Počet záznamů: 1
Interplay of thermosensitivity and pH sensitivity of amphiphilic block-gradient copolymers of dimethylaminoethyl acrylate and styrene
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SYSNO ASEP 0491337 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Interplay of thermosensitivity and pH sensitivity of amphiphilic block-gradient copolymers of dimethylaminoethyl acrylate and styrene Tvůrce(i) Rabyk, Mariia (UMCH-V) RID, ORCID
Destephen, A. (FR)
Lapp, A. (FR)
King, S. (GB)
Noirez, L. (FR)
Billon, L. (FR)
Hrubý, Martin (UMCH-V) RID, ORCID
Borisov, O. (FR)
Štěpánek, Petr (UMCH-V) RID, ORCID
Deniau, E. (FR)Zdroj.dok. Macromolecules. - : American Chemical Society - ISSN 0024-9297
Roč. 51, č. 14 (2018), s. 5219-5233Poč.str. 15 s. Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova amphiphilic diblock copolymers ; pH and thermoresponsive Vědní obor RIV CD - Makromolekulární chemie Obor OECD Polymer science CEP GA16-03156S GA ČR - Grantová agentura ČR LM2015064 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy 7AMB17FR032 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy Institucionální podpora UMCH-V - RVO:61389013 UT WOS 000440105200022 EID SCOPUS 85050688894 DOI 10.1021/acs.macromol.8b00621 Anotace Novel pH- and thermoresponsive amphiphilic diblock copolymer, comprising hydrophilic poly(2-dimethylaminoethyl acrylate) (PDMAEA) and amphiphilic poly(styrene-grad-2-dimethylaminoethyl acrylate) (P(S-grad-DMAEA)) blocks, was synthesized by nitroxide-mediated radical polymerization. A series of copolymers (PS-grad-PDMAEA) with controlled molar masses and low dispersities over a wide range of monomer feed ratios (0 < fS,0 < 1) were synthesized. Both conventional linearization and nonlinear least-squares methods were applied to estimate reliable values of the reactivity ratios for S and DMAEA radical polymerization. The calculated values of the reactivity ratios (rDMAEA = 0.25 and rS = 1.15) perfectly fitted the drift in monomer feed ratio versus conversion, showing a gradient distribution along the copolymer chains. The self-assembling behavior of the copolymers in the aqueous medium was investigated by dynamic light scattering and small-angle neutron scattering over a wide range of pH, temperature, and salt concentration. These block-gradient copolymers show reversible self-association into micelle-like structure (Dh ∼ 20 nm) in aqueous solutions triggered by both pH and temperature. Pracoviště Ústav makromolekulární chemie Kontakt Eva Čechová, cechova@imc.cas.cz ; Tel.: 296 809 358 Rok sběru 2019
Počet záznamů: 1