Experimental and computational study on structure development of PMMA/SAN blends

Prusty, Manoranjan; Keestra, BJ; Goossens, Jgp Han; Anderson, Patrick Patrick

doi:10.1016/j.ces.2006.12.023

Cited by 23 publications

(33 citation statements)

References 34 publications

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“…The blend composition at positions a, b, and c is very close to the critical composition of PMMA/SAN, which is around 70/30 for this system. Figure a–c show co‐continuous morphologies indicative for spinodal decomposition at positions a–c and illustrate the effect of temperature on the phase separation kinetics, that is, the characteristic length scale of the morphology increases with increasing temperature due to a larger quench depth and a higher mobility, similar to previous observations on this system . Figure d–f show morphologies of spherical domains dispersed in a matrix reflecting the occurrence of binodal decomposition at positions d–f.…”

Section: Resultssupporting

confidence: 82%

The Control of Silica Nanoparticles on the Phase Separation of Poly(methyl methacrylate)/Poly(styrene‐co‐acrylonitrile) Blends

l’Abee

Goossens

2013

Macro Chemistry & Physics

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The influence of silica nanoparticles on the lower critical solution temperature (LCST) phase behavior and phase‐separation kinetics of a blend consisting of poly(methyl methacrylate) (PMMA) and poly(styrene‐co‐acrylonitrile) (SAN), is studied via a high‐throughput experimentation (HTE) approach, which combines a composition (φ) and a temperature (T) gradient. The evolution of the phase‐separation process is studied by optical microscopy (OM), small‐angle light scattering (SALS), and transmission electron microscopy (TEM). Depending on the specific interaction between the silica surface and the polymers, the distribution of silica particles during phase separation can be controlled to be either in one of the polymer phases or at the PMMA/SAN interface. The hydrophilic silica nanoparticles preferentially migrate to the PMMA phase, leading to a slow down of the coarsening rate, which may be related to a reduction of the mobility of PMMA due to an increase of the silica concentration. The hydrophobic silica nanoparticles are localized at the PMMA/SAN interface, and the inhibition of coalescence corresponds to the presence of a solid barrier (the nanoparticles) between the polymers, which prevents the coarsening process.

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Section: Resultssupporting

confidence: 82%

The Control of Silica Nanoparticles on the Phase Separation of Poly(methyl methacrylate)/Poly(styrene‐co‐acrylonitrile) Blends

l’Abee

Goossens

2013

Macro Chemistry & Physics

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“…Other field-based simulations have mainly relied on time-dependent Ginzburg Landau models, which have the advantage that one can reach much later stages of demixing. They were used to study demixing processes at equilibrium [126,[260][261][262][263] and under shear [264,265]. Particularly interesting morphologies can be obtained if the dynamics in the two phases is distinctly different, i.e., one component becomes glassy during the demixing process [31] or crystallizes [29,30,266].…”

Section: Homopolymer Blendsmentioning

confidence: 99%

Theory and Simulation of Multiphase Polymer Systems

Schmid

2011

Handbook of Multiphase Polymer Systems

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The theory of multiphase polymer systems has a venerable tradition. The 'classical' theory of polymer demixing, the Flory-Huggins theory, was developed in the 1940s [1,2]. It is still the starting point for most current approaches -be they improved theories for polymer (im)miscibility that take into account the microscopic structure of blends more accurately, or sophisticated field theories that allow to study inhomogeneous multicomponent systems of polymers with arbitrary architectures in arbitrary geometries. In contrast, simulations of multiphase polymer systems are quite young. They are still limited by the fact that one must simulate a large number of large molecules in order to obtain meaningful results. Both powerful computers and smart modeling and simulation approaches are necessary to overcome this problem.In the limited space of this chapter, we can only give a taste of the state-of-the-art in both areas, theory and simulation. Since the theory has reached a fairly mature stage by now, many aspects of it are covered in textbooks on polymer physics [3][4][5][6][7][8][9]. The information on the state-of-the art of simulations is much more scattered. This is why we have put some effort into putting together a representative list of references in this area -which is of course still far from complete.The chapter is organized as follows. In Section II, we briefly introduce some basic concepts of polymer theory. The purpose of this part is to make the chapter accessible to readers who are not very familiar with polymer physics; it can safely be skipped by the others. Section III is devoted to the theory of multiphase polymer systems. We recapitulate the Flory-Huggins theory and introduce in particular the concept of the Flory interaction parameter (the χ parameter), which is a central ingredient in most theoretical descriptions of multicomponent polymer systems. Then we focus on one of the most successful mean-field theories for inhomogeneous (co)polymer blends, the self-consistent field theory. We sketch the main idea, discuss various Handbook of Multiphase Polymer Systems, First Edition. Edited by Abderrahim Boudenne, Laurent Ibos, Yves Candau, and Sabu Thomas.

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“…The scattering angles were calibrated with a 300 lines/ mm grid. The data acquisition time was typically 1000 ms per image and was controlled by a home-made script running under Vþþ for Windows (version 4.0, Digital Optics Ltd) [24].…”

Section: Small-angle Light Scattering (Sals)mentioning

confidence: 99%

Thermoplastic vulcanizates obtained by reaction-induced phase separation: Interplay between phase separation dynamics, final morphology and mechanical properties

l’Abee

Goossens

Duin

2008

Polymer

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Experimental and computational study on structure development of PMMA/SAN blends

Cited by 23 publications

References 34 publications

The Control of Silica Nanoparticles on the Phase Separation of Poly(methyl methacrylate)/Poly(styrene‐co‐acrylonitrile) Blends

The Control of Silica Nanoparticles on the Phase Separation of Poly(methyl methacrylate)/Poly(styrene‐co‐acrylonitrile) Blends

Theory and Simulation of Multiphase Polymer Systems

Thermoplastic vulcanizates obtained by reaction-induced phase separation: Interplay between phase separation dynamics, final morphology and mechanical properties

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