Related Experiment Video
Updated: May 26, 2026
08:00
DNA Nanotubes as a Versatile Tool to Study Semiflexible Polymers
Published on: October 25, 2017
Simulating flexible polymers in a potential of randomly distributed hard disks
Sebastian Schöbl1, Johannes Zierenberg, Wolfhard Janke
1Institut für Theoretische Physik and Centre for Theoretical Sciences (NTZ) Universität Leipzig, Leipzig, Germany.
Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|December 21, 2011
Summary
Computer simulations reveal that high-density disorder significantly impacts flexible polymer configurations. Low-density disorder has a marginal effect, while high-density disorder, featuring cavities and channels, dominates polymer properties.
Area of Science:
- Condensed Matter Physics
- Polymer Physics
- Computational Physics
Background:
- Polymers in disordered environments are crucial in materials science.
- Understanding polymer behavior under quenched disorder is complex.
- High-density disorder introduces unique structural features like cavities and channels.
Purpose of the Study:
- To investigate the configurational properties of a 2D flexible polymer in a quenched disorder potential.
- To analyze the influence of disorder density on polymer scaling behavior.
- To compare simulation results from different computational methods.
Main Methods:
- Equilibrium computer simulations using an off-lattice growth algorithm.
- Parallel polymer construction via monomer-by-monomer growth.
- Multicanonical Monte Carlo simulations for result cross-checking.
Main Results:
- Disorder potential significantly influences polymer configuration at high densities.
- Low-density disorder has a marginal impact on polymer properties.
- End-to-end distribution, tangent-tangent correlations, and scaling behavior were measured.
Conclusions:
- High-density disorder, characterized by cavities and channels, fundamentally alters polymer structure.
- The chosen simulation methods provide reliable insights into polymer behavior in complex potentials.
- Further research can explore different polymer architectures and disorder types.
Related Concept Videos
01:10Polymers: Molecular Weight Distribution
For any given polymer, the weight average molecular weight (Mw) is higher than, if not equal to, the number average molecular weight (Mn). The only situation in which the weight average molecular weight and the number average molecular weight are equal is when a polymer consists only of chains with equal molecular weight. However, this never happens in a synthetic polymer, since it is difficult to control the polymerization process up to a molecular level with accuracy to a hundred percent.
01:08Molecular Weight of Step-Growth Polymers
Step growth polymerization involves bi or multifunctional monomers. Bifunctional monomers react to form linear step growth polymers, whereas multifunctional monomers react to form non-linear or branched polymers.
As the step-growth polymerization involves step-wise condensation of monomers, the molecular weight also builds up eventually. Consequently, high molecular weight polymers are obtained at the late stages of the polymerization, where 99% of monomers have been consumed.
The extent of the...
As the step-growth polymerization involves step-wise condensation of monomers, the molecular weight also builds up eventually. Consequently, high molecular weight polymers are obtained at the late stages of the polymerization, where 99% of monomers have been consumed.
The extent of the...
01:21Polymer Classification: Crystallinity
Unlike ionic or small covalent molecules, polymers do not form crystalline solids due to the diffusion limitations of their long-chain structures. However, polymers contain microscopic crystalline domains separated by amorphous domains.
Crystalline domains are the regions where polymer chains are aligned in an orderly manner and held together in proximity by intermolecular forces. For example, chains in the crystalline domains of polyethylene and nylon are bound together by van der Waals...
Crystalline domains are the regions where polymer chains are aligned in an orderly manner and held together in proximity by intermolecular forces. For example, chains in the crystalline domains of polyethylene and nylon are bound together by van der Waals...
01:24Determination of Molar Masses of Polymers I
Polymerization produces macromolecules with a range of chain lengths due to the random nature of molecular growth processes. As chains form and terminate at different stages, a single polymer sample contains molecules of varying sizes rather than a uniform structure. This variability is described using average molar masses and distribution-related parameters, which together provide a comprehensive understanding of polymer characteristics.The distribution of molar masses plays a critical role in...
02:34Polymers
The word polymer is derived from the Greek words “poly” which means “many” and “mer” which means “parts”. Polymers are long chains of molecules composed of repeating units of smaller molecules, known as monomers. They either occur naturally, such as DNA and proteins, or can be constructed synthetically, like plastics. They have varied structural characteristics, such as linear chains, branched chains, or complex networks, that contribute to the properties that they exhibit. Additionally,...
02:34Polymers
The word polymer is derived from the Greek words “poly” which means “many” and “mer” which means “parts”. Polymers are long chains of molecules composed of repeating units of smaller molecules, known as monomers. They either occur naturally, such as DNA and proteins, or can be constructed synthetically, like plastics. They have varied structural characteristics, such as linear chains, branched chains, or complex networks, that contribute to the properties that they exhibit. Additionally,...