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- W2038863744 abstract "The tensile and fracture behaviour of neat α and β nucleated isotactic polypropylene and rubber-modified α and β nucleated isotactic polypropylene has been investigated at test speeds of 0.0001–10 ms−1 in the temperature range −30 to +60 °C. The presence of the β phase had little effect at low temperature. However, at +25 and +60 °C, it increased the speeds corresponding to the ductile–brittle transition in the neat polymer by more than three decades. This behaviour has been linked to changes in microdeformation mechanisms observed at the lamellar and spherulitic level, an increase in cavitational deformation in tensile tests and an increase in the strength of the β relaxation in dynamic mechanical spectra. In the blends, the presence of the β phase led to somewhat higher energy dissipation in regimes of ductile fracture. However, the ductile–brittle transitions were not significantly affected. The modifier phase was therefore inferred to control the initiation and propagation of the plastic zone ahead of the crack tip during fracture." @default.
- W2038863744 created "2016-06-24" @default.
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- W2038863744 date "2002-05-01" @default.
- W2038863744 modified "2023-10-14" @default.
- W2038863744 title "Influence of β nucleation on the mechanical properties of isotactic polypropylene and rubber modified isotactic polypropylene" @default.
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- W2038863744 doi "https://doi.org/10.1016/s0032-3861(02)00135-0" @default.
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