SELF-ORGANIZATION NF POLYSILOXANE BLENDS IN THIN-LAYERS AND LANGMUIR FILMS

the compatibility of the blends of PDMS and cyclolinear poly(decamethy lhexasiloxane)s in monomolecular layers and thin films was studied by measuring surface pressure as a function of specific area, Using PDMS with different molecular masses allowed us to prepare three types of c omposite films: those with completely mutually soluble components in t he monomolecular layer, those with partially soluble components, and t hose with completely insoluble components. In the blends with mutually soluble components, the self-organization of polycyclosiloxanes into discrete multilayer structures is suppressed. For the blends containin g insoluble components, the surface pressure isotherm is composed of t wo independent isotherms typical of pure compounds, the development of multilayers proceeding independently of the presence of the second co mponent, For the blends containing partially soluble components, the c orresponding surface isotherm exhibits an intermediate character and i s determined by the composition of the coexisting phases.