The effect of added triblock copolymer on the nonlinear rheology of ordered diblock copolymer mesophases

1996 ◽  
Vol 40 (1) ◽  
pp. 187-197 ◽  
Author(s):  
James L. Harden ◽  
Masao Doi
Keyword(s):  
Diblock Copolymer ◽  
Triblock Copolymer ◽  
Nonlinear Rheology

Nonlinear elasticity and cavitation of a triblock copolymer gel

Soft Matter ◽  
2015 ◽  
Vol 11 (21) ◽  
pp. 4315-4325 ◽  
Author(s):  
Seyed Meysam Hashemnejad ◽  
Santanu Kundu
Keyword(s):  
Nonlinear Elasticity ◽  
Triblock Copolymer ◽  
Nonlinear Rheology ◽  
Physical Gel

We investigate the nonlinear rheology and cavitation phenomena of a strain-stiffening physical gel.

From multi-responsive tri- and diblock copolymers to diblock-copolymer-decorated gold nanoparticles: the effect of architecture on micellization behaviors in aqueous solutions

Soft Matter ◽  
2015 ◽  
Vol 11 (24) ◽  
pp. 4830-4839 ◽  
Author(s):  
Lichun Song ◽  
Hui Sun ◽  
Xiaolu Chen ◽  
Xia Han ◽  
Honglai Liu
Keyword(s):  
Gold Nanoparticles ◽  
Aqueous Solutions ◽  
Diblock Copolymer ◽  
Triblock Copolymer ◽  
Diblock Copolymers ◽  
Stimuli Responsive ◽  
Aba Triblock Copolymer

This work reports on the aqueous stimuli-responsive behaviors of an ABA triblock copolymer, a BAB triblock copolymer, an AB diblock copolymer and citrate-based gold nanoparticles decorated with AB diblock copolymers.

Temperature-Dependent Optical Properties of Gold Nanoparticles Coated with a Charged Diblock Copolymer and an Uncharged Triblock Copolymer

ACS Nano ◽  
2010 ◽  
Vol 4 (2) ◽  
pp. 1187-1201 ◽  
Author(s):  
Sondre Volden ◽  
Anna-Lena Kjøniksen ◽  
Kaizheng Zhu ◽  
Jan Genzer ◽  
Bo Nyström ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Optical Properties ◽  
Diblock Copolymer ◽  
Triblock Copolymer ◽  
Temperature Dependent

Effect of Additive Constraint on the Morphological and Mechanical Properties of Triblock Copolymer Blends

1996 ◽  
Vol 461 ◽  
Author(s):  
L. Kane ◽  
D. A. Norman ◽  
S. A. White ◽  
R. J. Spontak
Keyword(s):  
Electron Microscopy ◽  
Diblock Copolymer ◽  
Triblock Copolymer ◽  
Morphological Characteristics ◽  
Mechanical Analysis ◽  
Molecular Weights ◽  
Copolymer Blends ◽  
Transmission Electron ◽  
Copolymer Blend

ABSTRACTWhile numerous studies have addressed the morphological characteristics of diblock copolymer blends either with a second copolymer or a parent homopolymer, relatively few have examined comparable blends containing a triblock copolymer. In this study, we investigate the role of mid-block bridging on the morphological and physical characteristics of blends composed of a poly(styrene-b-isoprene-b-styrene) (SIS) triblock copolymer with either an unconstrained homo-polyisoprene (hI) or an end-grafted SI diblock copolymer. Blend compositions and molecular weights of the hi, as well as the I-block of the copolymer, have all been systematically varied to elucidate the effect of additive constraint on the extent of nonideal intramicrodomain mixing. Blend morphologies are characterized using transmission electron microscopy, while blend properties have been measured by dynamic mechanical analysis.

Polyethyleneimine and Poly(ethylene glycol) Functionalized Oligoester Based Polycationic Particles

MRS Advances ◽  
2018 ◽  
Vol 3 (50) ◽  
pp. 3033-3040
Author(s):  
Magdalena Mazurek-Budzynska ◽  
Maria Balk ◽  
Marc Behl ◽  
Andreas Lendlein
Keyword(s):  
Zeta Potential ◽  
Ethylene Glycol ◽  
Diblock Copolymer ◽  
Triblock Copolymer ◽  
Diblock Copolymers ◽  
Copolymer Composition ◽  
Surface Charges ◽  
Poly Ethylene Glycol ◽  
Poly Ethylene ◽  
Carrier Systems

ABSTRACTPolycationic particles based on a degradable oligoester core are interesting candidate materials for the transfection of polyanionic macromolecules like DNA, which would enable the degradation after delivery of condensed molecules. Good transfection efficiencies can be obtained when the size of the polyplex (containing both polycationic nanoparticles and polyanionic macromolecules) does not exceed 120 nm. Therefore, here we explored how size, but also dispersity, and surface charge of these carrier systems can be adjusted by variation of the block copolymer composition or the presence and ratio of a co-assembly agent. Polycationic particles were obtained based on an amphiphilic triblock copolymer from oligo[(ε-caprolactone)-co-glycolide] (CG) functionalized with polyethyleneimine (PEI) and diblock copolymer based on poly(ethylene glycol) (PEG) modified with CG. A second series of particles was created, in which the oligoester blocks contained only ε-caprolactone units, therefore the effect of the presence of glycolide units was also studied. In both series, the ratio between di- and triblock copolymers was systematically varied. Nano-sized particles ranging from 34.5 ± 0.2 nm to 97.9 ± 0.3 nm with controllable positive surface charges between 2.9 ± 0.2 mV and 18.1 ± 0.5 mV were obtained by self-assembly in PBS solution under intensive stirring. The incorporation of PEG-C diblock copolymers resulted in an increase of particle size, however no specific relation between composition, size, and polydispersity was observed. In case of PEG-CG diblock copolymers a rather systematic increase of the particles’ size with increasing content of diblock copolymer was shown. Furthermore, with a decrease of content of diblock copolymer in the particle structure zeta potential strongly increased. Additionally, the content of glycolide units in triblock copolymer increased the zeta potential of PEI-CG-PEI-based particles in comparison to PEI-C-PEI-based ones. Therefore, obtained particles could be used as potential target-oriented polycationic macromolecules for carrier systems.

scholarly journals Synthesis and pH-responsive dissociation of framboidal ABC triblock copolymer vesicles in aqueous solution

2018 ◽  
Vol 9 (6) ◽  
pp. 1454-1463 ◽  
Author(s):  
C. J. Mable ◽  
L. A. Fielding ◽  
M. J. Derry ◽  
O. O. Mykhaylyk ◽  
P. Chambon ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Diblock Copolymer ◽  
Triblock Copolymer ◽  
Ph Responsive ◽  
Emulsion Polymerisation ◽  
Abc Triblock Copolymer

A series of framboidal ABC triblock copolymer vesicles were prepared from precursor diblock copolymer vesicles via RAFT seeded emulsion polymerisation and their acid-induced dissociation was characterised by SAXS.

A mussel-inspired catecholic ABA triblock copolymer exhibits better antifouling properties compared to a diblock copolymer

2020 ◽  
Vol 11 (28) ◽  
pp. 4622-4629
Author(s):  
Yadan Zhai ◽  
Xueqian Chen ◽  
Zhaobin Yuan ◽  
Xia Han ◽  
Honglai Liu
Keyword(s):  
Diblock Copolymer ◽  
Triblock Copolymer ◽  
Aba Triblock Copolymer

The scheme of the chemical architecture, aggregation, assembly and antifouling properties of two copolymers.

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