Abstract
The effect of the phase angle ψ on fracture toughness and fracture mechanisms of planar interfaces between polystyrene (PS) and poly(2-vinylpyridine) (PVP) reinforced with deuterium-labeled polystyrene (dPS)/PVP block copolymers was investigated using an asymmetric double cantilever beam (ADCB) specimen. The fracture toughness of an interfacial crack, G c , was measured as a function of the phase angle ψ, the areal chain density of the block copolymer Σ, and the degree of polymerization N of the chains. The fracture mechanims of the interface were studied by forward recoil spectrometry (FRES), which permitted the location of the dPS block to be determined after fracture
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