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RESEARCH PRODUCT
Supramolecular Thermotropic Liquid Crystalline Materials with Nematic Mesophase Based on Methylated Hyperbranched Polyethylenimine and Mesogenic Carboxylic Acid
Yu ChenYu ChenSalah-eddine StiribaZhong ShenHolger FreyLionel Gehringersubject
chemistry.chemical_classificationPolyethylenimineMaterials sciencePolymers and PlasticsMesogenCarboxylic acidOrganic Chemistrytechnology industry and agricultureSupramolecular chemistryMesophasemacromolecular substancesThermotropic crystalchemistry.chemical_compoundchemistryLiquid crystalPolymer chemistryMaterials ChemistryCarboxylatedescription
Supramolecular interaction of fully methylated hyperbranched polyethylenimines (PEI) with a mesogen-based carboxylic acid, 5-(p-cyanobiphenoxy)pentanoic acid, results in the formation of supramolecular complexes exhibiting thermotropic liquid crystalline (LC) mesophases. In contrast to the common smectic mesophases of most dendritic LC polymers, nematic LC phase were observed. The complexation of PEI and the mesogen units is due to electrostatic interaction between the carboxylate groups and the ammonium end groups of PEI. LC properties were investigated by a combination of differential scanning calorimetry, polarizing light optical microscopy, and X-ray diffractometry.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2006-01-03 | Macromolecular Rapid Communications |