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Polymer Bulletin
Erschienen in: Polymer Bulletin 6/2014

01.06.2014 | Original Paper

Synthesis and characterization of star polylactide by ring-opening polymerization of l-lactic acid O-carboxyanhydride

verfasst von: Mingwei Yuan, Zhengguo He, Hongli Li, Lin Jiang, Minglong Yuan

Erschienen in: Polymer Bulletin | Ausgabe 6/2014

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Abstract

Ring-opening polymerization of l-lactic acid O-carboxyanhydride was catalyzed by 4-dimethylaminopyridine in the presence of polyols pentaerythritol (PER) or dipentaerythritol (DPE). A high yield and relatively high molecular weight of 4- or 6-arm star PLA were obtained. The reaction was observed to be conducted easily and controllably. NMR analysis revealed that the end of the star PLA chain is a hydroxyl group and the central core is a PER or DPE group. The crystallinity of star PLA is lower than that of linear PLA. The crystallinity of 4-arm star PLA is lower than that of 6-arm PLA. Compared with that of 4-arm star PLA, the molecular arrangement of 6-arm star PLA may be relatively more regular.
Vorheriger Artikel Rheologically determined phase behavior and miscibility of reactively compatibilized poly(ethylene terephthalate)/polypropylene blends
Nächster Artikel The thermal gravimetric studies for polymer samples of polyvinyl chloride (PVC) and polyvinyl alcohol (PVA) obtained by treatment with ionic liquid [bmim]Br

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Metadaten
Titel
Synthesis and characterization of star polylactide by ring-opening polymerization of l-lactic acid O-carboxyanhydride
verfasst von
Mingwei Yuan
Zhengguo He
Hongli Li
Lin Jiang
Minglong Yuan
Publikationsdatum
01.06.2014
Verlag
Springer Berlin Heidelberg
Erschienen in
Polymer Bulletin / Ausgabe 6/2014
Print ISSN: 0170-0839
Elektronische ISSN: 1436-2449
DOI
https://doi.org/10.1007/s00289-014-1125-2

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