Ring-Expansion Polymerization of Glycolide catalyzed by 2,2-Dibutyl-2-stanna-1,3 oxathiolane or 2,2-Dibutyl-2-stanna-1,3-dioxolane

This data set contains all raw data that are associated with a publication in Polymer Chemistry (RSC). This paper describes the polymerization of glycolide using two catalysts (DSOL and SDOL) and the characterization of synthesized polymers by Size Exclusion Chromatography (SEC), Matrixassisted Laser Desorption/Ionisation Time of flight (MALDI TOF) mass spectrometry and Differential Scanning Calorimetry (DSC). REPs catalyzed by DSOL and SDOL have in common the formation of cyclic PGAs at temperatures as low as 100°C, which can be used for bulk polymerization. The formation of cyclic PGAs begins as a rapid equilibration reaction in the melt. The crystallization of cyclic PGAs in a stable crystal lattice with antiparallel chain alignment favors nearly complete elimination of the catalyst from the initially formed ghPGAs. Both catalysts yield cyclic PGAs with Mn values ranging from 7 000 to 27 000 g mol-1, bridging the gap between higher- and lower-mass cyclic PGAs accessible by REP with other cyclic catalysts.