Citation: Chang Ming DONG, Kun Yuan QIU, Zhong Wei GU, Xin De FENG. Measurement of Monomer Reactivity Ratios of D,L-3-Methylglycolide with Glycolide or D,L-Lactide[J]. Chinese Chemical Letters, ;2000, 11(9): 815-818.
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For monomer reactivity ratios study, the copolymerization of D, L-3-methylglycolide (MG) with glycolide (GA) or D,L-lactide (LA) was carried out in bulk to a certain low conversion in the presence of stannous octoate at 140℃.The copolymer compositions were determined by 1H NMR spectroscopy.The monomer reactivity ratios were evaluated by Fineman-Ross method, Kelen-Tüdös method and linear least-squares method.The monomer reactivity ratios of D,L-3-methylglycolide and glycolide or D,L-lactide are rmg=0.73, rga=1.47; rmg=1.71, rla=0.92, respectively.
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