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Polylactide foams prepared by a traditional chemical compression-molding method



To reduce environmental pollution and oil shortages, biodegradable polylactide (PLA) from plants was used to replace synthetic plastic from petroleum. In this study, high-melt-viscosity PLA was achieved through the in situ reaction of carboxyl-ended polyester (CP) and solid epoxy (SE) first; then, PLA foams were successfully prepared by a chemical compression-molding method. The detailed foaming factors were also studied, including the decomposition temperature of the blowing agent, the foam temperature, and the open-mold temperature. The results reveal that the obtained PLA foams had good water absorption and degradable properties, and the foam density was low as 0.16 g/cm3. Moreover, the effects of the CP/SE concentration and the AC content on the properties of the foams were also investigated. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013

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