scholarly journals Reflectivity Studies on Adsorbed Block Copolymers Under Shear

1994 ◽  
Vol 376 ◽  
Author(s):  
Gregory S. Smith ◽  
Stephen Wages ◽  
Shenda M. Baker ◽  
Chris Toprakcioglu ◽  
George Hadziioannou
Keyword(s):  
Diblock Copolymers ◽  
Quartz Substrate ◽  
Neutron Reflectivity ◽  
Shear Rates ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene ◽  
Reflectivity Data ◽  
Static Conditions ◽  
Anchor Block ◽  
Poor Solvent

ABSTRACTWe report neutron reflectivity data on (poly)styrene-(poly)ethylene oxide (PS-PEO) diblock copolymers adsorbed onto quartz from the selective solvent deuterated cyclohexane (a non-solvent for PEO and a poor solvent for PS). The PEO "anchor block" adsorbs strongly to form a thin layer on the quartz substrate, while the PS chains dangle into the solvent. We find that under static conditions the density profile of the PS block in a poor solvent can be well described by a Schultz function which is indicative of a polymer "mushroom." Furthermore, we have studied the same system under shear at shear rates from 0-400s-l. We find that there is a dramatic increase in the thickness of the PS layer under shear in cyclohexane and that the relaxation time from the shear-on profile back to the static profile is on the order of several days.

Composition and properties of complexes between anionic liposomes and diblock copolymers with cationic and poly(ethylene oxide) blocks

2017 ◽  
Vol 66 (11) ◽  
pp. 1669-1674 ◽  
Author(s):  
Oleg V Ivashkov ◽  
Andrey V Sybachin ◽  
Anna A Efimova ◽  
Viktor N Orlov ◽  
Dmitry V Pergushov ◽  
...  
Keyword(s):  
Ethylene Oxide ◽  
Diblock Copolymers ◽  
Anionic Liposomes ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene

Synthesis, characterization and association behavior of linear-dendritic amphiphilic diblock copolymers based on poly(ethylene oxide) and a dendron derived from 2,2′-bis(hydroxymethyl)propionic acid

2015 ◽  
Vol 6 (12) ◽  
pp. 2274-2282 ◽  
Author(s):  
Weiwei Zhang ◽  
Weiwei Jiang ◽  
Delong Zhang ◽  
Guangyue Bai ◽  
Pengxiao Lou ◽  
...  
Keyword(s):  
Block Copolymers ◽  
Ethylene Oxide ◽  
Propionic Acid ◽  
Diblock Copolymers ◽  
Association Behavior ◽  
Poly Ethylene Oxide ◽  
Amphiphilic Diblock Copolymers ◽  
Poly Ethylene

Two new amphiphilic linear-dendritic block copolymers have been synthesized and characterized. And their association behaviors have also been studied.

Nanostructures from photo-cross-linked amphiphilic poly(ethylene oxide)-b-alkyl diblock copolymers

Polymer ◽  
2005 ◽  
Vol 46 (7) ◽  
pp. 2020-2028 ◽  
Author(s):  
Erwan Nicol ◽  
Frédérick Niepceron ◽  
Chantal Bonnans-Plaisance ◽  
Dominique Durand
Keyword(s):  
Ethylene Oxide ◽  
Diblock Copolymers ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene

Solution Crystallization Behavior of Crystalline−Crystalline Diblock Copolymers of Poly(ethylene oxide)-block-poly(ε-caprolactone)

2010 ◽  
Vol 43 (14) ◽  
pp. 6113-6119 ◽  
Author(s):  
Ryan M. Van Horn ◽  
Joseph X. Zheng ◽  
Hao-Jan Sun ◽  
Ming-Siao Hsiao ◽  
Wen-Bin Zhang ◽  
...  
Keyword(s):  
Ethylene Oxide ◽  
Crystallization Behavior ◽  
Diblock Copolymers ◽  
Solution Crystallization ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene

scholarly journals Large and Giant Unilamellar Vesicle(s) Obtained by Self-Assembly of Poly(dimethylsiloxane)-b-poly(ethylene oxide) Diblock Copolymers, Membrane Properties and Preliminary Investigation of Their Ability to Form Hybrid Polymer/Lipid Vesicles

Polymers ◽  
2019 ◽  
Vol 11 (12) ◽  
pp. 2013 ◽  
Author(s):  
Martin Fauquignon ◽  
Emmanuel Ibarboure ◽  
Stéphane Carlotti ◽  
Annie Brûlet ◽  
Marc Schmutz ◽  
...  
Keyword(s):  
Light Scattering ◽  
Ethylene Oxide ◽  
Self Assembly ◽  
Diblock Copolymers ◽  
Lipid Vesicles ◽  
Membrane Properties ◽  
Membrane Thickness ◽  
Hybrid Polymer ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene

In the emerging field of hybrid polymer/lipid vesicles, relatively few copolymers have been evaluated regarding their ability to form these structures and the resulting membrane properties have been scarcely studied. Here, we present the synthesis and self-assembly in solution of poly(dimethylsiloxane)-block-poly(ethylene oxide) diblock copolymers (PDMS-b-PEO). A library of different PDMS-b-PEO diblock copolymers was synthesized using ring-opening polymerization of hexamethylcyclotrisiloxane (D3) and further coupling with PEO chains via click chemistry. Self-assembly of the copolymers in water was studied using Dynamic Light Scattering (DLS), Static Light Scattering (SLS), Small Angle Neutron Scattering (SANS), and Cryo-Transmission Electron Microscopy (Cryo-TEM). Giant polymersomes obtained by electroformation present high toughness compared to those obtained from triblock copolymer in previous studies, for similar membrane thickness. Interestingly, these copolymers can be associated to phospholipids to form Giant Hybrid Unilamellar Vesicles (GHUV); preliminary investigations of their mechanical properties show that tough hybrid vesicles can be obtained.

Synthesis of large-pore SBA-15 silica using poly(ethylene oxide)-poly(methyl acrylate) diblock copolymers

Adsorption ◽  
2009 ◽  
Vol 15 (2) ◽  
pp. 156-166 ◽  
Author(s):  
Liang Cao ◽  
Hongchen Dong ◽  
Liang Huang ◽  
Krzysztof Matyjaszewski ◽  
Michal Kruk
Keyword(s):  
Ethylene Oxide ◽  
Methyl Acrylate ◽  
Diblock Copolymers ◽  
Large Pore ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene

Mesoscopic simulation of the self-assembly of the weak polyelectrolyte poly(ethylene oxide)-block-poly(methyl methacrylate) diblock copolymers

Soft Matter ◽  
2015 ◽  
Vol 11 (22) ◽  
pp. 4366-4374 ◽  
Author(s):  
Dan Mu ◽  
Jian-Quan Li ◽  
Sheng-Yu Feng
Keyword(s):  
Ethylene Oxide ◽  
Self Assembly ◽  
Diblock Copolymers ◽  
The Self ◽  
The Other ◽  
Mesoscopic Simulation ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene ◽  
The Right ◽  
Weak Polyelectrolytes

We designed twelve types of weak polyelectrolytes (i.e., PEO-b-PMMA copolymers (BCP) in multi-arm structures, where six include EO blocks as joint points and the other six have MMA blocks as joint points). Of these, six are displayed; structures with EO blocks as joint points on the left, and those with MMA blocks as joint points on the right.

Sign in / Sign up

Export Citation Format

Share Document