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Polymerization of 4,4′-(hexafluoroisopropylidene)-N,N′-bis(phthaloyl-L-leucine) diacid chloride with aromatic diamines by microwave irradiation

✍ Scribed by Shadpour E. Mallakpour; Abdol-Reza Hajipour; Sepideh Khoee

Publisher
John Wiley and Sons
Year
2000
Tongue
English
Weight
132 KB
Volume
38
Category
Article
ISSN
0887-624X

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✦ Synopsis

A new facile and rapid polycondensation reaction of 4,4Ј-(hexafluoroisopropylidene)-N,NЈ-bis(phthaloyl-L-leucine) diacid chloride (1) with several aromatic diamines, including benzidine (2a), 4,4Ј-diaminodiphenyl methane (2b), 1,5-diaminoanthraquinone (2c), 4,4Ј-sulfonyldianiline (2d), 3,3Ј-diaminobenzophenone (2e), P-phenylenediamine (2f), 2,6-diaminopyridine (2g), 4,4Ј-diaminobenzophenone (2h), 2,4diaminotoluene (2i), and 4,4Ј-diaminodiphenylether (2j), was developed with a domestic microwave oven in the presence of a small amount of a polar organic medium such as o-cresol. The polymerization reactions proceeded rapidly compared to conventional solution polycondensation and finished within 12 min, producing a series of optically active poly(amide-imide)s with quantitative yields and high inherent viscosities of 0.50 -1.93 dL/g. All of the polymers were fully characterized by IR, elemental analyses, and specific rotation. Some structural characterization and physical properties of these optically active poly(amide-imide)s are reported.

📜 SIMILAR VOLUMES

Microwave-assisted and conventional poly
Microwave-assisted and conventional polycondensation reaction of optically active N,N′-(4,4′-sulphonediphthaloyl)-bis-L-leucine diacid chloride with aromatic diamines
✍ Shadpour Mallakpour; Elaheh Kowsari 📂 Article 📅 2004 🏛 John Wiley and Sons 🌐 English ⚖ 137 KB 👁 2 views

## Abstract 3,3′,4,4′‐Diphenylsulfonetetracarboxylic dianhydride (**1**) was reacted with __L__‐leucine (**2**) in acetic acid and the resulting imide‐acid (**3**) was obtained in high yield. The diacid chloride (**4**) was prepared from diacid derivative (**3**) by reaction with thionyl chloride.