ONE of the most promising alternatives to plastics made from oil is polylactic acid (PLA).

能够代替石油来制造塑料的最好选择是聚丙醇酸（聚乳酸纤维）。

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Polylactic acid(PLA) and polyglycolic acid(PGA) have been commercially available for human clinical use because of their satisfactory biocompatibility and biodegradation.

有机高分子聚合物聚乳酸、聚乙醇酸具有良好的生物相容性和可降解性，已被广泛应用于临床。

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The of polylactic acid(PLA) was obtained by ring-opening polymerization and the synthesis conditions to get 444,848 molecular weight were optimized.

采用间接开环聚合法合成了平均分子量为444 ，848的聚乳酸，并对合成工艺作了优化。

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This month the site began cranking out the first batches of the polymer, called polylactic acid, or PLA, ready to be used in everything from clothing to carpets to the crinkly, thin films used to wrap candy and compact discs.

FORBES: Shucking Petroleum