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Novel poly( l -lactide)/poly( d -lactide)/poly(tetrahydrofuran) multiblock copolymers with a controlled architecture: Synthesis and characterization

2014; Wiley; Volume: 52; Issue: 22 Linguagem: Inglês

10.1002/pola.27389

1099-0518

Lorenza Gardella, Dario Cavallo, Samuele Colonna, Alberto Fina, Orietta Monticelli,

Carbon dioxide utilization in catalysis

Journal of Polymer Science Part A: Polymer ChemistryVolume 52, Issue 22 p. 3269-3282 Article Novel poly(l-lactide)/poly(d-lactide)/poly(tetrahydrofuran) multiblock copolymers with a controlled architecture: Synthesis and characterization Lorenza Gardella, Lorenza Gardella Dipartimento di Chimica e Chimica Industriale, Università di Genova, Via Dodecaneso 31, 16146 Genova, ItalySearch for more papers by this authorDario Cavallo, Dario Cavallo Dipartimento di Chimica e Chimica Industriale, Università di Genova, Via Dodecaneso 31, 16146 Genova, ItalySearch for more papers by this authorSamuele Colonna, Samuele Colonna Dipartimento di Scienza Applicata e Tecnologia, Politecnico di Torino-sede di Alessandria, viale Teresa Michel 5, 15121 Alessandria, ItalySearch for more papers by this authorAlberto Fina, Alberto Fina Dipartimento di Scienza Applicata e Tecnologia, Politecnico di Torino-sede di Alessandria, viale Teresa Michel 5, 15121 Alessandria, ItalySearch for more papers by this authorOrietta Monticelli, Corresponding Author Orietta Monticelli Dipartimento di Chimica e Chimica Industriale, Università di Genova, Via Dodecaneso 31, 16146 Genova, ItalyCorrespondence to: O. Monticelli (E-mail: orietta.monticelli@unige.it)Search for more papers by this author Lorenza Gardella, Lorenza Gardella Dipartimento di Chimica e Chimica Industriale, Università di Genova, Via Dodecaneso 31, 16146 Genova, ItalySearch for more papers by this authorDario Cavallo, Dario Cavallo Dipartimento di Chimica e Chimica Industriale, Università di Genova, Via Dodecaneso 31, 16146 Genova, ItalySearch for more papers by this authorSamuele Colonna, Samuele Colonna Dipartimento di Scienza Applicata e Tecnologia, Politecnico di Torino-sede di Alessandria, viale Teresa Michel 5, 15121 Alessandria, ItalySearch for more papers by this authorAlberto Fina, Alberto Fina Dipartimento di Scienza Applicata e Tecnologia, Politecnico di Torino-sede di Alessandria, viale Teresa Michel 5, 15121 Alessandria, ItalySearch for more papers by this authorOrietta Monticelli, Corresponding Author Orietta Monticelli Dipartimento di Chimica e Chimica Industriale, Università di Genova, Via Dodecaneso 31, 16146 Genova, ItalyCorrespondence to: O. Monticelli (E-mail: orietta.monticelli@unige.it)Search for more papers by this author First published: 19 September 2014 https://doi.org/10.1002/pola.27389Citations: 10Read the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinked InRedditWechat ABSTRACT Novel poly(l-lactide) (PLLA)/poly(d-lactide) (PDLA)/poly(tetrahydrofuran) (PTHF) multiblock copolymers with designed molecular structure were synthesized by a two-stage procedure. Well-defined PDLA-PLLA-PTHF-PLLA-PDLA pentablock copolymers were prepared by sequential ring opening polymerization of l- and d-lactides starting from PTHF glycol, with the length of the (equimolar) PLLA and PDLA blocks being varied. Then, these dihydroxyl-terminated pentamers were transformed into multiblock copolymers by melt chain-extension with hexamethylene diisocyanate–being the first time that the coupling of pentablock units is reported. The successful formation of macromolecular chains with a multiblock and well-defined architecture was demonstrated by 1H NMR spectroscopy. The thermal properties and structuring of the resulting materials were investigated by means of DSC and WAXD measurements and DMA analysis. Stereocomplexation was found to be promoted during solution and melt crystallization. This approach affords materials combining the high rigidity and strength (other than improved thermal resistance) of the hard stereocomplex crystallites with the flexibility imparted by the soft block, whereby their properties can be finely tailored through the composition of the basic pentablock units without limitations on the final molecular weight. The adopted reaction conditions make this process highly appealing in view of the possibility to perform it in extruder. © 2014 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2014, 52, 3269–3282 Citing Literature Supporting Information Additional Supporting Information may be found in the online version of this article. Filename Description pola27389-sup-0001-suppinfofigS1.tif58.4 KB Supplementary Information pola27389-sup-0002-suppinfofigS2.tif29.3 KB Supplementary Information pola27389-sup-0003-suppinfofigS3.tif27.9 KB Supplementary Information pola27389-sup-0004-suppinfotabS1.docx17.1 KB Supplementary Information pola27389-sup-0005-suppinfo01.docx1.7 MB Supplementary Information Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article. Volume52, Issue2215 November 2014Pages 3269-3282 RelatedInformation