Electronic Resource
College Park, Md.
:
American Institute of Physics (AIP)
The Journal of Chemical Physics
105 (1996), S. 9362-9370
ISSN:
1089-7690
Source:
AIP Digital Archive
Topics:
Physics
,
Chemistry and Pharmacology
Notes:
We study a diblock AB copolymer brush in good solvent using the self-consistent field approximation. The copolymer chains of the brush are end grafted to a planar surface always by the same type of monomers. Depending on the Flory–Huggins interaction parameter χAB, we found two different regimes. If χAB(approximately-greater-than)0 a demixing transition occurs when the solvent is poor. An exclusion zone appears close to the grafting surface from where one type of monomers is expelled. In this region a steplike brush is formed by the other monomers. At the extremity of this brush appears then a conventional parabolic brush formed by the excluded monomers. If χAB〈0 the monomers are miscible and backwards twisted configurations become very important as |χAB| increases. For larger values of |χAB| the collapse of the system may occur. © 1996 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.472725
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