Immiscible blend morphology after shear and elongation

Gibson L. Batch; Milana Trifkovic; Aaron Hedegaard; Chris Macosko

doi:10.1063/1.4918470

Immiscible blend morphology after shear and elongation

Gibson L. Batch, Milana Trifkovic, Aaron Hedegaard, Chris Macosko

Chemical Engineering and Materials Science

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

2 Scopus citations

Abstract

This work examines the role of shear and extensional strain on immiscible blend morphology, namely domain size, orientation, and co-continuity. The domain size reduces with surface tension similar to what is observed with isolated droplets. The domain size is shown to increase with shear strain due to coalescence. Hence the best mixing is found with low shear strains, i.e. low rates of shear and short durations of time. Extensional strain (extrusion draw ratio DR) reduces phase width and thickneb with a DR^-0.5 dependence, suggesting the transformation to a fibrilar morphology. The critical draw ratio for morphology transformation is approximately 7, in agreement with observations by Grace for droplet breakup in elongation. Fibrilar morphology is also consistent with a large increase in strain-To-break in the drawn film and with observed creep and optical scattering behavior.

Original language	English (US)
Title of host publication	Proceedings of PPS-30
Subtitle of host publication	The 30th International Conference of the Polymer Processing Society - Conference Papers
Editors	Sadhan C. Jana
Publisher	American Institute of Physics Inc.
ISBN (Electronic)	9780735413092
DOIs	https://doi.org/10.1063/1.4918470
State	Published - May 22 2015
Event	30th International Conference of the Polymer Processing Society, PPS 2014 - Cleveland, United States Duration: Jun 6 2014 → Jun 12 2014

Publication series

Name	AIP Conference Proceedings
Volume	1664
ISSN (Print)	0094-243X
ISSN (Electronic)	1551-7616

Other

Other	30th International Conference of the Polymer Processing Society, PPS 2014
Country/Territory	United States
City	Cleveland
Period	6/6/14 → 6/12/14

Bibliographical note

Publisher Copyright:
© 2015 AIP Publishing LLC.

Keywords

Blends
Extensional Flow
Morphology
Polymer Procebing

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10.1063/1.4918470

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Batch, G. L., Trifkovic, M., Hedegaard, A., & Macosko, C. (2015). Immiscible blend morphology after shear and elongation. In S. C. Jana (Ed.), Proceedings of PPS-30: The 30th International Conference of the Polymer Processing Society - Conference Papers Article 1000031 (AIP Conference Proceedings; Vol. 1664). American Institute of Physics Inc.. https://doi.org/10.1063/1.4918470

Immiscible blend morphology after shear and elongation. / Batch, Gibson L.; Trifkovic, Milana; Hedegaard, Aaron et al.
Proceedings of PPS-30: The 30th International Conference of the Polymer Processing Society - Conference Papers. ed. / Sadhan C. Jana. American Institute of Physics Inc., 2015. 1000031 (AIP Conference Proceedings; Vol. 1664).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Batch, GL, Trifkovic, M, Hedegaard, A & Macosko, C 2015, Immiscible blend morphology after shear and elongation. in SC Jana (ed.), Proceedings of PPS-30: The 30th International Conference of the Polymer Processing Society - Conference Papers., 1000031, AIP Conference Proceedings, vol. 1664, American Institute of Physics Inc., 30th International Conference of the Polymer Processing Society, PPS 2014, Cleveland, United States, 6/6/14. https://doi.org/10.1063/1.4918470

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N2 - This work examines the role of shear and extensional strain on immiscible blend morphology, namely domain size, orientation, and co-continuity. The domain size reduces with surface tension similar to what is observed with isolated droplets. The domain size is shown to increase with shear strain due to coalescence. Hence the best mixing is found with low shear strains, i.e. low rates of shear and short durations of time. Extensional strain (extrusion draw ratio DR) reduces phase width and thickneb with a DR-0.5 dependence, suggesting the transformation to a fibrilar morphology. The critical draw ratio for morphology transformation is approximately 7, in agreement with observations by Grace for droplet breakup in elongation. Fibrilar morphology is also consistent with a large increase in strain-To-break in the drawn film and with observed creep and optical scattering behavior.

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Immiscible blend morphology after shear and elongation

Abstract

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Keywords

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