期刊
CCS CHEMISTRY
卷 4, 期 4, 页码 1337-1346出版社
CHINESE CHEMICAL SOC
DOI: 10.31635/ccschem.021.202101011
关键词
polymer vesicles; stereoregular polymerization; green chemistry; isotactic PMMA; hyperbranched polymers
资金
- National Natural Science Foundation of China [21890730, 21890733, 51773115]
- Program for Basic Research of Shanghai Science and Technology Commission [19JC1410400]
This paper reports for the first time on a vesicular catalysis method for the green stereoregular polymerization of isotactic-rich PMMA in water and at ambient temperature and pressure. The isotactic degree of the as-prepared PMMAs increases with the decrease of vesicle size, and this work represents a new application of polymer vesicles in stereoregular polymerization.
Stereoselective polymerization can yield polymers with specific tacticity and properties, and it is an essential topic throughout polymer synthesis history. Herein, we report for the first time on a vesicular catalysis method to realize the green stereoregular polymerization of isotactic-rich poly(methyl methacrylate) (PMMA) in water and at ambient temperature and pressure, namely by conducting the polymerization of MMA monomers in the confined 5-10 nm thick hydrophobic layers of hyperbranched polymer vesicles. The isotactic degree of the as-prepared PMMAs increases from 12% to 40% with the decrease of vesicle size from 840 to 85 nm in hydrodynamic diameter (Dh) due to the conformation confinement effect of MMA monomers inside the thin vesicle membranes through a curvature-dependent way. The present work has extended the scope of green chemistry, and it also represents a new application of polymer vesicles in stereoregular polymerization. [GRAPHICS] .
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