Synthesis and characterization of calcium-containing poly(urethane-urea)s
โ Scribed by R. Jayakumar; Y.-S. Lee; S. Nanjundan
- Publisher
- John Wiley and Sons
- Year
- 2003
- Tongue
- English
- Weight
- 161 KB
- Volume
- 90
- Category
- Article
- ISSN
- 0021-8995
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Poly(urethane-urea)s (PUUs) from 2,4-tolylene diisocyanate (2,4-TDI), poly(oxytetramethylene)diols (PTMO) or poly(butylene adipate)diol (PBA), and various diamines were synthesized and characterized by Fourier transform infrared spectroscopy, gel permeation chromatography, differential scanning calo
## Abstract Two diamines, 2,6โbis(4โaminophenoxy)pyridine and 2,6โbis(5โaminoโ1โnaphenoxy)pyridine, were prepared through the nucleophilic aromatic substitution reaction of 4โaminophenol and 5โaminoโ1โnaphthol, respectively, with 2,6โdichloropyridine. Poly(ether urea)s were synthesized through the