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Melt rheological properties of polypropylene–maleated polypropylene blends. II. Dynamic viscoelastic properties

✍ Scribed by Shucai Li; Pentti K. Järvelä; Pirkko A. Järvelä

Publisher
John Wiley and Sons
Year
1999
Tongue
English
Weight
190 KB
Volume
71
Category
Article
ISSN
0021-8995

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✦ Synopsis

The dynamic viscoelastic properties of polypropylene (PP)-maleated PP blends in the molten state have been investigated with a dynamic mechanical thermal analyzer (PL-DMTA MKII) at a frequency range () of 0.6 ‫ء‬ 10 Ϫ1 -3.14 ‫ء‬ 10 2 rad s Ϫ1 . In the study, the blends were prepared by melt-blending in a twin-screw extruder, using homopolypropylene and an ethylene-propylene copolymer as a matrix, respectively, and PP grafted with maleic anhydride (PP-g-MA) as a second component. It has been found that the data of the blends do not obey the Cox-Merz rule; the plots of log GЈ-log GЉ for the both blends show a composition dependence. It is due to the fact that the two kinds of PP are immiscible with PP-g-MA.

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