Accelerated Aging and Characterization of a Plasticized Poly(Ester Urethane) Binder
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
This chapter describes two accelerated aging studies emphasizing either oxidative degradation or hydrolytic degradation of a plasticized commercial poly(ester urethane) (Estane® 5703). The aging conditions result in dominance of one of the degradation mechanisms over the other. The oxidative degradation study is focused on the kinetics of the oxidation of the hard segments and its impact on mechanical properties. The hydrolytic degradation study is focused on chain scission reactions of the polyester soft segments. These properties have been modeled for different aging humidities using a lifetime prediction hydrolysis model. Both studies evaluate degradation by 1H NMR and GPC molecular weight analysis. 1H NMR spin-spin relaxation times have been evaluated for hydrolytic degradation of Estane indicating that hydrolyzed Estane shows greater chain mobility.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA)
- DOE Contract Number:
- AC52-06NA25396
- OSTI ID:
- 1074589
- Report Number(s):
- LA-UR--07-6074
- Country of Publication:
- United States
- Language:
- English
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