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A Study of the Ionic Liquid Mediated Microwave Heating for the Synthesis of New Thermally Stable and Optically Active Aromatic Polyamides under Green Procedure
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  • A Study of the Ionic Liquid Mediated Microwave Heating for the Synthesis of New Thermally Stable and Optically Active Aromatic Polyamides under Green Procedure
  • A Study of the Ionic Liquid Mediated Microwave Heating for the Synthesis of New Thermally Stable and Optically Active Aromatic Polyamides under Green Procedure
저자명
Mallakpour. Shadpour,Dinari. Mohammad
간행물명
Macromolecular research
권/호정보
2010년|18권 2호|pp.129-136 (8 pages)
발행정보
한국고분자학회
파일정보
정기간행물|ENG|
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이 논문은 한국과학기술정보연구원과 논문 연계를 통해 무료로 제공되는 원문입니다.
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기타언어초록

Ionic liquids (ILs) of the 1,3-dialkylimidazolium-type have great potential for the innovative application of microwaves in synthesis and separation. The use of ILs as reagents in conjunction with microwave heating makes it possible to prepare new organsoluble optically active aromatic polyamides (PAs) by a direct polycondensation reaction of our synthesized dicarboxylic acid: (2S)-4-[(4-methyl-2-phthalimidylpentanoylamino)benzoylamino]isophthalic acid (9), with several aromatic diamines. The polymerization reactions provided chiral PAs in high yield and inherent viscosities in the range of 0.43-0.85 $dLg^{-1}$. The chemical structures of some of these samples as representatives were characterized by $^1H$ NMR and elemental analysis. All polymers were characterized by FTIR and specific rotation tools. Their thermal properties were determined by differential scanning calorimetry and thermogravimetric analysis. The efficiency of microwave irradiation conjugated with ILs was compared with that of the polycondensation of this monomer in ILs using conventional heating. The results showed that much shorter reaction times, higher yields and inherent viscosities were obtained under microwave assisted conditions. Furthermore, the use of ILs as a media and catalyst for the above polymerization reactions will eliminate the need of volatile and toxic solvents and reagents as condensing agents and provide a environmentally benign process.