Polycondensation of lactic acid catalyzed by organic acid anhydrides |
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| Authors: | Yanbin Bai Ziqing Lei |
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| Affiliation: | 1. Key Laboratory of Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China;2. Key Laboratory of Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, ChinaKey Laboratory of Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University Lanzhou 730070, China |
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| Abstract: | Poly(lactic acid) was prepared by the utilization of the acid anhydrides cis‐butenedoic anhydride, phthalic anhydride and pyromellitic dianhydride as catalysts. The effect of the amount of catalyst, temperature and reaction time on the polymerization was investigated in detail. The results show that the acid anhydride catalysts are very efficient in bulk polycondensation, giving poly(D ,L ‐lactic acid) with average molecular weights (Mw) of (1.7–2.3) × 104 in high yield. Copyright © 2007 Society of Chemical Industry |
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| Keywords: | poly(lactic acid) polycondensation acetic anhydride |
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