EFFECTS OF THERMAL AGING ON THE PROPERTIES AND LIFETIME PREDICTION OF HYDROXYL-TERMINATED POLYBUTADIENE


AKBAS A., AKSOY S.

POLYMER, vol.35, no.12, pp.2568-2572, 1994 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 35 Issue: 12
  • Publication Date: 1994
  • Doi Number: 10.1016/0032-3861(94)90380-8
  • Title of Journal : POLYMER
  • Page Numbers: pp.2568-2572
  • Keywords: POLYBUTADIENE, HYDROXYL TERMINATION, THERMAL AGING, PROPELLANT, KINETICS, BINDERS, CTPB

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.