EFFECTS OF THERMAL AGING ON THE PROPERTIES AND LIFETIME PREDICTION OF HYDROXYL-TERMINATED POLYBUTADIENE
POLYMER, vol.35, no.12, pp.2568-2572, 1994 (SCI-Expanded, Scopus)
- Publication Type: Article / Article
- Volume: 35 Issue: 12
- Publication Date: 1994
- Doi Number: 10.1016/0032-3861(94)90380-8
- Journal Name: POLYMER
- Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Page Numbers: pp.2568-2572
- Keywords: POLYBUTADIENE, HYDROXYL TERMINATION, THERMAL AGING, PROPELLANT, KINETICS, BINDERS, CTPB
- Middle East Technical University Affiliated: No
Abstract
Thermal ageing of hydroxyl-terminated polybutadiene propellant binders was carried out at various temperatures between 50 and 100-degrees-C. The changes caused by this treatment in properties such as melt viscosity, functional end-groups, molecular weight, tensile strength, elastic modulus and ultimate elongation were examined. The viscosity and average molecular weight increased with the ageing temperature and ageing period. A decrease in ultimate elongation and an increase in elastic modulus were observed. Tensile strength of the matrices prepared by curing hydroxyl-terminated polybutadiene with isophorone diisocyanate did not change. Lifetime for usability was predicted from the application of the Arrhenius equation to be 7 years.