Medium-chain-length polyhydroxyalkanoic acids (PHA mcl) produced by Pseudomonas putida IPT 046 from renewable sources

Medium-chain-length polyhydroxyalkanoates are produced by Pseudomonas putida strain IPT046 growing on carbohydrates. Analysis by gas chromatography and nuclear magnetic resonance of the elastomeric material revealed that PHA mcl is composed from essentially hydroxydecanoate (60–70%) and hydroxyoctan...

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Bibliographic Details
Published in:European polymer journal 2003-07, Vol.39 (7), p.1385-1394
Main Authors: Sánchez, Rubén J, Schripsema, Jan, da Silva, Luziana F, Taciro, Marilda K, Pradella, Jose G.C, Gomez, J.Gregório C
Format: Article
Language:English
Subjects:
Applied sciences
Biodegradable polyester
Elastomers
Exact sciences and technology
Medium-chain-length polyhydroxyalkanoates
Organic polymers
Physicochemistry of polymers
Polymerization
Preparation, kinetics, thermodynamics, mechanism and catalysts
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Summary:Medium-chain-length polyhydroxyalkanoates are produced by Pseudomonas putida strain IPT046 growing on carbohydrates. Analysis by gas chromatography and nuclear magnetic resonance of the elastomeric material revealed that PHA mcl is composed from essentially hydroxydecanoate (60–70%) and hydroxyoctanoate (20–25%) sequence units with a non-terminal double bond in about 6% of the side chains. The average molecular weight of PHA mcl is 223 kDalton and the X-ray diffractogram showed that 24% of the solid phase is crystalline. This biodegradable polyester presents a relative low glass transition temperature (−39.7 °C) and melting point (56 °C), is thermically stable (234 °C) and displays appropriate thermomechanical properties for potential use as packaging film.
ISSN:0014-3057
1873-1945
DOI:10.1016/S0014-3057(03)00019-3