Melt Rheological Behavior and Morphology of Poly(ethylene oxide)/Natural Rubber- graft -Poly(methyl methacrylate) Blends

The influence of morphology on the rheological properties of poly(ethylene oxide) (PEO) and natural rubber- -poly(methyl methacrylate) (NR- -PMMA) blends in the melt was investigated. The blends were prepared at different blend compositions by a solution-casting method. Linear viscoelastic shear osc...

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Bibliographic Details
Published in:Polymers 2020-03, Vol.12 (3), p.724
Main Authors: Zainal, Nurul Fatahah Asyqin, Lai, Say Aik, Chan, Chin Han
Format: Article
Language:English
Subjects:
Composition
Elastic properties
Electrolytes
Ethylene oxide
Mixtures
Morphology
Natural rubber
Optical microscopy
Polyethylene oxide
Polymer blends
Polymethyl methacrylate
Pore size
Regression analysis
Rheological properties
Rheology
Studies
Viscoelasticity
Viscosity
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Summary:The influence of morphology on the rheological properties of poly(ethylene oxide) (PEO) and natural rubber- -poly(methyl methacrylate) (NR- -PMMA) blends in the melt was investigated. The blends were prepared at different blend compositions by a solution-casting method. Linear viscoelastic shear oscillations measurements were performed in order to determine the elastic and viscous properties of the blends in the melt. The rheological results suggested that the blending of the two constituents reduced the elasticity and viscosity of the blends. The addition of an even small amount of NR- -PMMA to PEO changed the liquid-like behavior of PEO to more solid-like behavior. Morphological investigations were carried out by optical microscopy to establish the relationship between morphology and melt viscosity. Depending on the blend compositions and viscosities, either droplet-matrix or co-continuous morphologies was observed. PEO/NR- -PMMA blends exhibited a broad co-continuity range, and phase inversion was suggested to occur at the PEO/NR- -PMMA blend with a mass ratio of 60/40 ( / ), when NR- -PMMA was added to PEO as a matrix.
ISSN:2073-4360
2073-4360
DOI:10.3390/polym12030724