I&EC 26 |
| Polylactides have become important thermoplastic material for applications ranging from fibers to packaging materials. The L-lactic acid used to prepare polylactide is derived from corn. We have been interested in exploring other sources of α-hydroxy acids that would lead to renewable materials that have physical properties different from polylactides. In particular, we have prepared a family of alkyl-substituted polylactides that ultimately can be obtained from saturated fatty acids. These polymers have a comb-like structure and low glass transition temperatures. Interestingly, the long alkyl chains induce side chain crystallization with melting points near room temperature, suggesting potential applications as breathable packaging materials. Another class of monomers has an aromatic or saturated cycloalkyl ring is a part of their structure. Their polymers resemble polystyrene, both in terms of their chemical structure, glass transition temperatures, and their mechanical properties. |
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Feedstocks for the Future II: Renewables for the Production of Chemicals and Materials
8:30 AM-12:00 PM, Tuesday, August 21, 2007 Boston Park Plaza -- Clarendon Rm, Oral
Division of Industrial & Engineering Chemistry |