کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5202190 | 1381890 | 2013 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Methanolysis of poly(lactic acid) (PLA) catalyzed by ionic liquids Methanolysis of poly(lactic acid) (PLA) catalyzed by ionic liquids](/preview/png/5202190.png)
Poly(lactic acid) (PLA) was depolymerized by methanol in the presence of a novel catalyst: ionic liquids. It was found that the purification method of the main products in the methanolysis catalyzed by ionic liquids was simpler than that of traditional compounds, such as sulfuric acid. Qualitative analysis indicated that the main product in the methanolysis process was methyl lactate. The influences of experimental parameters, such as the amount of ionic liquids, methanolysis time, reaction temperature, and dosages of methanol on the conversion of PLA, yield of methyl lactate were investigated. Under the optimum conditions, using ionic liquid 1-butyl-3-methylimidazolium acetate ([Bmim][Ac]) as catalyst, results showed that the ionic liquid could be reused up to 6 times without apparent decrease in the conversion of PLA and yield of methyl lactate. The kinetics of the reaction was also investigated. The results indicated that the methanolysis of PLA was a first-order kinetic reaction with activation energy of 38.29Â kJ/mol. In addition, a possible catalysis mechanism of the methanolysis of PLA was proposed.
Journal: Polymer Degradation and Stability - Volume 98, Issue 12, December 2013, Pages 2760-2764