J. G. E. M. Fraaije

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We introduce and apply a variant of a dynamic self-consistent field simulation in two dimensions to predict the structure of interfaces between a nematic and an amorphous polymer compatibilized by a diblock copolymer. First, we investigate the effect of the nematic order on the polymer polymer interface without compatibilizer. Then we include the(More)
We discuss the development of hierarchical polymer particles, or variegated polymersome composites, in which at least two different components are phase separated within one polymersome chimaera. We briefly discuss the present status in experimental polymersome research, and then discuss a speculative design strategy, based on mesoscopic simulations with a(More)
We present a simple method for the numerical calculation of the noise distribution in multicomponent functional Langevin models. The topic is of considerable importance, in view of the increased interest in the application of mesoscopic dynamics simulation models to phase separation of complex uids in polymer and surfactant industries. We show that simple(More)
In this paper, we incorporate some real-system effects into the theory of orientational phase transitions under shear flow [M. E. Cates and S. T. Milner, Phys. Rev. Lett. 62 1856 (1989) and G. H. Fredrickson, J. Rheol. 38, 1045 (1994)]. In particular, we study the influence of the shear-cell boundaries on the orientation of the lamellar phase. We predict(More)
In the present paper, we extend the dynamic mean-eld density functional method which describes microphase separation phenomena in polymer liquids , to account for viscoelastic eeects. The eeect of simple steady shear on polymer orientation and elongation is taken into account by adapting the polymer conngurational distribution function. We propose a(More)
We rigorously derived effective potentials for solvent-free DPD simulation of lipid bilayers. The derivation relies on an earlier developed hybrid particle/field method and is based on the idea that the solvent is always in local equilibrium on a coarse-grained time scale, given the instantaneous templates set by the self-assembly structure. By relating the(More)
We develop a theory to describe the reorientation phenomena in the lamellar phase of block copolymer melts under reciprocating shear flow. We show that, similar to the steady shear, the oscillating flow anisotropically suppresses fluctuations and gives rise to the [parallel]--> [perpendicular] transition. The experimentally observed high-frequency reverse(More)