Poly(1,3,4-oxadiazole-amide-ester)s and Thin Films Made from Them
| Autor: | Péter Müller, Maria Bruma, Márta Szesztay, Ion Sava |
|---|---|
| Rok vydání: | 2005 |
| Předmět: |
Materials science
Polycondensation reaction Polymers and Plastics Organic Chemistry Oxadiazole 02 engineering and technology 021001 nanoscience & nanotechnology chemistry.chemical_compound 020401 chemical engineering chemistry Amide Polymer chemistry Materials Chemistry Thermal stability 0204 chemical engineering Thin film Composite material 0210 nano-technology |
| Zdroj: | High Performance Polymers. 17:263-275 |
| ISSN: | 1361-6412 0954-0083 |
| DOI: | 10.1177/0954008305045689 |
| Popis: | Aromatic poly(1,3,4-oxadiazole-amide-ester)s were prepared by polycondensation reaction of diacid chlorides containing preformed ester groups with aromatic diamines containing 1,3,4-oxadiazole units. These polymers were easily soluble in N-methylpyrrolidinone and were cast into flexible films from such solutions. The polymers showed high thermal stability with initial decomposition temperature being above 365 °C and glass transition temperature in the range of 215–260 °C. The weight average molecular weight was in the range of 91 000–257 000 and polydispersity is in the range of 1.64–5. The polymer films showed good mechanical properties with tensile strength in the range of 40–91 MPa, elastic modulus in the range of 2.22–3.98 GPa and elongation at break in the range of 1.85–7.37%. |
| Databáze: | OpenAIRE |
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