Journal ArticleDOI
Effect of Marangoni stresses on the deformation and coalescence in compatibilized immiscible polymer blends
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TLDR
The effect of physical compatibilization on the deformation and coalescence of droplets in immiscible polymer blends is discussed in this article, where evidence is provided for the existence of concentration gradients in block copolymers along the interface during deformation.Abstract:
The effect of physical compatibilization on the deformation and coalescence of droplets in immiscible polymer blends is discussed. Evidence is provided for the existence of concentration gradients in block copolymers along the interface during deformation. This causes complex changes in droplet shapes during deformation and relaxation. These concentration gradients also result in Marangoni stresses, which stabilize the droplets against deformation and breakup. Coalescence experiments have been performed, varying both the compatibilizer concentration and the shear rate. Existing coalescence models have been evaluated. An empirical extension of Chesters' partially mobile interface model is presented, that treats the effects of Marangoni stresses on the coalescence process as a higher effective viscosity ratio.read more
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Rheological, morphological, and interfacial properties of compatibilized PLA/PBAT blends
TL;DR: In this article, the effect of a multifunctional epoxide (Joncryl®;ADR-4368) on the interfacial properties of biopolymer blends based on poly(lactic acid) (PLA) and poly(butylene adipate-co-terephthalate) (PBAT) was systematically investigated.
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Phase-field modeling droplet dynamics with soluble surfactants
Haihu Liu,Yonghao Zhang +1 more
TL;DR: The increase of surfactant concentration and attractive lateral interaction can enhance droplet deformation, promote droplet breakup, and inhibit droplet coalescence, and it is demonstrated that the Marangoni stresses can reduce the interface mobility and slow down the film drainage process.
Journal ArticleDOI
The mechanism of surfactant effects on drop coalescence
Bing Dai,L. Gary Leal +1 more
TL;DR: In this article, numerical solutions were used to investigate the mechanisms by which surfactant influences the coalescence of a pair of equal size drops that undergo a head-on collision in a biaxial linear flow.
Journal ArticleDOI
Melt Viscosity, Elasticity, and Morphology of Reactively Compatibilized Polyamide 6/Styrene−Acrylonitrile Blends in Shear and Elongation
TL;DR: In this article, the melt rheology of reactively compatibilized polyamide 6/styrene−acrylonitrile (PA 6/SAN) blends was studied in linear viscoelastic shear oscillations, simple elongation to a large stretch ratio, and subsequent recovery.
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Steady-shear rheological properties of model compatibilized blends
TL;DR: In this paper, the effect of the compatibilization of polyisobutylene (PIB) droplets in a polydimethylsiloxane (PDMS) matrix with a diblock copolymer of PIB and PDMS was investigated.
References
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Book
Viscoelastic properties of polymers
TL;DR: In this article, the authors describe the nature of Viscoelastic behavior of polymeric systems and approximate relations among the linear Viscoels and approximate interrelations among the Viscelastic Functions.
Journal ArticleDOI
Drop Breakup and Coalescence in Polymer Blends - The Effects of Concentration and Compatibilization
TL;DR: In this article, it was shown that the Taylor limit for the breakup of a single drop in a matrix underpredicts the limiting particle size; this discrepancy is attributed to viscoelastic effects.
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Strategies for compatibilization of polymer blends
Journal ArticleDOI
Compatibilizers for Melt Blending: Premade Block Copolymers†
Christopher W. Macosko,Philippe Guégan,Ashish K. Khandpur,Akinari Nakayama,Akinari Nakayama,Philippe Marechal,Takashi Inoue +6 more
TL;DR: In this paper, a block copolymer was used to prevent dynamic and static coalescence of polymethyl methacrylate (PMMA) particles in polystyrene with and without symmetric P(S-b-MMA) diblock copolymers.