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An ideal chain (or freely-jointed chain) is the simplest model in polymer chemistry to describe polymers, such as nucleic acids and proteins.It assumes that the monomers in a polymer are located at the steps of a hypothetical random walker that does not remember its previous steps.
The Kuhn length is a theoretical treatment, developed by Werner Kuhn, in which a real polymer chain is considered as a collection of Kuhn segments each with a Kuhn length . Each Kuhn segment can be thought of as if they are freely jointed with each other.
The freely-jointed chain is the simplest model of a polymer. In this model, fixed length polymer segments are linearly connected, and all bond and torsion angles are equiprobable. [10] The polymer can therefore be described by a simple random walk and ideal chain. The model can be extended to include extensible segments in order to represent ...
The freely joined chain, also called an ideal chain, follows the random walk model. Microscopically, the 3D random walk of a polymer chain assumes the overall end-to-end distance is expressed in terms of the x, y and z directions: Model of the freely jointed chain
A real polymer is not freely-jointed. A -C-C- single bond has a fixed tetrahedral angle of 109.5 degrees. The value of L is well-defined for, say, a fully extended polyethylene or nylon, but it is less than N x l because of the zig-zag backbone. There is, however, free rotation about many chain bonds. The model above can be enhanced.
The U.S., Japan, South Korea and Taiwan are on a mission to restructure the global chip supply chain. The proposed “Chip 4 Alliance” wants to internalize all parts of the semiconductor ...
The conformation assumed by a polymer chain in dilute solution can be modeled as a random walk of monomer subunits using a freely jointed chain model. However, this model does not account for steric effects.
Days after he was fired by President Donald Trump, former Joint Chiefs of Staff chairman Air Force Gen. C.Q. Brown took to social media to express his gratitude for his time in the military. "I ...