Molecular orientation at the interface of polystyrene/poly(methyl methacrylate) blends: evidence from sum-frequency spectroscopy.
Molecular orientation of the ester methyl groups of poly(methyl methacrylate) (PMMA) at the polystyrene (PS)-PMMA interface was detected by sum-frequency (SF) spectroscopy. The SF signals originate from the polymer-polymer interface as evidenced by the measurements of the blends/D2O system and the red shift of the peak position of the ester methyl groups. We have also demonstrated that SF spectroscopy can provide information about the interfacial structure of the PS/PMMA blend.
Liu
Yi
Y
Department of Chemistry, Lehigh University, 7 Asa Drive, Bethlehem, Pennsylvania 18015, USA.
Messmer
Marie C
MC