منابع مشابه
0 Polydisperse star polymer solutions
We analyze the effect of polydispersity in the arm number on the effective interactions , structural correlations and the phase behavior of star polymers in a good solvent. The effective interaction potential between two star polymers with different arm numbers is derived using scaling theory. The resulting expression is tested against monomer-resolved molecular dynamics simulations. We find th...
متن کاملConformations of polydisperse polymer solutions : bimodal distribution
2014 Starting with the Flory theory for one long flexible polymer chain of N segments in a homopolymer melt of shorter (P segments) chains, we employ scaling arguments to construct the « phase diagram » of an athermal bimodal solution, i.e. a ternary system composed of N chains, P chains, and solvent. Qualitatively the presence of short chains reduces the effective solvent quality as experience...
متن کاملStructural arrest in dense star-polymer solutions.
The dynamics of star polymers is investigated via extensive molecular and Brownian dynamics simulations for a large range of functionality f and packing fraction eta. The calculated isodiffusivity curves display both minima and maxima as a function of eta and minima as a function of f. Simulation results are compared with theoretical predictions based on different approximations for the structu...
متن کاملTriplet interactions in star polymer solutions
We analyze the effective triplet interactions between the centers of star polymers in a good solvent. Using an analytical short-distance expansion inspired by scaling theory, we deduce that the triplet part of the three-star force is attractive but only 11% of the pairwise part even for a close approach of three star polymers. We have also performed extensive computer simulations for different ...
متن کاملAdsorption of polydisperse polymer chains
The adsorption of polydisperse ideal polymer chains is shown to be sensitive to the large N tail of the distribution of chains. If and only if the number of chains decays more slowly than exponentially then there is an adsorption transition like that of monodisperse infinite chains. If the number decays exponentially the adsorption density diverges continuously at a temperature which is a funct...
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ژورنال
عنوان ژورنال: Physical Review E
سال: 2000
ISSN: 1063-651X,1095-3787
DOI: 10.1103/physreve.62.6949