Premium
Diffusion‐Limited Segregation of Diblock Copolymers to a Homopolymer Surface
Author(s) -
Budkowski Andrzej,
Losch Andreas,
Klein Jacob
Publication year - 1995
Publication title -
israel journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.908
H-Index - 54
eISSN - 1869-5868
pISSN - 0021-2148
DOI - 10.1002/ijch.199500011
Subject(s) - chemistry , copolymer , polystyrene , radius of gyration , diffusion , polymer chemistry , gyration , kinetic energy , polymer , thermodynamics , chemical physics , organic chemistry , physics , geometry , mathematics , quantum mechanics
Using nuclear reaction analysis, we have measured the rate of surface segregation of an asymmetric diblock polyisoprene–polystyrene (PIPS) copolymer to the free surface of polystyrene (PS) homopolymers within which it is incorporated at low bulk concentrations. We have also measured the tracer diffusion coefficient of PIPS in PS under similar conditions, and shown it to equal, within error, the self‐diffusion coefficient of PS of a similar length. The equilibrium surface excess Γ of the diblock is low (