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Application of FT Rheology to Industrial Linear and Branched Polyethylene Blends

โœ Scribed by Iakovos Vittorias; Manfred Wilhelm

Publisher
John Wiley and Sons
Year
2007
Tongue
English
Weight
320 KB
Volume
292
Category
Article
ISSN
1438-7492

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โœฆ Synopsis

Abstract

Numerous analytical techniques are used to quantify branching topologies in polyethylene. One of these methods, FT rheology, studies the higher harmonic contributions of the stress response to large amplitude oscillatory shear deformation. The sensitivity of FT rheology in the presence of sparse longโ€chain branched chains blended with linear ones is addressed. FT rheology is sensitive even for small concentrations of a partly longโ€chain branched component blended with a linear melt (1.5โ€“5 wt.โ€%). The nonโ€linear parameters present a strong dependence on the fraction of longโ€chain branched species in a polydisperse melt, the miscibility of which is confirmed via rheological techniques.

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๐Ÿ“œ SIMILAR VOLUMES

Predicting the rheology of linear with b
Predicting the rheology of linear with branched polyethylene blends
โœ David J. Groves; Tom C. B. McLeish; Ramesh K. Chohan; Philip D. Coates ๐Ÿ“‚ Article ๐Ÿ“… 1996 ๐Ÿ› Springer-Verlag ๐ŸŒ English โš– 971 KB

A series of melt blended commercial linear and branched polyethylenes are used to explore the generality of blending laws. The measured relaxation modulus G(t), and zero shear viscosity J/0, for each blend and blend fraction, have been compared with prediction for miscible blends, particularly using