he microstructural changes in highly oriented films of blends Of high densitypolyethylene(HDPE ) with ultra-high moledar weight polyethylene(UHMWPE) during deformahon process have ho investigated by TEM andSAXS methods.A sacal melt- drawn teChnique was ed to pmpare the orientedfilms with shish-kebab morphology. The films were triakially stretched alongchain direction at various temperature' It has ho found that the deformahontemperature has an impotant effeCt on the ndcrostfUCtllre changes of theshish- kebab during the stretching processes. At room temperature

the lamellae be-tween fibris undergo crystal shear and chain slip

readucing lamellae width and increasing fibrilslength between alsmella. At elevated temerature (115℃)

stressed kebabs decrystallize and transform into fibrils. It results from the strain in-duced crystallization.