Preparation of uniform stereoregular polymer, stereoblock polymer and copolymer of methacrylate, and their stereocomplex formation

Isotactic (it‐) and syndiotactic (st‐) uniform poly(methyl methacrylate)s (PMMAs) were prepared by stereospecific living polymerizations followed by supercritical fluid chromatographic separation. The it‐and st‐uniform PMMAs were used to study the mechanism of stereo‐complex formation in solution with the aid of gel permeation chromatography and 1H NMR spectroscopy. The it‐ and st‐uniform PMMAs with hydroxy end‐group were prepared and reacted with sebacoyl dichloride to form uniform stereoblock PMMA. The stereoblock PMMA was found to form intra‐ and intermolecular stereocomplexes in acetone. A uniform stereoblock copolymer, it‐PMMA‐block‐st‐poly(ethyl methacrylate), was prepared and its stereocomplex formation was also studied.