摘要: The fracture properties and microdeformation behaviour their correlation with structure in commercial bulk polyolefins are reviewed. Emphasis is on crack-tip deformation mechanisms regimes of direct practical interest, namely slow crack growth polyethylene high-speed ductilebrittle transitions isotactic polypropylene. Recent studies reaction-bonded interfaces also briefly considered, these representing promising model systems for the investigation relationship between fundamental molecular structure.Polyethylene Polypropylene Microdeformation Fracture Slow