# Questions tagged [polymers]

Polymers is concerned with the physical properties of individual macromolecules. For questions regarding bulk behavior of ensembles of polymers, the [condensed-matter] tag may be more appropriate.

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### Derivation of probability density of isolated polymers

I am reading Introduction to Polymer Physics by Doi, and in his proof for the probability distribution for ideal polymers of length $N$ and end-to-end vector $\mathbf{R}$, he does the following: \...
39 views

### Canonical partition function, simple model of 2D polymer

I am trying to simulate using monte-carlo method the behavior of a simple of polymer. The model - The polymer is made of N bars with length a , each bar can be placed in +a or -a relative to the end ...
23 views

### Average radius of gyration of an ideal chain anchored to a wall at two ends

Suppose you have an n-monomer ideal chain with both ends constrained to be at the same point on an infinte wall (as shown below). Using the method of images, the partition function can be shown to be ...
39 views

### Discriminate closed-chain from open-chain

I have two classes of chains: closed-chains where a random path ends near where it starts (ie. loop), and open-chains without this restriction (ie. random walk). These chains are a directed graph ...
29 views

### Having trouble understand why excluded volume effect occurs

In the book of Edwards The Theory of Polymer Dynamics, at page 24 it is given that 2.5 Excluded volume effect In the models of polymers considered in the previous sections, the interaction among the ...
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### Worm-like chain model integral formula derivation (Kratky-Porod model)

I am having trouble understanding the derivation of the integral formula, most papers just assume the resistance to bending is: $$\frac{A}{2}\left|\frac{dt(s)}{ds}\right|^2.$$ I have found some ...