Rheology and microstructures formation of immiscible model polymer blends under steady state and transient flows
Document Type
Article
Publication Date
12-15-2005
Department
Department of Materials Science and Engineering
Abstract
Viscoelastic properties of model immiscible blend were studied here under steady state condition at different initial conditions and transient flow conditions. The flow-induced microstructure has been studied on these model blends. For this system, the elastic properties of the blend are mainly governed by the interface. Measurement of the dynamic modulus and of the first normal stress difference, both reflecting this enhanced elasticity, have been used to prove the blend morphology. The dynamic moduli after cessation of shear flow, the mean diameter of the disperse phase as generated by the shear flow, have been calculated using the model of Palierne. A procedure based on a direct fitting of the dynamic moduli with the model is compared with the one that uses a weight relaxation spectrum. On the other hand, the steady state normal stress data have been related to the morphology of the blend by means of Doi and Ohta model. The specific interfacial area is found to be inversely proportional to the ratio of interfacial tension over shear stress for the blend. The flow behavior during transient shear flow was also discussed.
Publication Title
Journal of Polymer Science, Part B: Polymer Physics
Recommended Citation
Das, N.,
Wang, H.,
Mewis, J.,
&
Moldenaers, P.
(2005).
Rheology and microstructures formation of immiscible model polymer blends under steady state and transient flows.
Journal of Polymer Science, Part B: Polymer Physics,
43(24), 3519-3533.
http://doi.org/10.1002/polb.20625
Retrieved from: https://digitalcommons.mtu.edu/michigantech-p/3851
Publisher's Statement
© 2005 Wiley Periodicals, Inc. Publisher’s version of record: https://doi.org/10.1002/polb.20625