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- Title
Phase inversion detection in immiscible binary polymer blends via zero‐shear viscosity measurements.
- Authors
Versteeg, Frederique A.; Mukherjee, Adrivit; Picchioni, Francesco; Parisi, Daniele
- Abstract
In the present work, we demonstrate that zero‐shear viscosity is a sensitive rheological function to detect phase inversion in immiscible binary polymer blends characterized by a viscosity ratio larger than one. The phase inversion of poly(propylene) (PP)/low‐density poly(ethylene) (LDPE) and poly(styrene) (PS)/LDPE, at various compositions, was assessed via our novel approach. For both blends, three distinctive regions could be determined through zero‐shear viscosity measurements; the LDPE matrix, the co‐continuous phase, and the PS or PP matrix. For PP/LDPE blends, the co‐continuous structure was between 50 and 75 wt.% PP, and for PS/LDPE blends the co‐continuous structure was between 45 and 75 wt.% PS, in agreement with scanning electron microscopy analysis, empirical model predictions, and literature data. Highlights: Phase inversion revealed via viscosity measurements.Limitations of linear viscoelastic models for immiscible blends assessed.
- Subjects
MEASUREMENT of viscosity; POLYMER blends; SCANNING electron microscopy; VISCOSITY
- Publication
Polymer Engineering & Science, 2024, Vol 64, Issue 7, p3160
- ISSN
0032-3888
- Publication type
Article
- DOI
10.1002/pen.26757