Permeability and Permselectivity of HQDEA-BASED and BPADA-based Polyetherimides and HQDEsA-ODA

Chem. J. Chinese Universities ›› 1994, Vol. 15 ›› Issue (6): 937.

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Permeability and Permselectivity of HQDEA-BASED and BPADA-based Polyetherimides and HQDEsA-ODA

LI Yue-Sheng¹, DING Meng-Xian², XU Ji-Ping²

1. Institute for Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027;
2. Changchun Institute of Applied Chemistry, Academia Sinica, Changchun

Received:1993-06-07 Revised:1993-09-30 Online:1994-06-24 Published:1994-06-24

Abstract

Abstract: Aseries of aromatic polyimides from 3 kinds of dianhydrides containing ether bond and ester bond were prepared byconventional procedure.Gas permeabilities for 6 kinds of polymers to H₂, O₂ and N₂ have been measured at the temperature from ambient up to 150℃.There is a very large difference in the permeability coefficients of the polyimides accompanied the difference in polymer structure.BPADA-based polyetherimides with the largest free volume have the highest permeability, while polyesterimide(HQDEsA-ODA)with the smallest free volume has the lowest permeability, being favorable barrier polymer.

Key words: Polyetherimide, Polyesterimide, Membrane, Permeability

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LI Yue-Sheng, DING Meng-Xian, XU Ji-Ping. Permeability and Permselectivity of HQDEA-BASED and BPADA-based Polyetherimides and HQDEsA-ODA[J]. Chem. J. Chinese Universities, 1994, 15(6): 937.

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Permeability and Permselectivity of HQDEA-BASED and BPADA-based Polyetherimides and HQDEsA-ODA

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