Fracture characteristics of high impact polystyrene under impact fatigue loadings


YILMAZ T. , ŞAHİN T. , SINMAZÇELİK T.

JOURNAL OF MATERIALS SCIENCE, cilt.44, ss.4308-4314, 2009 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 44 Konu: 16
  • Basım Tarihi: 2009
  • Doi Numarası: 10.1007/s10853-009-3640-3
  • Dergi Adı: JOURNAL OF MATERIALS SCIENCE
  • Sayfa Sayıları: ss.4308-4314

Özet

This study analyses the impact properties of high impact polystyrene (HIPS). HIPS is one of the well-known toughened polymers. The high toughness is given by the rubbery phase. The impact fatigue behavior of HIPS was studied with a Ceast pendulum type tester (Resil 25). The fracture mechanisms were examined with a scanning electron microscopy. The nature of crack initiation and propagation was investigated for small impact angles and three different spans. The impact angles of charpy hammer were chosen as 5A degrees, 10A degrees, 15A degrees, 20A degrees, and 25A degrees. The fracture characteristics varied with the impact angle, the number of impacts, and the distance between supports. The rate of crack propagation was high at higher impact angles with lower endurance, and low at lower impact angles with higher endurance.