Copolymers in asymmetric interface potentials: A Monte Carlo study

Sommer, Jens-Uwe; Peng, Gongwen; Blumen, Alexander
November 1996
Journal of Chemical Physics;11/8/1996, Vol. 105 Issue 18, p8376
Academic Journal
We investigate using scaling methods and Monte Carlo simulations random AB-copolymers at the interface between two good solvents. The asymmetry of the interface potential gives rise to an adsorption–desorption transition which shows for infinitely long chains a critical point. For finite chains we analyze the crossover scaling behavior near this critical point. Two new interface exponents, namely the crossover exponent [lowercase_phi_synonym] and the interface order parameter exponent β are proposed. Simulation results obtained using the bond fluctuation model agree well with the scaling predictions. From the simulation data we obtain as best estimates [lowercase_phi_synonym]=1.3±0.1 and β=0.35±0.04. © 1996 American Institute of Physics.


Related Articles

  • Monte Carlo simulations of diblock copolymer thin films confined between two homogeneous surfaces. Wang, Qiang; Qiang Wang; Yan, Qiliang; Qiliang Yan; Nealey, Paul F.; de Pablo, Juan J. // Journal of Chemical Physics;1/1/2000, Vol. 112 Issue 1 

    Thin films of symmetric diblock copolymers confined between two hard, flat and homogeneous surfaces have been investigated by means of Monte Carlo simulations on a simple cubic lattice. For such simulations, the match between bulk lamellar period L[sub 0] and the simulation box size is crucial...

  • Monte Carlo investigations of dense copolymer systems II, Properties of ABA triblocks. Zifferer, Gerhard; Neubauer, Brigitte; Olaj, Oskar Friedrich // Journal of Chemical Physics;1/1/2000, Vol. 112 Issue 1 

    In the present article we give a detailed analysis of ABA triblock copolymers in a selective solvent that is a good one for the outer blocks and a theta solvent for the inner one. A lattice model is used for the investigations and the concentration ranges from a volume fraction φ=0 up to...

  • Monte Carlo simulation of the order-disorder transition of a symmetric cyclic diblock copolymer... Won Ho Jo; Seung Soon Jang // Journal of Chemical Physics;7/22/1999, Vol. 111 Issue 4, p1712 

    Reports that the microphase separation of symmetric cyclic diblock copolymer with decreasing temperature is simulated using the Monte Carlo method. Investigation of the effect of the ring-shape chain architecture on order-disorder transition; Ratio of the domain spacing in the cyclic diblock...

  • Block copolymer films between neutral walls: A Monte Carlo study. Sommer, Jens-Uwe; Hoffman, Alexander; Blumen, Alexander // Journal of Chemical Physics;8/22/1999, Vol. 111 Issue 8, p3728 

    Studies the block copolymer films between neutral walls using the Monte Carlo method. Film geometry, bulk and surface regions; Perpendicular orientation of lamellae for several box sizes; Preferential stretching of the chains in the direction parallel to the walls.

  • Adsorption of random copolymers: A scaling analysis. Sumithra, K.; Baumgaertner, A. // Journal of Chemical Physics;2/1/1999, Vol. 110 Issue 5, p2727 

    Reports on results from Monte Carlo simulations of a single random copolymer adsorbed on a homogeneous planar surface. Active attractive interactions of each monomer with the adsorbing surface; Scaling ansatz for the energy of the form; Low temperature properties.

  • Polymer chain binding with a flat adsorbent in the case of selective adsorption of segments:... Zheligovskaya, E.A.; Khalatur, P.G.; Khokhlov, A.R. // Journal of Chemical Physics;5/22/1997, Vol. 106 Issue 20, p8598 

    Studies adsorption of a single regular AB copolymer chain on a flat impenetrable surface by Monte Carlo simulation. Type A segments' attraction to the surface; Surface's role as an impenetrable obstacle for type B segments; Dependencies of average numbers of adsorbed sections, loops and tails;...

  • Statics and dynamics of dense copolymer melts: A Monte Carlo simulation study. Hoffman, Alexander; Sommer, Jens-Uwe; Blumen, Alexander // Journal of Chemical Physics;4/22/1997, Vol. 106 Issue 16, p6709 

    Performs dynamic Monte Carlo simulations on dense symmetric copolymer melts using the bond-fluctuation-algorithm. Model and simulation technique; Collective structure factor; Box-counting; Concentration profiles; Static properties of single chains; Diffusion of center of mass; Relaxation of the...

  • A Monte Carlo study on the effect of excluded volume interactions on the scattering from block copolymer micelles. Svaneborg, Carsten; Pedersen, Jan Skov // Journal of Chemical Physics;6/1/2000, Vol. 112 Issue 21, p9661 

    Effects of excluded volume interaction on the form factor of a block copolymer micelle model have been investigated by performing Monte Carlo simulations. The micelles are modeled as a corona of semi-flexible chains tethered to a spherical core. Simulated form factors are analyzed using the...

  • Ring comb copolymer brushes. Flikkema, Edwin; Xiao-Gang Wang; Subbotin, Andrei; Carrington Jr., Tucker; ten Brinke, Gerrit // Journal of Chemical Physics;11/1/2000, Vol. 113 Issue 17 

    The equilibrium conformations of isolated comb copolymer ring molecules in an athermal solution are investigated by off-lattice Monte Carlo simulations. The molecules considered consist of a closed flexible backbone densely grafted with flexible or rigid side chains. The study focuses on the...


Read the Article

Courtesy of

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics