2026-04-17T04:00:57Zhttps://recercat.cat/oai/request

oai:recercat.cat:2117/1218532026-02-07T06:51:21Zcom_2072_1033col_2072_452950

Metal-free catalyzed ring-opening polymerization and block copolymerization of ¿-pentadecalactone using amino-ended initiators Tinajero, Ernesto Martínez de Ilarduya Sáez de Asteasu, Domingo Antxon Muñoz Guerra, Sebastián de Paz, Maria Viola Galbis Fuster, Elsa Àrees temàtiques de la UPC::Enginyeria química Nanocomposites (Materials) Polyesters Polymerization Macrolactones polymerization Amphiphilic block copolymers Enzymatic ring-opening polymerization Polyethyleneglycol-polyester copolymers Amphiphilic block copolymer nanoparticles Nanocompòsits (Materials) Poliester Polimerització Metal-free catalysis was successfully applied to polymerize ¿-pentadecalactone (PDL) by ring-opening polymerization (ROP) using several amino-ended initiators, namely hexylamine, allylamine and O,O'-bis(3-aminopropyl)diethylene glycol. This polymerization method was suitable to prepare telechelic polyesters carrying functional-end groups. The technique was then extended to the synthesis of block copolymers by ROP of PDL using bisamino-ended poly(ethylene glycol) (Mn¿=¿2600) as macroinitiator. PPDLx-PEG56-PPDLx triblock copolymers with Mn ranging between ~4000 and ~90,000¿g¿·mol-1 were synthesized and extensively characterized by NMR, DSC, TGA and XRD. The amphiphilic copolymers thus produced were demonstrated to be able to self-assemble in nanoparticles with average diameters of ~100–200¿nm and morphologies highly depending on blocks lengths. The described synthetic route distinguishes in providing “clean” amphiphilic copolymers, which are attractive candidates for biomedical applications. Peer Reviewed Postprint (author's final draft) 2018-11-01 Article https://www.sciencedirect.com/science/article/pii/S0014305718312357 info:eu-repo/grantAgreement/MINECO/1PE/MAT2016-77345-C3-1-P http://creativecommons.org/licenses/by-nc-nd/3.0/es/ Open Access Attribution-NonCommercial-NoDerivs 3.0 Spain Elsevier