Interplay of thermosensitivity and pH sensitivity of amphiphilic block-gradient copolymers of dimethylaminoethyl acrylate and styrene
Identifikátory výsledku
Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389013%3A_____%2F18%3A00491337" target="_blank" >RIV/61389013:_____/18:00491337 - isvavai.cz</a>
Výsledek na webu
<a href="http://dx.doi.org/10.1021/acs.macromol.8b00621" target="_blank" >http://dx.doi.org/10.1021/acs.macromol.8b00621</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1021/acs.macromol.8b00621" target="_blank" >10.1021/acs.macromol.8b00621</a>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
Interplay of thermosensitivity and pH sensitivity of amphiphilic block-gradient copolymers of dimethylaminoethyl acrylate and styrene
Popis výsledku v původním jazyce
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.
Název v anglickém jazyce
Interplay of thermosensitivity and pH sensitivity of amphiphilic block-gradient copolymers of dimethylaminoethyl acrylate and styrene
Popis výsledku anglicky
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.
Klasifikace
Druh
J<sub>imp</sub> - Článek v periodiku v databázi Web of Science
CEP obor
—
OECD FORD obor
10404 - Polymer science
Návaznosti výsledku
Projekt
Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.
Návaznosti
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Ostatní
Rok uplatnění
2018
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název periodika
Macromolecules
ISSN
0024-9297
e-ISSN
—
Svazek periodika
51
Číslo periodika v rámci svazku
14
Stát vydavatele periodika
US - Spojené státy americké
Počet stran výsledku
15
Strana od-do
5219-5233
Kód UT WoS článku
000440105200022
EID výsledku v databázi Scopus
2-s2.0-85050688894