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Volumn 107, Issue 16, 1997, Pages 6479-6490

Macromolecular clusters in poor-solvent polymer solutions

Author keywords

[No Author keywords available]

Indexed keywords


EID: 0001759392     PISSN: 00219606     EISSN: None     Source Type: Journal    
DOI: 10.1063/1.474306     Document Type: Article
Times cited : (43)

References (39)
  • 20
    • 85033176312 scopus 로고    scopus 로고
    • note
    • 1 values.
  • 25
    • 85033169796 scopus 로고    scopus 로고
    • note
    • 3/2 in Eq. (20) ensures a consistent calculation of the second virial coefficient from the free energy of the "infinite cluster" and from the interaction free energy between two chains (Ref. 15).
  • 26
    • 85033175858 scopus 로고    scopus 로고
    • note
    • Neglecting cluster-cluster interactions does not amount to neglecting all polymer-polymer interactions. To some extent, these are implicitly taken into account by allowing for chain association. A similar view of real gas behavior has been around for some time: (Ref.25) the virial equation of state may be derived by considering the equilibria between single molecules and clusters, in an otherwise ideal gas mixture.
  • 28
    • 85033161047 scopus 로고    scopus 로고
    • note
    • This expression is exact in any dimensionality for a system of identical objects, as well as for a one-dimensional system of different objects with variable size and shape. It leads to the well-known entropy expression for an ideal mixture, which can be surprisingly accurate even for molecules of different sizes (Ref. 27).
  • 32
    • 85033181668 scopus 로고    scopus 로고
    • note
    • There is a subtle but important question concerning any sort of microphase separation: how large should a concentration inhomogeneity be, for it to be classifiable as a "phase"? In the present instance: how large should the chain length be, for the globular state to be classifiable as a microphase? A pragmatic answer could be that the two concepts (globule and microphase) go hand-in-hand; a short chain never undergoes a substantial reduction of its size, even at large undercoolings. In connection with this, we point out that the "universal" plots of Figs. 4-6 are truly N-independent only when N≫1; for short chains, there are important intramolecular "screened interactions" (Refs. 5 and 6) which resist collapse.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.