparation and Properties of Butanetetracarboxyl - Base Polyimide Gas Separation Membranes

Polymides with excellent thermal, mechanical durability and good selecpermeability have attracted much a attention for their potential use in gas separation. The aim of this paper is to developed the range of only aromatic polymide membrane material by synthesized butanetetracarboxyl-base aliphatic polyimide gas separation material. The morpholgical structure,permeability,solubility and relationship of permeability and chain flexibility of this aliphatic polyimide material were studied firstly.