A comparison between apparent viscosity and dynamic complex viscosity for polypropylene/maleated polypropylene blends

Li Scucai, Pentti Järvelä (Corresponding Author), Pirkko Järvelä

Research output: Contribution to journalArticleScientificpeer-review

19 Citations (Scopus)

Abstract

Apparent shear and dynamic complex viscosity measurements at 200°C and 230°C, for a series of blends of a homopolypropylene (PPVC) with maleic anhydride polypropylene (PP‐g‐MA) and blends of an ethylene‐propylene copolymer (PPSC) with PP‐g‐MA, are reported. The data were taken using a capillary rheometer and a dynamic mechanical thermal analyzer. The results are analyzed in terms of the Cox‐Merz rule. Data taken at 230°C for both matrices (viz. PPVC and PPSC) follow the Cox‐Merz rule. However, deviations are noted in the blends, especially in compositions wherein PP‐g‐MA content is above 10 wt%. Cross phase separation and charges in the dispersed phase size (of PP‐g‐MA) in the two types of measurement appear to be the cause of the failure of the Cox‐Merz rule.

Original languageEnglish
Pages (from-to)18-23
JournalPolymer Engineering and Science
Volume37
Issue number1
DOIs
Publication statusPublished - 1997
MoE publication typeA1 Journal article-refereed

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