Structurally diverse benzoxazines: synthesis, polymerization, and thermal stability
| Autor: | S. Shamim Rishwana, Chinnaswamy Thangavel Vijayakumar, Rajendran Surender, N. David Mathan, S. Alam, S. Vinayagamoorthi |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Bisphenol A
Materials science Polymers and Plastics Bisphenol General Chemical Engineering Indane General Chemistry chemistry.chemical_compound Differential scanning calorimetry chemistry Polymerization Polymer chemistry Materials Chemistry Organic chemistry Thermal stability Glass transition Curing (chemistry) |
| Zdroj: | Designed Monomers and Polymers. 17:47-57 |
| ISSN: | 1568-5551 |
| Popis: | Bisphenol-A is converted to indane bisphenol and spirobiindane bisphenol. The compounds bisphenol-A benzoxazine (BAB), indane bisphenol benzoxazine (IBPB), and spirobiindane bisphenol benzoxazine (SBIB) are prepared by condensing the respective bisphenols with paraformaldehyde and aniline. The structural characterization of the synthesized materials is done by using FTIR, 1H, and 13C NMR. Curing behavior of these benzoxazines and glass transition temperature for polybenzoxazines are studied using differential scanning calorimeter (DSC). The curing exotherm of these benzoxazines is much influenced by the nature of the aromatic unit present in the chosen bisphenol. Compared to the aromatic nucleus in BAB, the indane nucleus present in IBPB shifts the cure exotherm to lower temperatures, whereas the biindane moiety present in SBIB shifts the same to high temperatures. These benzoxazines are thermally cured both at the onset and at the peak maximum of the curing exotherm. The thermal stability of these cured ... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|