Abstract
The i.r. and Raman spectra of glycolide, L-lactide and D,L-lactide in the solid state have been investigated in the 4000-100 cm −1 range. An assignment of the fundamental vibrations is given. The Raman spectra of aqueous solutions of these cyclic diesters showed ring-opening and the beginning of polymerization, characterized by the appearance of ester group bands and acid and alcohol end-group bands.
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