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Synthesis and characterization of aluminosilicate MCM-22 in basic media in the presence of fluoride salts

✍ Scribed by R Aiello; F Crea; F Testa; G Demortier; P Lentz; M Wiame; J.B Nagy


Publisher
Elsevier Science
Year
2000
Tongue
English
Weight
557 KB
Volume
35-36
Category
Article
ISSN
1387-1811

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✍ Jong-Young Jeon; Tae-Moon Tak πŸ“‚ Article πŸ“… 1996 πŸ› John Wiley and Sons 🌐 English βš– 961 KB

Polyimide precursors and polyamic acid were synthesized by direct polycondensation reaction of the 1,2,3,4-butanetetracarboxylic acid (BTCA) and diamines in the presence of metal salts and phosphorous compounds. The BTCA was reacted with an initiating species, which is the phosphonium salt of metal