Synthesis and Characterization of Polyimides Prepared from Optically Active (R,R) and (S,S)-1,3-bis(p-N,N
- dimethylaminobenzyl)-perhydrobenzimidazol-2-thion

Authors : Murat YİĞİT, Turgay SEÇKİN

Pages : 113-124

View : 17 | Download : 5

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :This paper presents the synthesis and characterization of polyimides containing a chiral insert ignore into journalissuearticles values(R,R); or insert ignore into journalissuearticles values(S,S); 1,3-bisinsert ignore into journalissuearticles values(p-N,N´-dimethylaminobenzyl);-perhydrobenzimidazol-2-thion unit in the backbone. The reactions occur between equimolar amounts of a dianhydride and an aromatic dimethylamine in the presence of the solvent N-methyl-2-pyrollidone insert ignore into journalissuearticles values(NMP);. In this work, the chiral monomer RR and SS -1,3-bisinsert ignore into journalissuearticles values(p-N,N´-dimethylaminobenzyl);-perhydrobenzimidazol- 2-thion were used as diamines. The polyimides obtained were characterized by thermogravimetry insert ignore into journalissuearticles values(TGA);, differential thermal analysis insert ignore into journalissuearticles values(DTA);, differential scanning calorimeter insert ignore into journalissuearticles values(DSC);, infrared spectroscopy insert ignore into journalissuearticles values(FT-IR);, and gel permeation chromatography insert ignore into journalissuearticles values(GPC);. It was found that the composition of the polymer had a significant effect upon the thermal behavior of the material.
Keywords : Polyimides, thermally stable polymers, dianhydride, optically active polymers