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25
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2442602083
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This work is a convenient reference on the Rouse model because the notation used is identical to that used here
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(1993)
J. Chem. Phys.
, vol.98
, pp. 9916
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Grayce, C.1
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43
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0027912499
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and seem to be inconclusive at this point, so we have chosen here for the sake of argument to enforce agreement with the [formula omitted] reported in the interdiffusion experiments, which implies no end segregation
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(1993)
Macromolecules
, vol.26
, pp. 6251
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Affrossman, S.1
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47
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85034919507
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A more detailed calculation using mode-coupling theory of [formula omitted] could turn up a dependence on N and quantitative modification of other ripple features. Detailed numerical calculations (Ref. 26) show that the Markov regime, which is expected to apply as [formula omitted] is not attained for experimentally accessible molecular weights, i.e., [formula omitted] Non-Markov or “time-dependent friction” effects influences different Rouse modes in different ways which may be important, especially at the molecular level of calculation, for the ripple question. Moreover, the competition between single-chain conformational relaxation and center-of-mass diffusion is a subtle question still not well understood within the tube model approaches, and this aspect may be important for the ripple experiment (see Fig. 20)
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For the mode-coupling theory, however, we can only make this statement in the Markov limit in which we have studied the theory in Sec. III B
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