%0 Journal Article
%T Synthesis and behaviour of PEG-b-PDEAm block copolymers in aqueous solution
%+ Laboratoire de Chimie, Catalyse, Polymères et Procédés, R 5265 (C2P2)
%+ Laboratoire Charles Coulomb (L2C)
%+ Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier (ICGM)
%A Zhang, Xuewei
%A Burton, Tobias, F
%A In, Martin
%A Begu, Sylvie
%A Aubert-Pouëssel, Anne
%A Robin, Jean-Jacques
%A Monge, Sophie
%A Giani, Olivia
%< avec comité de lecture
%@ 2352-4928
%J Materials Today Communications
%I Elsevier
%V 24
%P 100987
%8 2020-09
%D 2020
%R 10.1016/j.mtcomm.2020.100987
%K (N
%K N-diethylacrylamide
%K RAFT
%K thermosensitive polymers
%K behaviour in aqueous solution)
%Z Chemical Sciences
%Z Chemical Sciences/Material chemistryJournal articles
%X Well-defined double hydrophilic block copolymers (DHBCs) of poly(ethylene glycol)-block-poly(N,N-diethyla-crylamide) (PEG-b-PDEAm) were synthesized via a reversible addition-fragmentation chain-transfer (RAFT) polymerization of N,N-diethylacrylamide (DEAm) using dithioester terminated PEG of different chain lengths as macro-chain transfer agents. Controlled molecular weight and narrow molecular weight distribution were achieved as proven by size exclusion chromatography (SEC). Cloud points (CP) were determined via turbidity measurements with ultraviolet-visible spectroscopy (UV-vis) and LCST by differential scanning micro-calori-metry (micro-DSC). They range from 32 to 40°C depending on the PDEAm length block and its concentration. Above the LCST, fluorescence spectroscopy and dynamic light scattering (DLS) demonstrated that the PEG-b-PDEAm copolymers self-organized into large aggregates. More interestingly, copolymers pre-aggregated at relatively high concentrations below the LCST.
%G English
%2 https://hal.science/hal-02507349/document
%2 https://hal.science/hal-02507349/file/GIANI%20%20MTC%202020.pdf
%L hal-02507349
%U https://hal.science/hal-02507349
%~ CNRS
%~ UNIV-LYON1
%~ ENSC-MONTPELLIER
%~ ICG
%~ L2C
%~ INC-CNRS
%~ MIPS
%~ CHIMIE
%~ UNIV-MONTPELLIER
%~ UDL
%~ UNIV-LYON
%~ TEST-HALCNRS
%~ UM-2015-2021
%~ TEST2-HALCNRS