Publications by authors named "Mi Ryu Lee"
Article Synopsis
- Polylactic acid (PLA), a biodegradable material made from renewable sources, faces challenges due to its brittleness, which limits its applications.
- Researchers synthesized a range of biodegradable organic carbonates as plasticizers to enhance PLA's ductility, particularly noting the effectiveness of compound 1, which improved compatibility with PLA without losing morphological stability over time.
- Despite the promising enhancements in flexibility and compatibility with PLA, blending these organic carbonate plasticizers did not significantly increase PLA's biodegradability under ambient conditions.
Reevaluating the composition of the double metal cyanide catalyst (DMC) as a salt of (NC)Co anions with 1:1 Zn/(X)Zn cations (X = Cl, RO, AcO), we prepared a series of well-defined DMCs, [ClZn][Zn][(NC)Co][ROH], [(RO)Zn][Zn][(NC)Co], [(AcO)Zn][Zn][(NC)Co], [(RO)Zn][ClZn][Zn][(NC)Co], [(AcO)Zn][(tBuO)Zn][Zn][(NC)Co], and [(AcO)Zn][(tBuO)Zn][ClZn][Zn][(NC)Co]. The structure of [(MeOCHO)Zn][Zn][(NC)Co] was precisely determined at the atomic level through Rietveld refinement of the synchrotron X-ray powder diffraction data. By evaluating the catalyst's performance in both propylene oxide (PO) polymerization and PO/CO copolymerization, a correlation between structure and performance was established on various aspects including activity, dispersity, unsaturation level, and carbonate fraction in the resulting polyols.
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