The interfacial properties of terminally-attached chains differ from those of a homopolymer because one end of the polymer chain is irreversibly held at an interface. This surface bond may be either physical or chemical in nature. In the former case the chain must possess one end group which is capable of forming a strong physical bond with the surface. Strictly speaking, this is a special case of a block copolymer with a very strong anchoring group; it is treated in this chapter because of the similarity with chemically attached chains. The latter type of system may be prepared by a chemical grafting reaction between an end group and the surface.
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