✦ LIBER ✦

Equilibrium of one-pot polymerization of polyimide

✍ Scribed by Hiroshi Inoue; Yoshikazu Sasaki; Toshio Ogawa

Publisher: John Wiley and Sons
Year: 1996
Tongue: English
Weight: 461 KB
Volume: 60
Category: Article
ISSN: 0021-8995
DOI: 10.1002/(sici)1097-4628(19960411)60:2<201::aid-app7>3.0.co;2-w

No coin nor oath required. For personal study only.

✦ Synopsis

One

-pot polymerization of polyimide from 3,3',4,4'-biphenyl tetracarboxylic dianhydride (BPDA) and 4,4'-oxydianiline (ODA) was examined. The equilibrium in the polyimide with water was examined in detail in p-chlorophenol solution during the polymerization. The equilibrium constant was expressed by log K = 1.50 + 1433 (l/T). The polymerization reaction is exothermic. The molecular weight increased with decrease of temperature.

📜 SIMILAR VOLUMES

First observation of equilibrium polymer

First observation of equilibrium polymerization of cyclic sulfite

✍ Natsuhiro Azuma; Fumio Sanda; Toshikazu Takata; Takeshi Endo 📂 Article 📅 1997 🏛 John Wiley and Sons 🌐 English ⚖ 170 KB 👁 1 views

Cationic polymerization of a seven-membered cyclic sulfite ( 7CS) was carried out with methyl trifluoromethanesulfonate as a catalyst in chlorobenzene. The final conversions of 7CS were 22, 41, 52, and 60% in the polymerizations at 25ЊC with the initial monomer concentrations of 3, 4, 5, and 6 M, re

One-pot synthesis of dendritic polyamide

✍ Yoshitaka Yamakawa; Mitsuru Ueda; Kazuhiko Takeuchi; Michihiko Asai 📂 Article 📅 1999 🏛 John Wiley and Sons 🌐 English ⚖ 211 KB 👁 2 views

Dendritic polyamides with polydispersity of 1.1-1.4 have been successfully prepared from trimesic acid, 5-aminoisophthalic acid, and 4-aminophenylpropionic acid as a core molecule, a dendron, and a spacer unit, respectively, with a one-pot procedure. This procedure involves successive activation of

Iterative One-Pot Synthesis of Oligosacc

Iterative One-Pot Synthesis of Oligosaccharides

✍ Xuefei Huang; Lijun Huang; Haisheng Wang; Xin-Shan Ye 📂 Article 📅 2004 🏛 John Wiley and Sons 🌐 English ⚖ 233 KB

Iterative One-Pot Synthesis of Oligosacc

Iterative One-Pot Synthesis of Oligosaccharides

✍ Xuefei Huang; Lijun Huang; Haisheng Wang; Xin-Shan Ye 📂 Article 📅 2004 🏛 John Wiley and Sons 🌐 English ⚖ 232 KB 👁 2 views

One-Pot Syntheses of α-Ferrocenylalkylam

One-Pot Syntheses of α-Ferrocenylalkylamines

✍ Dipl.-Chem. Rudolf Herrmann; Prof. Dr. Ivar Ugi 📂 Article 📅 1979 🏛 John Wiley and Sons 🌐 English ⚖ 184 KB 👁 1 views

One-Pot Synthesis of Substituted Semibul

One-Pot Synthesis of Substituted Semibullvalenes

✍ Dörte Paske; Richard Ringshandl; Ingeborg Sellner; Dipl.-Chem. Heinz Sichert; Pr 📂 Article 📅 1980 🏛 John Wiley and Sons 🌐 English ⚖ 240 KB 👁 2 views