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- W4312038093 abstract "In the present contribution, a new strategy for preparing block copolymers of polylactide (PLA), a bio-derived polymer of increasing importance, is described. The method should lead to multiblock copolymers of lactide with vinyl monomers (VM), i.e., monomers that polymerize according to different mechanisms, and is based on the introduction of multiple inifer (INItiator/transFER agent) groups into PLA's structure. As an inifer group, tetraphenylethane (TPE, known to easily thermally dissociate to radicals) was incorporated into PLA chains using diisocyanate. PLA that contained TPE groups (PLA-PU) was characterized, and its ability to form initiating radicals was demonstrated by ESR measurements. PLA-PU was used as a macroinifer for the polymerization of acrylonitrile and styrene upon moderate heating (85 °C) of the PLA-PU in the presence of monomers. The formation of block copolymers PLA/PVM was confirmed by 1H NMR, DOSY NMR, and FTIR spectroscopies and the SEC method. The prepared copolymers showed only one glass transition in DSC curves with Tg values higher than those of PLA-PU." @default.
- W4312038093 created "2023-01-04" @default.
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- W4312038093 date "2022-12-20" @default.
- W4312038093 modified "2023-10-14" @default.
- W4312038093 title "Functionalization of Polylactide with Multiple Tetraphenyethane Inifer Groups to Form PLA Block Copolymers with Vinyl Monomers" @default.
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- W4312038093 doi "https://doi.org/10.3390/ijms24010019" @default.
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