Self-Entangled Long Chains in a Short-Chain Matrix

2 Self-Entangled Long Chains in a Short-Chain Matrix 

Now suppose that the concentration of long chains is low, but not so low as to be dilute in the matrix of short chains, i.e., c- i situation is depicted in Fig. 7.7 showing a few 

The time (or frequency) at which the long chain relaxes in Fig. 7.6b is set by the reptation time of the long chain l and is unaffected by the concentration or molecular weight of the short chain. 

The magnitude of the plateau in G(t) in Fig. 7.6b at times near l scales roughly as. While these features characterize experimental data discussed in Section 6.4.4.2, neither of them hold when the long chain is dilute in the short-chain matrix, as illustrated in Figs. 7.6a and 7.2. 

P t) whenever P t) decreases rapidly due to sudden relaxation of matrix chains. In no case can 

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