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Keywords:

  • blends;
  • crack initiation;
  • crack propagation;
  • fracture;
  • fracture toughness;
  • mechanical properties;
  • poly(methyl methacrylate);
  • poly(vinylidene fluoride)

Abstract

The fracture behavior of blends of poly(vinylidene fluoride) and poly(methyl methacrylate) was investigated all over the composition range. A detailed analysis of the net stress versus crack opening displacement curves was performed. Fracture surface observations allowed statements on the process zone characteristics ahead of the crack tip. For the amorphous blends, the crack initiation energy is well related to the glass transition temperature. For the semicrystalline blends, the fracture energy is correlated with the degree of crystallinity. © 2012 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys, 2012