Transforming Polylactide into Value-Added Materials
Transforming Polylactide into Value-Added Materials
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DOI：
10.1002/pola.26303
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发表时间：
2012-12-01
影响因子：
--
通讯作者：
Shand, Justin D.
中科院分区：
文献类型：
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作者：
Leibfarth, Frank A.;Moreno, Nicholas;Shand, Justin D.
从生物可再生和可持续的资源生产化学结构单元和聚合物前体是一种有吸引力的方法，可以绕过传统的化石燃料衍生材料。因此，我们报告的有机催化回收消费后的聚乳酸（PLA）到增值的小分子。这种策略，使用高活性的酯交换催化剂三氮杂双环癸烯，被证明是完全deepesterone的PLA在各种醇的存在下成有价值的乳酸酯。使用先前使用的PLA包装材料，解聚在室温下在几分钟内完成，并完全保留乳酸盐物质的立体化学。此外，这种方法的模块化和实用性相对于聚酯基板详细通过使用各种功能性醇去聚乳酸和聚乙交酯，与相应的酯小分子被用来制造新的聚合物材料。通过简单和多功能的化学方法将废物流转化为增值化学品和新材料的机会，具有延长可再生化学原料生命周期的巨大潜力。(C)2012 Wiley Periodicals，Inc.聚合物科学杂志A部分：聚合物化学50：4814-4822，2012
The production of chemical building blocks and polymer precursors from biorenewable and sustainable resources is an attractive method to bypass traditional fossil fuel derived materials. Accordingly, we report the organocatalytic recycling of postconsumer polylactide (PLA) into value-added small molecules. This strategy, using the highly active transesterification catalyst triazabicyclodecene, is shown to completely depolymerize PLA in the presence of various alcohols into valuable lactate esters. Using previously used PLA packaging material, the depolymerization is complete in minutes at room temperature and fully retains the stereochemistry of the lactate species. Further, the modularity and utility of this methodology with respect to polyester substrate is detailed by using a variety of functional alcohols to depolymerize both PLA and polyglycolide, with the corresponding ester small-molecules being used to make new polymeric materials. The opportunities to transform waste streams into value-added chemicals and new materials through simple and versatile chemistry hold significant potential to extend the lifecycle of renewable chemical feedstocks. (C) 2012 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 50: 4814-4822, 2012