期刊
MACROMOLECULAR RAPID COMMUNICATIONS
卷 39, 期 12, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/marc.201700865
关键词
biobased polymers; high T-g; modified glycolides; polyglycolides (PGL); polylactides (PLA)
In this study, poly(mandelate-co-glycolate) (PMG), a modified polyglycolide (PGL), is prepared by ring-opening polymerization (ROP) of L-3-phenyl-1,4-dioxane-2,5-dione (PDD); the cyclic dimer of biobased mandelic acid and glycolic acid. The resulting polymer shows an increased glass transition temperature (T-g) due to the incorporation of phenyl groups in the chain. High molecular weight PMG is obtained by bulk ROP at 150 degrees C, and it exhibits a glassy amorphous state with enhanced thermal properties such as a T-g being 35 degrees C higher than conventional PGL. PDD is also copolymerized with glycolide (GL) and lactide (LA), resulting in poly(mandelate-co-glycolate/glycolate) ((P(MG/GL)) with GL and poly(mandelate-co-glycolate/lactide) ((P(MG/LA)) with LA. The thermal properties of P(MG/GL) and P(MG/LA) are found to be distinctly different from PMG and conventional PGL and polylactide, and they are tunable with a changing molar ratio of PDD, GL, and LA. Therefore, PDD opens an elegant way to control and tailor the properties of biobased polyesters.
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