| 摘要 |
We disclose a composition containing a polyester comprising about 1 mole part diol units and from about 0.98 mole parts fumaric acid units to about 1.01 mole parts fumaric acid units. In one embodiment, the diol units are 1,3-propanediol units or 1,2-propanediol units. In one embodiment, the polyester is blended with polylactide. In another embodiment, the composition is in a form selected from the group consisting of a plate, a tray, a bowl, a cup, a bowl lid, a cup lid, a fork, a spoon, a knife, a jewel case, and a packaging article. We also disclose a method of manufacturing the composition. The method includes combining about 1 mole part diol, from about 0.98 mole parts fumaric acid to about 1.01 mole parts fumaric acid, and from about 0.0002 mole parts to about 0.0020 mole parts of a polyesterfication catalyst, to yield a combination of diol and fumaric acid; maintaining the combination of diol and fumaric acid under an inert atmosphere at a temperature from about 130° C. to about 190° C. for at least about 2 hr, to yield a molten combination; maintaining the molten combination under vacuum at a temperature from about 130° C. to about 190° C. for at least about 6 hr, to yield a molten polyester; and cooling the molten polyester, to yield the polyester.
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