in situ: monomer polymerize inside the material and form polymer, e.g. polymerization within porous objects.
End-functionalized polymer chains may be grafted to the solid substrate (grafting to) or the grafting reaction can proceed by polymerization from the surface (grafting from). In both cases a thin polymer brush layer on the solid surface is formed, which determines the surface properties.
adopted from
Polymer Surfaces and Interfaces pp 215-234
Grafting on Solid Surfaces: “Grafting to” and “Grafting from” Methods
Dear Mr Amin and Iqbal. Thank you so much for your help and information. Yes I will read the articles and refer your answers. Thank you again and again