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- W2009667031 endingPage "1441" @default.
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- W2009667031 abstract "In this article, we cover the development of L-lactide (L-LA) random copolymers into which useful compounds, such as repellents and antibacterial agents, were impregnated by high concentration. Outstanding controlled release materials were developed with statis- tical random copolymers of L-LA with cyclic carbonate (CC) (2,2-dimethyltrimethylene carbonate (2,2-DTMC) or tetramethylene carbonate (TEMC)) with tin 2-ethyL-hexa- noate as a catalyst at 150 � C (2,2-DTMC) or 120 � C (TEMC) for 24 h without solvent. The preparation of improved controlled release materials was performed with useful organic compounds with low boiling points and synthetic L-LA random copolymers containing CCs as base materi- als under supercritical carbon dioxide (scCO2). Low-boil- ing-point compounds, such as d-limonene and hinokitiol, were used. In impregnation experiments with scCO2, the amounts of low-boiling-point compounds increased with increasings L-LA content. The compound content impreg- nated into poly(L-lactide-ran-cyclic carbonate) (poly(L-LA- ran-CC)) was greater than that of the experiment with poly(L-lactide-ran-e-caprolactone) previously studied. When the enzymatic degradation of poly(L-LA-ran-CC) was performed with proteinase K, copolymers with a greater L-LA content degraded more rapidly than did copolymers with a greater CC content. In a controlled release experiment with poly(L-lactide-ran-2,2-dimethyltri- methylene carbonate) (76/24) or poly(L-lactide-ran-tetra- methylene carbonate) (81/19), the rate of polymer degradation and the rate of impregnated compound release were almost the same. V C 2011 Wiley Periodicals, Inc. J Appl Polym Sci 121: 1431-1441, 2011" @default.
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- W2009667031 date "2011-03-03" @default.
- W2009667031 modified "2023-10-16" @default.
- W2009667031 title "Impregnation of poly(L-lactide-ran-cyclic carbonate) copolymers with useful compounds with supercritical carbon dioxide" @default.
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- W2009667031 doi "https://doi.org/10.1002/app.33646" @default.
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