Adjustable crystalline stereocomplexes from enantiopure gradient polycarbonates
| Autor: | Ke-Ke He, Ye Liu, Rong-Rong Li, Xiao-Bing Lu, Wei-Min Ren |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
chemistry.chemical_classification
Materials science 02 engineering and technology General Chemistry Polymer 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences chemistry.chemical_compound Crystallinity Enantiopure drug chemistry visual_art Tacticity Polymer chemistry visual_art.visual_art_medium Copolymer Cyclopentene Thermal stability Polycarbonate 0210 nano-technology |
| Zdroj: | Science China Chemistry. 59:1415-1420 |
| ISSN: | 1869-1870 1674-7291 |
| DOI: | 10.1007/s11426-016-0212-1 |
| Popis: | Stereoselective interaction was observed in the mixture of enantiopure gradient polycarbonate (denoted as PCOPC-g-PCPC, originated from the enantioselective terpolymerization of CO2, 3,4-epoxytetrahydrofuran (COPO) and cyclopentene oxide (CPO)) and various isotactic polycarbonates with opposite configuration in chloroform solution. The resultant crystalline stereocomplexes exhibit enhanced thermal stability and new crystalline behaviors, significantly distinct from their parent polymers. It was found that the cocrystallization selectively occurred between (R)-PCOPC (CO2/COPO copolymer) and (S)-PCOPC-enriched segment in the gradient terpolymer (S)-PCOPC-g-PCPC, while (R)-PCPC (CO2/CPO copolymer) selectively complexed with (S)-PCPC-enriched segment. No stereocomplexation was observed between (S)-PCOPC-g-PCPC and (S)-PCOPC or (S)-PCPC. This study is beneficial to finding new routes to prepare various semicrystalline materials having a wide variety of physical properties and degradability. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink