STUDIES OF SPREAD MONOLAYERS OF DERIVATIVE OF STYRENE-MALEIC ANHYDRIDE COPOLYMERS

Reaction of alternating styrene-maleic anhydride copolymer with octade cylamine gave a half-ester of styrene-maleic anhydride copolymer which on further heating resulted in the polyimide. These form stable monol ayers at an air/water interface and have been studied using the II-A i sotherms. The nature of the packing of the films and the behaviour of the hydrophobic chains as a function of surface density have been anal yzed using photoelastic modulated Fourier transform infrared (PEM FTIR ) spectroscopy for the Langmuir films at an air/water interface in the 3000-2700 cm(-1) region. The Langmuir-Blodgett (LB) films obtained fr om these monolayers are characterized by a high degree of two-dimensio nal ordering as demonstrated by the good packing seen by scanning tunn elling microscopy. In both the polymers, the alkyl chains are complete ly out of the water subphase, especially at high surface pressure, phe nyl groups are almost completely submerged in the water.