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Abstract
Within this research, microwave-assisted preparation of chiral nanostructured poly(amide-imide)s (PAI)s, from 5-(2-benzimidazole)-1,3-phenylenediamine (VIII) and various optically active and environmentally friendly diacids, such as N-trimellitylimido-S-valine (IVa), N-trimellitylimido-L-leucine (IVb), N-trimellitylimido-L-alanine (IVc) and N-trimellitylimido-L-isoleucine (IVd) via implementation of molten salt ionic liquid and triphenyl phosphite as an activating media, are demonstrated. The morphology study of the aforementioned polymers shows that these polymers are nanostructured particles and thus are good candidates as carriers for biomedical applications. The sonication of these polymer samples created smaller sizes of the polymer nanoparticles.
ACKNOWLEDGMENTS
We wish to express our gratitude to the Research Affairs Division of Isfahan University of Technology (IUT), Isfahan, for partial financial support. Further financial support from Iran nanotechnology Initiative Council (INIC), National Elite Foundation (NEF) and Center of Excellence in Sensors and Green Chemistry Research (IUT) are gratefully acknowledged.
Notes
A: MW heating.
1: Measured at a concentration of 0.5 g/dL in DMF.
2: Measured under the same conditions as inherent viscosity.
A′: 12 h 120°C.
1: Measured at a concentration of 0.5 g/dL in DMF.
2: Measured under the same conditions as inherent viscosity.
a Temperature at which 5% weight loss was recorded by TGA at heating rate of 20°C/min under a N2 atmosphere.
b Temperature at which 10% weight loss was recorded by TGA at heating rate of 20°C/min under a nitrogen atmosphere.
c weight percentage of material left undecomposed after TGA analysis at a temperature of 800°C under a nitrogen atmosphere.
d Limiting oxygen index (LOI) evaluated char yield at 800°C.