Melt fracture of polystyrene Journal Articles uri icon

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abstract

  • AbstractThe results of an experimental study of melt fracture using polystyrene samples of narrow and broad molecular weight distribution are presented. The weight average molecular weight (M̄w) ranged from 9.72 × 104 to 1.80 × 106 and the distribution breadth M̄w/M̄η from 1.06 to 9.21. The critical shear stress varies linearly with 1/M̄w, increases slightly with temperature and is independent of the distribution of molecular weights. This type of behavior is satisfactorily explained in terms of Graessley's entanglement theory.

publication date

  • January 1971