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- W2314894402 abstract "The synthesis of star-shaped polylactides (PLAs) having both poly(l-lactide) (PLLA) and poly(d-lactide) (PDLA) arms in one molecule, i.e., stereo-miktoarm star-shaped PLAs, is described. The azido-functionalized PDLAs and ethynyl-functionalized PLLA possessing linear and two- and three-branched structures were prepared by the ring-opening polymerization of d-lactide and l-lactide using azido- or ethynyl-functionalized initiators. The number-average molecular weights (Mn,NMRs) of the PLAs were ca. 5000 g mol–1 with narrow molecular weight distributions (Mw/Mns) of less than 1.18. The click reaction of the azido-functionalized PDLAs and the ethynyl-functionalized PLLAs using the copper(I) bromide/N,N,N′,N″,N″-pentamethyldiethylenetriamine catalyst in a mixed solvent of dichloromethane/1,1,1,3,3,3-hexafluoro-2-propanol (14/1, v/v) gave a linear stereoblock PLA as well as 3-, 4-, 5-, and 6-armed stereo-miktoarm star-shaped PLAs with Mn,NMRs of ca. 10 000 g mol–1 and Mw/Mns of less than 1.16. The wide-angle X-ray scattering and differential scanning calorimetry measurements proved that these stereo-miktoarm star-shaped PLAs formed stereocomplex crystals without any trace of homochiral crystallization." @default.
- W2314894402 created "2016-06-24" @default.
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- W2314894402 date "2013-10-22" @default.
- W2314894402 modified "2023-10-16" @default.
- W2314894402 title "Synthesis and Stereocomplex Formation of Star-Shaped Stereoblock Polylactides Consisting of Poly(<scp>l</scp>-lactide) and Poly(<scp>d</scp>-lactide) Arms" @default.
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- W2314894402 doi "https://doi.org/10.1021/ma401375x" @default.
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