期刊
POLYMER JOURNAL
卷 39, 期 11, 页码 1185-1192出版社
SOC POLYMER SCIENCE JAPAN
DOI: 10.1295/polymj.PJ2007061
关键词
Polyester; Optically Active Polymers; TsCl; Py; DMF Condensing Agent; Thermal Properties; Solubility; Direct Polycondensation
资金
- Research Affairs Division Isfahan University of Technology (IUT)
- Center of Excellency in Sensors and Green Chemistry Research (IUT)
A new aromatic diacid monomer containing pendent L-alaninephthalimide group was synthesized in three steps in high yield and purity. Several new, highly soluble and optically active aromatic polyesters containing phthalimide and flexible chiral groups were prepared with moderate molecular weights by direct polycondensation with tosyl chloride (TsCl), pyridine (Py) and N,N-dimethylformamide (DMF) as condensing agent. The aim of this work was to obtain novel optically active polyesters that were more soluble in common organic solvents while maintaining the high thermal stability. All polymers derived from such a diacid and aromatic diols were highly organosoluble in the solvents like N-methyl-2-pyrrolidinone, N,N-dimethylacetamide, DMF, Py and dimethyl sulfoxide. These flew optically active polyesters with inherent viscosities ranging from 0.21 to 0.81 dL/g were obtained with high yields. Thermogravimetric analysis (TGA) data showed that these polyesters are thermal stable, with 10% weight loss being recorded above 370 degrees C. Some of the above polymers, were characterized by (1)H-NMR, FT-IR, elemental analyses and specific rotation techniques. [doi:10.1295/polymj.PJ2007061]
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