Microwave heating in conjunction with ionic liquid as a novel method for the fast synthesis of optically active poly(amide-imide)s derived from N,N'-(4,4'-hexafluoroisopropylidenediphthaloyl)-bis-L-methionine and various aromatic diamines

作者：Mallakpour Shadpour^*; Kowsari Elaheh

来源：Iranian Polymer Journal, 2006, 15(3): 239-247.

• poly(amide-imide)s
• microwave-assisted
• optically active polymers
• direct polycondensation
• ionic liquid (IL)

Ionic liquids (IL)s are a new class of solvents which have interesting properties such as nonvolatility, high ionic concentration, good thermal stability, nonflammability and can dissolve most of organic as well as inorganic materials. Recently ILs are attracting more attention due to their significant role in controlling the reaction as a catalyst. It is important that ILs are the chemicals that can be applied as solvents and catalysts in green chemistry processes. In this investigation high molecular weight and optically active poly(amide-imide)s (PAIs) have been synthesized and their properties such as optical activity, solubility, thermal stability were studied. Polymers were synthesized by direct polymerization of N,N'-(4,4'-hexafluoroisopropylidenediphthaloyl)-bis-L-methionine and various aromatic diamines in the presence of triphenyl phosphite by a new microwave-assisted ionic liquid (MAIL) method. The compounds obtained were characterized by elemental C, H and N analysis, solubility, FTIR, (1)H NMR. Thermogravimetric curves were also recorded. All data agree with the proposed structures.

• 出版日期2006-3