In this work, we study the effect of reactive compatibilization on morphological and rheological properties of immiscible homopolymer blends of polydimethylsiloxane (PDMS) and polyisoprene (PI). The blend systems contained a chemical reaction between amine-functionalized PDMS and maleic anhydride-functionalized PI additives at high temperatures. Interfacially cross-linked compatibilizers obtained with this procedure are investigated through dynamic rheological measurements and Fourier transform infrared spectroscopy. The results show that the interfacial cross-linking constituting strong heterogeneous network is symmetric, as it reduces the sizes of the dispersed phase with higher stability in both compatibilized PI-continuous and PDMS-continuous blends compared to their uncompatibilized counterparts. A complete suppression of droplet coalescence can be concluded due to the superposition of linear viscoelasticity of the reactively compatibilized blends after different shearing protocols. In the previous work [C. DeLeo et al., J. Rheol. 55(4), 713–731 (2011)], however, the weak network at room temperature was found to have an asymmetric effect on the suppression of drop coalescence.
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September 2018
Research Article|
September 01 2018
Suppressing droplet coalescence and aggregation in immiscible homopolymer blends by interfacially cross-linked compatibilizers
Jaber Nasrollah Gavgani;
Jaber Nasrollah Gavgani
1
Department of Polymer Engineering and Color Technology, Amirkabir University of Technology
, P.O. Box 15875-4413, Tehran, Iran
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Fatemeh Goharpey;
Fatemeh Goharpey
a)
1
Department of Polymer Engineering and Color Technology, Amirkabir University of Technology
, P.O. Box 15875-4413, Tehran, Iran
a)Author to whom correspondence should be addressed; electronic mail: goharpey@aut.ac.ir
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Sachin Velankar;
Sachin Velankar
2
Department of Chemical Engineering, University of Pittsburgh
, Pittsburgh, Pennsylvania 15261
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Reza Foudazi
Reza Foudazi
3
Department of Chemical and Materials Engineering, New Mexico State University
, Las Cruces, New Mexico 88003
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a)Author to whom correspondence should be addressed; electronic mail: goharpey@aut.ac.ir
J. Rheol. 62, 1217–1231 (2018)
Article history
Received:
December 29 2017
Accepted:
August 03 2018
Citation
Jaber Nasrollah Gavgani, Fatemeh Goharpey, Sachin Velankar, Reza Foudazi; Suppressing droplet coalescence and aggregation in immiscible homopolymer blends by interfacially cross-linked compatibilizers. J. Rheol. 1 September 2018; 62 (5): 1217–1231. https://doi.org/10.1122/1.5020961
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