THE EFFECT OF MOLECULAR STRUCTURE ON THE PERMEABILITIES OF POLYMIDES

ZHANG Junyan; LIU Weimin; XUE Qunji

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THE EFFECT OF MOLECULAR STRUCTURE ON THE PERMEABILITIES OF POLYMIDES

Research Bulletin | 更新时间：2021-03-19

- THE EFFECT OF MOLECULAR STRUCTURE ON THE PERMEABILITIES OF POLYMIDES
- Acta Polymerica Sinica Issue 2, Pages: 227-231(1999)
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- Published：20 April 1999，
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ZHANG Junyan, LIU Weimin, XUE Qunji. THE EFFECT OF MOLECULAR STRUCTURE ON THE PERMEABILITIES OF POLYMIDES. [J]. Acta Polymerica Sinica (2):227-231(1999)
DOI：

ZHANG Junyan, LIU Weimin, XUE Qunji. THE EFFECT OF MOLECULAR STRUCTURE ON THE PERMEABILITIES OF POLYMIDES. [J]. Acta Polymerica Sinica (2):227-231(1999) DOI：

摘要

气体在致密高分子膜中的渗透过程与高分子的链段活动性和自由体积有关

高分子的链段活动性越大

气体的扩散越容易

气体的透过速度越快

高分子自由体积增大

气体的溶解系数增大

扩散速率加快

透气速率上升．因此

为了得到高选择性和高透气性的分离膜

可对其化学结构进行设计合成．对于材料的分子结构与透气性之间关系的研究已有大量报道［１～１１］．１聚酰亚胺膜的制备１１均质膜的制备在装有回流冷凝管和Ｎ２通管?...

Abstract

Two new polymides with aliphatic group were synthesized.The aims are to break through the limit which aromatic polyimide is primarily material as gas separation membrane in polyimide membrane materials

and to look for gas separation membrane materials with good permeability and selectivity.Meantime

the gas permeate behavior of the new polyimides was also discussed.The relationship between permeation and structure of membranes were discussed.A preliminary probe into the mechanism of CO2 and CH4 permeating through polyimide membrane was done.

关键词

聚酰亚胺膜分离ＣＯ２／ＣＨ４

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