| Readily controllable step-growth polymerization method for poly(lactic acid) copolymers having a high glass transition temperature. | |
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MedLine Citation:
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PMID: 20345130 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Poly(lactic acid) (PLA) copolymers having a significantly higher glass transition temperature (T(g)) than that of high molar mass PLA homopolymers (typically 60 +/- 5 degrees C) were prepared. Lactic acid was copolymerized with 1,4:3,6-dianhydro-D-glucitol (isosorbide, ISB) and succinic acid (SA-2), 1,2,3,4-butanetetracarboxylic acid (BTCA-4) or 1,2,3,4,5,6-cyclohexanehexacarboxylic acid (HCA-6). The highest T(g)s obtained for the copolymers containing BTCA-4 and HCA-6 were 80 and 86 degrees C, respectively. The polymers were prepared by step-growth polymerization in the melt phase, which is an easily operable and simple PLA production method in comparison to the ring-opening polymerization (ROP) route. It was shown that the T(g) and the cross-linking induced by the polyfunctional carboxylic acid comonomers could be readily controlled by choosing a suitable polymerization time and temperature. Similar improvement in the T(g) as achieved for the copolymers of BTCA-4 and HCA-6 was not observed for linear copolymers containing ISB and SA-2. |
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Authors:
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Saara Inkinen; Mikael Stolt; Anders Södergård |
Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Biomacromolecules Volume: 11 ISSN: 1526-4602 ISO Abbreviation: Biomacromolecules Publication Date: 2010 May |
Date Detail:
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Created Date: 2010-05-10 Completed Date: 2010-08-16 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 100892849 Medline TA: Biomacromolecules Country: United States |
Other Details:
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Languages: eng Pagination: 1196-201 Citation Subset: IM |
Affiliation:
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Tate and Lyle Finland Oy, FIN-20520 Turku, Finland. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Hot Temperature* Lactic Acid / chemistry* Magnetic Resonance Spectroscopy Polymers / chemistry* |
| Chemical | |
Reg. No./Substance:
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0/Polymers; 26100-51-6/poly(lactic acid); 50-21-5/Lactic Acid |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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