Synthesis, self-assembly and the effect of the macrocyclic platform on thermal properties of lactic acid oligomer modified by p-tert-butylthiacalix[4]arene
| Autor: | Ivan I. Stoikov, Luidmila S. Yakimova, D. N. Shurpik, Alena A. Vavilova, Vladimir V. Gorbachuk, Alexander V. Gerasimov, Pavel L. Padnya |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Condensation polymer
Infrared spectroscopy 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Oligomer Copolyester Atomic and Molecular Physics and Optics 0104 chemical sciences Electronic Optical and Magnetic Materials Lactic acid Gel permeation chromatography chemistry.chemical_compound chemistry Dynamic light scattering Polymer chemistry Materials Chemistry Thermal stability Physical and Theoretical Chemistry 0210 nano-technology Spectroscopy |
| Zdroj: | Journal of Molecular Liquids. 281:243-251 |
| ISSN: | 0167-7322 |
| DOI: | 10.1016/j.molliq.2019.02.086 |
| Popis: | The interaction of (L)-lactic acid with p-tert-butylthiacalix[4]arene containing ethoxycarbonyl fragments in the 1,3-alternate conformation was studied in tetraglyme. For the first time, the lactic acid oligomer was obtained by polycondensation with the macrocycle and characterized by 1H, 13C NMR, IR spectroscopy, MALDI mass spectrometry and gel permeation chromatography. Thermal stability of the obtained copolyester of lactic acid and thiacalix[4]arene was studied by TG/DSC analysis and the effect of the macrocyclic platform on its thermal properties was shown. Copolyester obtained was thermally more stable than oligolactic acid. Self-assembly of synthesized oligomer was studied by dynamic light scattering method. It was shown that monodisperse particles (PDI = 0.13) with the size of 208 ± 4 nm are formed in CH3CN solution at 2.5 × 10−5 M concentration. |
| Databáze: | OpenAIRE |
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