College Park, Maryland June 6 - 10 , 2004 |
MP13: The effect of graft density and length on the surface segregation of graft copolymers in a homopolymer matrix.
M. A. Lay (University of Tennessee, Knoxville), M. D. Dadmun ( University of Tennessee, Knoxville)
The effect of graft density and length on the surface segregation of graft copolymers in a homopolymer matrix. Copolymers may be used to modify polymer interfaces in polymer blends. Copolymer architecture plays a substantive role in the ability of copolymers to migrate to an interface. We have recently examined the diffusion of various graft copolymers in an effort to determine to what extent graft density and length affect surface segregation. Copolymers composed of a PS backbone and PMMA graft segments were prepared via ATRP. Interfacial broadening was studied as a function of annealing time, so that a diffusion coefficient could be determined. This insight into the architectural influence on surface segregation will help us better understand practical processes dependent upon diffusion such as adhesion, interface formation, and phase separation.
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