Thermoresponsive Poly(2-Oxazoline) Molecular Brushes by Living Ionic Polymerization: Modulation of the Cloud Point by Random and Block Copolymer Pendant Chains

2012 ◽  
Vol 213 (18) ◽  
pp. 1963-1969 ◽  
Author(s):  
Ning Zhang ◽  
Robert Luxenhofer ◽  
Rainer Jordan
Keyword(s):  
Block Copolymer ◽  
Cloud Point ◽  
Molecular Brushes

Synthesis and Morphology of Molecular Brushes with Polyacrylonitrile Block Copolymer Side Chains and Their Conversion into Nanostructured Carbons

2007 ◽  
Vol 40 (17) ◽  
pp. 6199-6205 ◽  
Author(s):  
Chuanbing Tang ◽  
Bruno Dufour ◽  
Tomasz Kowalewski ◽  
Krzysztof Matyjaszewski
Keyword(s):  
Block Copolymer ◽  
Side Chains ◽  
Molecular Brushes ◽  
Nanostructured Carbons

scholarly journals Self-Assembly of Molecular Brushes with Polyimide Backbone and Amphiphilic Block Copolymer Side Chains in Selective Solvents

Polymers ◽  
2020 ◽  
Vol 12 (12) ◽  
pp. 2922
Author(s):  
Maria Simonova ◽  
Ivan Ivanov ◽  
Tamara Meleshko ◽  
Alexey Kopyshev ◽  
Svetlana Santer ◽  
...  
Keyword(s):  
Block Copolymer ◽  
Methyl Methacrylate ◽  
Self Assembly ◽  
Amphiphilic Block Copolymer ◽  
Side Chains ◽  
Poly Methyl Methacrylate ◽  
Molecular Brushes ◽  
Selective Solvents ◽  
Significant Difference ◽  
Thermodynamic Quality

Three-component molecular brushes with a polyimide backbone and amphiphilic block copolymer side chains with different contents of the “inner” hydrophilic (poly(methacrylic acid)) and “outer” hydrophobic (poly(methyl methacrylate)) blocks were synthesized and characterized by molecular hydrodynamics and optics methods in solutions of chloroform, dimethylformamide, tetrahydrofuran and ethanol. The peculiarity of the studied polymers is the amphiphilic structure of the grafted chains. The molar masses of the molecular brushes were determined by static and dynamic light scattering in chloroform in which polymers form molecularly disperse solutions. Spontaneous self-assembly of macromolecules was detected in dimethylformamide, tetrahydrofuran and ethanol. The aggregates size depended on the thermodynamic quality of the solvent as well as on the macromolecular architectural parameters. In dimethylformamide and tetrahydrofuran, the distribution of hydrodynamic radii of aggregates was bimodal, while in ethanol, it was unimodal. Moreover, in ethanol, an increase in the poly(methyl methacrylate) content caused a decrease in the hydrodynamic radius of aggregates. A significant difference in the nature of the blocks included in the brushes determines the selectivity of the used solvents, since their thermodynamic quality with respect to the blocks is different. The macromolecules of the studied graft copolymers tend to self-organization in selective solvents with formation of a core–shell structure with an insoluble solvophobic core surrounded by the solvophilic shell of side chains.

MADIX Thermoresponsive Amphiphilic Block Copolymers as Stimulable Emulsion Stabilizers

2009 ◽  
Vol 62 (11) ◽  
pp. 1488 ◽  
Author(s):  
Mathias Destarac ◽  
Aurélie Papon ◽  
Eric Van Gramberen ◽  
Katerina Karagianni
Keyword(s):  
Block Copolymer ◽  
Block Copolymers ◽  
Cloud Point ◽  
Silicone Oil ◽  
Amphiphilic Block Copolymers ◽  
Solution Temperature ◽  
Water Emulsion ◽  
Critical Solution Temperature ◽  
Oil In Water ◽  
Oil In Water Emulsion

A series of Macromolecular Design by Interchange of Xanthates (MADIX)-derived amphiphilic block copolymers exhibiting lower critical solution temperature behaviour was synthesized and evaluated as silicone oil-in-water emulsion co-stabilizers. It was demonstrated that the cloud point of the block copolymer is mainly controlled by the chemical composition of the N-isopropylacrylamide-based hydrophilic block. The reversible stabilization and destabilization phenomena of the silicone emulsions occurred at a temperature equal to the cloud point of the block copolymer taken alone.

Crystallization of Molecular Brushes with Block Copolymer Side Chains

2009 ◽  
Vol 42 (22) ◽  
pp. 9008-9017 ◽  
Author(s):  
Sherryl Y. Yu-Su ◽  
Sergei S. Sheiko ◽  
Hyung-il Lee ◽  
Wojciech Jakubowski ◽  
Alper Nese ◽  
...  
Keyword(s):  
Block Copolymer ◽  
Side Chains ◽  
Molecular Brushes

Synthesis of Molecular Brushes with Block Copolymer Side Chains Using Atom Transfer Radical Polymerization

2001 ◽  
Vol 34 (13) ◽  
pp. 4375-4383 ◽  
Author(s):  
Hans G. Börner ◽  
Kathryn Beers ◽  
Krzysztof Matyjaszewski ◽  
Sergei S. Sheiko ◽  
Martin Möller
Keyword(s):  
Block Copolymer ◽  
Atom Transfer Radical Polymerization ◽  
Radical Polymerization ◽  
Side Chains ◽  
Atom Transfer ◽  
Molecular Brushes

MACROSCOPIC " SINGLE CRYSTALS " OF AN S-B-S THREE BLOCK COPOLYMER

1971 ◽  
Vol 32 (C5) ◽  
pp. C5a-295-C5a-300
Author(s):  
A. KELLER ◽  
J. DLUGOSZ ◽  
M. J. FOLKES ◽  
E. PEDEMONTE ◽  
F. P. SCALISI ◽  
...  
Keyword(s):  
Block Copolymer ◽  
Single Crystals

Preparation of La-doped TiO$lt;inf$gt;2$lt;/inf$gt; Ultrafiltration Membrane by Templating of Block Copolymer

2015 ◽  
Vol 30 (2) ◽  
pp. 171 ◽  
Author(s):  
CHEN Tao-Tao ◽  
LI Dan ◽  
JING Wen-Heng ◽  
FAN Yi-Qun ◽  
XING Wei-Hong
Keyword(s):  
Block Copolymer ◽  
Ultrafiltration Membrane ◽  
La Doped
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