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Poly(ester amide)s derived from <SC>L</SC>-tartaric acid and amino alcohols. II. Aregic polymers
- Source :
- Journal of Polymer Science Part A: Polymer Chemistry; 1 August 2000, Vol. 38 Issue: 15 p2687-2696, 10p
- Publication Year :
- 2000
-
Abstract
- A series of aregic poly(ester amide)s (a-PEAT6) with ester/amide ratios (a : b) varying from 1 : 19 to 1 : 2 were prepared with <SC>L</SC>-tartaric acid, 6-aminohexanol, and 1,6 hexanediamine as the starting materials. Polycondensation in a solution of the diamine with mixtures of pentachlorophenyl-activated di-O-methyl-<SC>L</SC>-tartaric and 6-aminohexyl-di-O-methyl-<SC>L</SC>-tartaric acids led to a-PEAT6(a : b), with the a : b ratio determined by the composition of the feed. The newly synthesized poly(ester amide)s were characterized by elemental analysis, size exclusion chromatography, and IR and NMR spectroscopy. They had number-average molecular weights between 25,000 and 45,000 and were highly crystalline, showing melting temperatures ranging from 100 to 230 °C and glass-transition temperatures oscillating between 50 and 100 °C. The thermal degradation of a-PEAT6(a : b) began above 200 °C and concluded with a final weight loss between 60 and 90% of the initial mass. The process evolved with the formation of cyclic tartarimide units and extensive main-chain scissions. The degradation mechanism is discussed in relation to the chemical composition and microstructure of the polymers. © 2000 John Wiley & Sons, Inc. J Polym Sci A: Polym Chem 38: 26872696, 2000
Details
- Language :
- English
- ISSN :
- 0887624X and 10990518
- Volume :
- 38
- Issue :
- 15
- Database :
- Supplemental Index
- Journal :
- Journal of Polymer Science Part A: Polymer Chemistry
- Publication Type :
- Periodical
- Accession number :
- ejs1795428
- Full Text :
- https://doi.org/10.1002/1099-0518(20000801)38:15<2687::AID-POLA80>3.0.CO;2-Q