scholarly journals Order–Order Morphological Transitions for Dual Stimulus Responsive Diblock Copolymer Vesicles

2016 ◽  
Vol 49 (3) ◽  
pp. 1016-1025 ◽  
Author(s):  
Joseph R. Lovett ◽  
Nicholas J. Warren ◽  
Steven P. Armes ◽  
Mark J. Smallridge ◽  
Robert B. Cracknell
Keyword(s):  
Diblock Copolymer ◽  
Stimulus Responsive ◽  
Morphological Transitions

scholarly journals Stimulus-responsive block copolymer nano-objects and hydrogels via dynamic covalent chemistry

2017 ◽  
Vol 8 (35) ◽  
pp. 5374-5380 ◽  
Author(s):  
Renhua Deng ◽  
Yin Ning ◽  
Elizabeth R. Jones ◽  
Victoria J. Cunningham ◽  
Nicholas J. W. Penfold ◽  
...  
Keyword(s):  
Block Copolymer ◽  
Alkaline Solution ◽  
Dynamic Covalent Chemistry ◽  
Stimulus Responsive ◽  
Morphological Transitions

Dynamic covalent chemistry can be used to induce reversible morphological transitions for block copolymer nano-objects in mildly alkaline solution.

External Potential Dynamics Simulation of Morphological Transitions in Diblock Copolymer Melt under an Electric Field

2014 ◽  
Vol 915-916 ◽  
pp. 545-548 ◽  
Author(s):  
Juan Juan Fan ◽  
Wei Li ◽  
Zhen Dong Pan ◽  
Min Fei Shi
Keyword(s):  
Electric Field ◽  
External Electric Field ◽  
Diblock Copolymer ◽  
External Potential ◽  
Dynamics Simulation ◽  
Morphological Transitions ◽  
Cylindrical Phase

In this study, we study morphological transitions of diblock copolymer subjected to an applied external electric field by means of external potential dynamics simulation. With this method, the lamellar and the cylindrical phase aligned along the electric field directions are presented, and the kinetic pathways of lamellae are investigated.

Morphologies in Blends of Diblock Copolymer and Homopolymer: Morphology Diagrams and the Intermaterial Dividing Surface

1991 ◽  
Vol 248 ◽  
Author(s):  
Karen I. Winey
Keyword(s):  
Molecular Weight ◽  
Diblock Copolymer ◽  
Mean Curvature ◽  
Morphological Data ◽  
Copolymer Composition ◽  
Binary Blends ◽  
Morphological Transitions ◽  
The Mean ◽  
Dividing Surface ◽  
Double Diamond

AbstractBinary blends of diblock copolymer (AB) and homopolymer (hA) self assemble upon solvent evaporation into a great variety of microphase separated morphologies. The ordered lamellar, bicontinuous double diamond, cylindrical and spherical morphologies were observed by TEM and SAXS in our studies, as well as a range of micellar morphologies.The mean curvature (H) and the area per copolymer junction (σj), which characterize the intermaterial dividing surface, increased with increasing homopolymer concentration in the blend and/or with decreasing homopolymer molecular weight. These trends were generally obeyed both between and within ordered morphology types. The increase in H and σj was related to an increased degree of mixing between the homopolymer and the block of the copolymer.Two types of isothermal morphology diagrams were constructed to consolidate the extensive morphological data and to illustrate the general morphological transitions in AB/hA blends. The constant molecular weight morphology diagrams illustrated the interdependence of the copolymer composition and the homopolymer concentration. The constant copolymer composition diagrams emphasized the importance of the relative homopolymer molecular weight and the overall blend composition.

Interfacial change on morphological transitions in styrene–isoprene diblock copolymer

2009 ◽  
Vol 45 (8) ◽  
pp. 2450-2454 ◽  
Author(s):  
Jong-Eun Kim ◽  
Wang-Cheol Zin ◽  
Jong-Hyun Ahn
Keyword(s):  
Diblock Copolymer ◽  
Morphological Transitions

scholarly journals Synthesis and Aqueous Solution Properties of Shape-Shifting Stimulus-Responsive Diblock Copolymer Nano-Objects

2021 ◽  
Author(s):  
Oliver J. Deane ◽  
James Jennings ◽  
Thomas J. Neal ◽  
Osama M. Musa ◽  
Alan Fernyhough ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Diblock Copolymer ◽  
Solution Properties ◽  
Stimulus Responsive

scholarly journals Aqueous solution behavior of stimulus-responsive poly(methacrylic acid)-poly(2-hydroxypropyl methacrylate) diblock copolymer nanoparticles

2020 ◽  
Vol 11 (12) ◽  
pp. 2147-2156 ◽  
Author(s):  
Shannon M. North ◽  
Steven P. Armes
Keyword(s):  
Aqueous Solution ◽  
Methacrylic Acid ◽  
Diblock Copolymer ◽  
Dispersion Polymerization ◽  
Aqueous Dispersion ◽  
Solution Temperature ◽  
Solution Ph ◽  
Solution Behavior ◽  
Hydroxypropyl Methacrylate ◽  
Stimulus Responsive

RAFT aqueous dispersion polymerization is used to prepare poly(methacrylic acid)-poly(2-hydroxypropyl methacrylate) diblock copolymer nanoparticles, which exhibit stimulus-responsive behaviour on adjusting the solution temperature and/or solution pH.

scholarly journals Stimulus-responsive non-ionic diblock copolymers: protonation of a tertiary amine end-group induces vesicle-to-worm or vesicle-to-sphere transitions

2017 ◽  
Vol 8 (1) ◽  
pp. 272-282 ◽  
Author(s):  
Nicholas J. W. Penfold ◽  
Joseph R. Lovett ◽  
Pierre Verstraete ◽  
Johan Smets ◽  
Steven P. Armes
Keyword(s):  
Tertiary Amine ◽  
Diblock Copolymer ◽  
Diblock Copolymers ◽  
Solution Ph ◽  
Hydroxypropyl Methacrylate ◽  
Stimulus Responsive ◽  
End Group

Morpholine-functionalised poly(glycerol monomethacrylate)-poly(2-hydroxypropyl methacrylate) diblock copolymer vesicles are transformed into worms or spheres on lowering the solution pH.

Sphere-to-worm morphological transitions and size changes through thiol–para-fluoro core modification of PISA-made nano-objects

2020 ◽  
Vol 11 (3) ◽  
pp. 704-711 ◽  
Author(s):  
Nicolas Busatto ◽  
Joseph L. Keddie ◽  
Peter J. Roth
Keyword(s):  
Diblock Copolymer ◽  
The Core ◽  
Morphological Transitions

Spherical diblock copolymer nanoparticles became larger spheres, unimers, or worm-shaped particles when functionalised via thiol–para-fluoro substitution in the core.

Surface segregation in model symmetric polyolefin diblock copolymer melts

1994 ◽  
Vol 4 (12) ◽  
pp. 2231-2248 ◽  
Author(s):  
Mohan Sikka ◽  
Navjot Singh ◽  
Frank S. Bates ◽  
Alamgir Karim ◽  
Sushil Satija ◽  
...  
Keyword(s):  
Diblock Copolymer ◽  
Surface Segregation ◽  
Copolymer Melts
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