Differentiation of stereoregular polymethyl methacrylates by the film‐balance technique

Molecular Conformation and Application of Stereoregular PMMA Langmuir-Blodgett Films

“…1 with surface pressure-area ( -A) isotherms. The -A isotherms are qual-itatively consistent with the previous results [1], [2], [4]. The surface potentials of the sand a-PMMAs increase rapidly from zero even in the region where D 0.…”

“…Poly(methyl methacrylate) (PMMA) Langmuir-Blodgett (LB) films are of interest due to their potential application in optical devices and microlithography [1]- [3]. About 30 years ago, different stereoregular PMMAs were found to result in significantly different surface pressure-area ( -A) isotherms [4]. In spite of this earlier work, molecular conformations of stereoregular PMMA monolayers at different surface pressure have not been studied much.…”

Characterization of poly(2-hydroxyethyl methacrylate) (PHEMA) contact lens using the Langmuir monolayer technique

“…For these calculations an average polymer molecular weight of 200,000 g/ mol (1537 monomers) (data supplied by Polysciences Inc.), was used. The polydispersity was not measured since, according to other authors [8][9][10][11], the molecular weight distribution effect is believed to be minimal on the monolayer behavior.…”

Monolayers of poly(methyl methacrylate) derived from poly(methacrylic anhydride)

“…Previous work h a s described the film balance a ? a useful tool to differentiate atactic, isotactic, syndiotactic, and stereoblock poly(methy1 methacrylate) (1,2). The present study concerns the monomolecular f i l m s or monolayers of a new form of poly(methy1 methacrylate) derived from the cyclopolymer, poly(methacry1ic anhydride).…”