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Pervaporation of water/acetic acid through polyimide membranes from 3,3′, 4,4′-benzophenone tetracarboxylic dianhydride and 4,4′-oxydianiline

✍ Scribed by Yoon Duk Moon; Boo Keun Oh; Young Moo Lee

Publisher
Springer
Year
1992
Tongue
English
Weight
406 KB
Volume
29
Category
Article
ISSN
0170-0839

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Preparation and characterization of 3,3′,4,4′-benzophenone tetracarboxylic dianhydride-pyromellitic diahydride alternating polyimides
✍ Yu Yang; Xujie Yang; Zhengliang Zhi; Lude Lu; Xin Wang 📂 Article 📅 1997 🏛 John Wiley and Sons 🌐 English ⚖ 183 KB 👁 2 views

Four kinds of 3,3 ,4,4-benzophenone tetracarboxylic dianhydride (BTDA) -pyromelliitic dianhydride (PMDA) alternating polyimide (BTDA-PMDA API) were obtained by reacting 1 mol BTDA with 2 mol diamines to form BTDA chainextended diamines (BTDA CED), followed by the addition of 1 mol PMDA to yield the