Why is there no clear glass transition of confined water?

► Glycerol-water mixtures confined in MCM-41 C10 have been studied by DSC experiments. ► A strong decrease of Tg, compared to bulk, was observed for glycerol. ► Tg is almost concentration independent, in contrast to the bulk system. ► The findings suggest a micro-phase separation of glycerol and water. ► The confined water exhibits no evident Tg.