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publications:1997polymermeltwettingbrush [2011/12/04 01:37]
cgay créée
publications:1997polymermeltwettingbrush [2011/12/17 20:02] (Version actuelle)
cgay
Ligne 4: Ligne 4:
 **Wetting of a polymer brush by a short homopolymer melt**\\ **Wetting of a polymer brush by a short homopolymer melt**\\
 C. Gay,​\\ ​ C. Gay,​\\ ​
-//​Macromolecules//​ **30** 5939-5943 (1997).+//​Macromolecules//​ **30** 5939-5943 (1997).\\ 
 +[[http://​pubs.acs.org/​doi/​abs/​10.1021/​ma970107f|Journal link]] -  
 +[[publications:​bibtex|BibTeX]]
  
 **Abstract / Résumé** **Abstract / Résumé**
  
 We present a theoretical study of the conformations of a polymer brush (made of linear macromolecules chemically anchored to a flat, solid interface) when it is exposed to a molten, compatible polymer. At large brush grafting densities sigma and melt molecular weights P, the melt only penetrates the brush over a distance lambda that is small, compared to the brush thickness. For P > N^{2/3} sigma^{-2/​3},​ the penetration length lambda = a sigma^{-1/​3} N^{1/3} (Leibler et al, 1993) is associated with partial wetting. For P < N^{2/3} sigma^{-2/​3},​ although wetting is complete (as was predicted by Leibler et al), we find that penetration is still partial: lambda = aN/(sigma P). There should be implications in interfacial rheology and in wetting dynamics. We present a theoretical study of the conformations of a polymer brush (made of linear macromolecules chemically anchored to a flat, solid interface) when it is exposed to a molten, compatible polymer. At large brush grafting densities sigma and melt molecular weights P, the melt only penetrates the brush over a distance lambda that is small, compared to the brush thickness. For P > N^{2/3} sigma^{-2/​3},​ the penetration length lambda = a sigma^{-1/​3} N^{1/3} (Leibler et al, 1993) is associated with partial wetting. For P < N^{2/3} sigma^{-2/​3},​ although wetting is complete (as was predicted by Leibler et al), we find that penetration is still partial: lambda = aN/(sigma P). There should be implications in interfacial rheology and in wetting dynamics.
 
publications/1997polymermeltwettingbrush.txt · Dernière modification: 2011/12/17 20:02 par cgay
 
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