| Tough Blends of Polylactide and Castor Oil. | |
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MedLine Citation:
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PMID: 21823623 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Poly(l-lactide) (PLLA) is a renewable resource polymer derived from plant sugars with several commercial applications. Broader implementation of the material is limited due to its inherent brittleness. We show that the addition of 5 wt % castor oil to PLLA significantly enhances the overall tensile toughness with minimal reductions in the modulus and no plasticization of the PLLA matrix. In addition, we used poly(ricinoleic acid)-PLLA diblock copolymers, synthesized entirely from renewable resources, as compatibilizers for the PLLA/castor oil blends. Ricinoleic acid, the majority fatty acid comprising castor oil, was polymerized through a lipase catalyzed condensation reaction. The resulting polymers contained a hydroxyl end-group that was subsequently used to initiate the ring-opening polymerization of l-lactide. The binary PLLA/castor oil blend exhibited a tensile toughness seven times greater than neat PLLA. The addition of block copolymer allowed for control over the morphology of the blends, and even further improvement in the tensile toughness was realized-an order of magnitude larger than that of neat PLLA. |
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Authors:
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Megan L Robertson; Jessica M Paxton; Marc A Hillmyer |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-8-8 |
Journal Detail:
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Title: ACS applied materials & interfaces Volume: - ISSN: 1944-8252 ISO Abbreviation: - Publication Date: 2011 Aug |
Date Detail:
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Created Date: 2011-8-9 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101504991 Medline TA: ACS Appl Mater Interfaces Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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Department of Chemistry, University of Minnesota , 207 Pleasant St. SE, Minneapolis, Minnesota 55455-0431, United States. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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