Investigations of silicon nano-crystal floating gate memories
Arvind Kumar, Jeffrey J. Welser, et al.
MRS Spring 2000
A general and novel method for the controlled synthesis of aliphatic poly-esters is presented. The evaluation of stannous (II) trifluoromethane sulfonate [Sn(OTf)2] and scandium (III) trifluoromethane sulfonate [Sc(OTf)3] as catalysts for the ring-opening polymerization (ROP) of various lactones is described as a route to polyesters under mild and highly selective polymerization conditions. Size exclusion chromatograms of poly(ε-caprolactone) initiated from ethanol in the presence of either Sn(OTf)2 or Sc(OTf)3 demonstrate the facile synthesis of narrowly dispersed products. Predictable molecular weights, typical of a living or controlled polymerization, were obtained with high yields. These catalysts are versatile and applicable toward the ROP of other cyclic (di)esters, including β-butyrolactone, which produces the synthetic analogue of the biopolymer poly(β-hydroxybutyrate).
Arvind Kumar, Jeffrey J. Welser, et al.
MRS Spring 2000
Frank R. Libsch, Takatoshi Tsujimura
Active Matrix Liquid Crystal Displays Technology and Applications 1997
Gregory Czap, Kyungju Noh, et al.
APS Global Physics Summit 2025
Shiyi Chen, Daniel Martínez, et al.
Physics of Fluids