Synthesis and characterization of polyimides prepared from optically active (R,R) and (S,S)-1,3-bis(p-N,N '-dimethylaminobenzyl)-perhydrobenzimidazol-2-thion

YIGIT M., Seckin T., Koytepe S., CETINKAYA E.

TURKISH JOURNAL OF CHEMISTRY, vol.31, no.2, pp.113-124, 2007 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 31 Issue: 2
  • Publication Date: 2007
  • Journal Name: TURKISH JOURNAL OF CHEMISTRY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, TR DİZİN (ULAKBİM)
  • Page Numbers: pp.113-124
  • Keywords: polimides, thermally stable polymers, dianhydride, optically active polymers, CHIRAL POLYMERS, SOLUBLE POLYIMIDES, DIANHYDRIDE, UNIT, POLYAMIDES, DIAMINES
  • Inonu University Affiliated: Yes

Abstract

This paper presents the synthesis and characterization of polyimides containing a chiral (R, R) or (S,S) 1,3-bis(p - N,N'-dimetylaminobenzyl)-perhydrobenzimidazol-2-thion unit in the backbone. The reactions occur betweem equimolar amounts of a dianhydride and all aromatic dimethylamine. in the presence of the solvent N-methyl-2-pyrollidone (NMP). In this work, the chiral monomer RR and SS -1,3-bis(p - N,N'-dimethylaminobenzyl)-perhydrobenzimidazol-2-thion were used as diamines. The polyimides obtained were characterized bu thermogravimetry (TGA), differential thermal analysis (DTA), differential scanning calorimeter (DSC), infrared spectroscopy (FT-IR) and gel permeation chromatography (GPC). It was found that the composition of the polymer had a significant effect upon the thermal behavior of the material.