Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5182847 | Polymer | 2012 | 5 Pages |
An additional damping transition at â25 °C, which has never been reported in blended system, is observed in dynamic mechanical spectra (DMS) of isotactic polypropylene/ethylene 1-octene copolymer (iPP/POE) composites with alternating multilayered structure. With increasing layer number, this additional transition becomes larger followed by the decrease of the damping peak of iPP. Through mechanical analysis, the maximum of interfacial stress is found at â25 °C, where the new damping peak appears coincidentally. Hence, the origin of the additional transition is ascribed to the advanced defreezing of chain segments of iPP for balancing difference of the mechanical response between adjacent layers.
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