Polyrotaxanes composed of β-cyclodextrin and polydimethylsiloxanes: synthesis, morphology and thermal behavior
| Autor: | Bogdan C. Simionescu, Maria Perminova, G. N. Gubanova, Tatiana Sukhanova, Mariana Pinteala, Narcisa Marangoci, Alain Perichaud, Valeria Harabagiu, Sergei Bronnikov, Anatolii Grigoryev, Aurica Farcas |
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| Rok vydání: | 2007 |
| Předmět: |
chemistry.chemical_classification
Thermogravimetric analysis Morphology (linguistics) Materials science Polymers and Plastics Cyclodextrin Scanning electron microscope Organic Chemistry Substituent chemistry.chemical_compound Differential scanning calorimetry chemistry Siloxane Thermal Polymer chemistry Materials Chemistry |
| Zdroj: | High Performance Polymers. 20:251-266 |
| ISSN: | 1361-6412 0954-0083 |
| Popis: | Epoxy-terminated polydimethylsiloxanes (E-PDMSs) of different molecular weight Mn were proved to undergo inclusion complexation into the inner cavity of β-cyclodextrin (β-CD), resulting in polyrotaxanes (PRots). The dethreading of the macrocycle was prevented by blocking the siloxane chain with a bulky substituent derived from 4-aminophenyltriphenyl methane (APhTPhM). As revealed by thermogravimetric analysis, differential scanning calorimetry, scanning electron microscopy (SEM), wide-angle X-ray diffraction and statistical analysis of SEM images, the thermal properties and the morphology of polyrotoxanes are dependent upon Mn, β-CD/E-PDMS molar ratio and the presence of free β-CD in the complexes. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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