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


AKBAS A., AKSOY S.

POLYMER, cilt.35, sa.12, ss.2568-2572, 1994 (SCI İndekslerine Giren Dergi) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 35 Konu: 12
  • Basım Tarihi: 1994
  • Doi Numarası: 10.1016/0032-3861(94)90380-8
  • Dergi Adı: POLYMER
  • Sayfa Sayıları: ss.2568-2572

Özet

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.