| Dehydration Polycondensation of Dicarboxylic Acids and Diols Using Sublimating Strong Brønsted Acids. | |
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MedLine Citation:
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PMID: 22533475 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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We investigated catalytic activities of strong brønsted acids for dehydration polycondensations of dicarboxylic acids and diols, which were carried out at low temperature (< 100 °C) under reduced pressure (0.3-3 mmHg). Strong brønsted acids, bis(parfluoroalkanesulfonyl)imide and parfluoroalkanesulfonic acid, showed higher activity than p-toluenesulfonic acid (PTSA) or rare-earth catalysts at 60 °C. Especially, Bis(nonafluorobutanesulfonyl)imide (Nf2NH) showed the highest activity to synthesize not only aliphatic polyester (Mn > 19000) but also aromatic polyester (Mn > 7000). The used Nf2NH was sublimated from the reaction flask during polycondensation and the sublimate, Nf2NH, was extra pure so that we can reuse the catalyst without loss of the activity in the dehydration polycondensations. |
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Authors:
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Takaya Moyori; Tang Tang; Akinori Takasu |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2012-4-26 |
Journal Detail:
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Title: Biomacromolecules Volume: - ISSN: 1526-4602 ISO Abbreviation: - Publication Date: 2012 Apr |
Date Detail:
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Created Date: 2012-4-26 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 100892849 Medline TA: Biomacromolecules Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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