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The Journal of Chemical Physics
Volumn 103, Issue 14, 1995, Pages 6296-6299
Mode-coupling theory of diffusion in block copolymer melts: Influence of concentration fluctuations
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EID: 0001552342     PISSN: 00219606     EISSN: None     Source Type: Journal    
DOI: 10.1063/1.470410     Document Type: Article
Times cited : (27)
References (37)
  • 16
    • 0005057528 scopus 로고
    • These workers skip the crucial renormalized Rouse step required to describe entangled polymer dynamics in the original PMC theory in Refs. 12 and 13. Thus, their analysis is, at best, only appropriate for unentangled systems. Not accounting for the change in the scattering function peak width of diblock copolymers near the ODT [see the italic letters beneath Eq. (6)], the second paper overestimates the concentration fluctuation induced friction Ξ̃(0) as dominant over the contribution from density fluctuations Ξ̃cc (0) = O(1). The correct result is Ξ̃(0)∞N −1/3 ≪Ξ̃cc (0), leading to D∞N −1, i.e., the Rouse behavior is unaffected by concentration fluctuations
    • (1994) J. Chem. Phys. , vol.101 , pp. 7101-7111
    • Genz, U.1    Vilgis, T.A.2
  • 36
    • 85034928166 scopus 로고    scopus 로고
    • For the sake of consistency with the theoretical model, we have ignored the slight composition asymmetry in the experimental PEP-PEE samples. This approximate treatment should have little influence on the final results
  • 37
    • 85034920614 scopus 로고    scopus 로고
    • The noticeable deviation between the PMC theory and the experiments for the diffusion of PEP-PEE 3 in PEP-PEE 2 in Fig. 1(b) may possibly be attributed to the neglect of the matrix constraint release effects, which is not fully appropriate here, as the tracer is longer than the matrix polymer by about 60%

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