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Synthesis and Microstructural Characterization of Ethylene Carbonate−ε-Caprolactone/l-Lactide Copolymers Using One- and Two-Dimensional NMR Spectroscopy

Title data

Agarwal, Seema ; Naumann, Niels ; Xie, Xiulan:
Synthesis and Microstructural Characterization of Ethylene Carbonate−ε-Caprolactone/l-Lactide Copolymers Using One- and Two-Dimensional NMR Spectroscopy.
In: Macromolecules. Vol. 35 (24 September 2002) Issue 20 . - pp. 7713-7717.
ISSN 0024-9297
DOI: https://doi.org/10.1021/ma020584k

Official URL: Volltext

Abstract in another language

Copolymers containing ethylene carbonate (EC) and ε-caprolactone (CL)/l-lactide (LA) units of different compositions were synthesized by the ring-opening polymerization method using the SmI2/Sm initiator system. EC was non-homopolymerizable using the same initiator. A maximum of 19 mol % EC was incorporated into the polycaprolactone backbone. The microstructure of these copolymers was analyzed by one- and two-dimensional NMR spectroscopies. The triad sequence distribution centered at CL has been obtained from 13C NMR spectroscopy. 2D 1H−13C HMQC (heteronuclear multiple-quantum correlation) and HMBC (heteronuclear multiple-bond correlation) spectra were used to confirm the existence of EC as isolated units and CL/LA in the blocks. The complete and correct assignment of peaks in the 13C NMR spectrum of previously reported EC−CL copolymers is also done on the basis of 1H−13C HMQC and HMBC spectroscopic techniques.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: RING-OPENING POLYMERIZATION; ORGANOLANTHANIDE COMPLEXES; DELTA-VALEROLACTONE; GAMMA-BUTYROLACTONE; SAMARIUM COMPLEXES; POLAR MONOMERS; LACTONES; BIODEGRADABILITY; DERIVATIVES; INITIATORS
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Macromolecular Chemistry II
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Macromolecular Chemistry II > Chair Macromolecular Chemistry II - Univ.-Prof. Dr. Andreas Greiner
Profile Fields > Advanced Fields > Polymer and Colloid Science
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry
Profile Fields
Profile Fields > Advanced Fields
Result of work at the UBT: No
DDC Subjects: 500 Science > 540 Chemistry
Date Deposited: 07 Apr 2015 11:38
Last Modified: 07 Apr 2015 11:38
URI: https://eref.uni-bayreuth.de/id/eprint/9909