Impact of Architecture of Symmetric Block Copolymers on the Stability of a Dislocation Defect

2021 ◽  
Author(s):  
Tianyi Hu ◽  
Yongzhi Ren ◽  
Liangshun Zhang ◽  
Weihua Li
Keyword(s):  
Block Copolymers ◽  
Dislocation Defect ◽  
The Stability ◽  
Symmetric Block

Formation of interconnected morphologies via nanorod inclusion in the confined assembly of symmetric block copolymers

2014 ◽  
Vol 16 (19) ◽  
pp. 8865-8871 ◽  
Author(s):  
Jay Hoon Park ◽  
Yong Lak Joo
Keyword(s):  
Block Copolymer ◽  
Block Copolymers ◽  
Symmetric Block ◽  
Mesoscale Simulations

Mesoscale simulations demonstrate that nanorod inclusion in a symmetric block copolymer leads to facile formation of interconnected morphologies under cylindrical confinement.

Nonbulk Complex Structures in Thin Films of Symmetric Block Copolymers on Chemically Nanopatterned Surfaces

2012 ◽  
Vol 45 (9) ◽  
pp. 3986-3992 ◽  
Author(s):  
Guoliang Liu ◽  
François Detcheverry ◽  
Abelardo Ramírez-Hernández ◽  
Hiroshi Yoshida ◽  
Yasuhiko Tada ◽  
...  
Keyword(s):  
Thin Films ◽  
Block Copolymers ◽  
Complex Structures ◽  
Symmetric Block

Creating suprapolymer assemblies: nanowires, nanorings, and nanospheres prepared from symmetric block-copolymers confined in spherical particles

2012 ◽  
Vol 22 (16) ◽  
pp. 7672 ◽  
Author(s):  
Hiroshi Yabu ◽  
Shunsuke Sato ◽  
Takeshi Higuchi ◽  
Hiroshi Jinnai ◽  
Masatsugu Shimomura
Keyword(s):  
Block Copolymers ◽  
Spherical Particles ◽  
Symmetric Block

pH-responsive microspheres encapsulated with iron oxide nanoaggregates for gastrointestinal delivery

2012 ◽  
Vol 27 (1) ◽  
pp. 54-66 ◽  
Author(s):  
Young Ju Son ◽  
Hyuk Sang Yoo
Keyword(s):  
Iron Oxide ◽  
Block Copolymer ◽  
Block Copolymers ◽  
Diblock Copolymer ◽  
Ph Responsive ◽  
Polymeric Microspheres ◽  
Intestinal Delivery ◽  
Poly Ethylene ◽  
The Stability

Block copolymer-stabilized iron oxide nanoaggregates were fabricated into pH-responsive polymeric microspheres for intestinal delivery of the magnetic nanoaggregates. A diblock copolymer consisted of methoxy poly(ethylene glycol) (mPEG) and poly(e-caprolactone) (PCL) was synthesized by ring-opening polymerization. Microspheres, consisted of Eudragit L100-55 encapsulate and stabilized magnetic nanoaggregates, were prepared by an oil-in-oil emulsification technique. The magnetization of the microspheres decreased, and the stability of the magnetic nanoaggregates in aqueous solutions increased as the amount of block copolymers in the microspheres increased. The encapsulated magnetic nanoaggregates were visualized by scanning electron microscopy and energy-dispersive X-ray spectroscopy. The encapsulation efficiency of nanoaggregates of the microspheres increased as the amount of diblock copolymer in the nanoaggregates was increased. The in vitro experiments confirmed the pH-dependent release of the nanoaggregates from the microspheres. The microspheres were administered to the animals by oral gavages, and the nanoaggregates in small intestines were visualized by histological examination of intestinal inner walls. Higher amounts of the block copolymer in the nanoaggregates increased the uptake efficiency in the intestinal tissues. Thus, the incorporation of the block copolymers in the magnetic nanoaggregates increased the intestinal absorption of the aggregates and Eudragit microspheres and effectively protected the nanoaggregates at low pH conditions of the stomach area.

Simultaneous uniaxial extensional deformation and cylindrical confinement of block copolymers using non-equilibrium molecular dynamics

Soft Matter ◽  
2018 ◽  
Vol 14 (8) ◽  
pp. 1389-1396 ◽  
Author(s):  
George L. Shebert ◽  
Yong Lak Joo
Keyword(s):  
Molecular Dynamics ◽  
Block Copolymers ◽  
Coarse Grained ◽  
Nonequilibrium Molecular Dynamics ◽  
Combined Effects ◽  
Extensional Deformation ◽  
Non Equilibrium Molecular Dynamics ◽  
Symmetric Block ◽  
Non Equilibrium

Using coarse-grained nonequilibrium molecular dynamics, symmetric block copolymers are simulated under the combined effects of cylindrical confinement and uniaxial extensional deformation.

Effect of Substrate and Molecular Weight on the Stability of Thin Films of Semicrystalline Block Copolymers

Langmuir ◽  
2007 ◽  
Vol 23 (7) ◽  
pp. 3673-3679 ◽  
Author(s):  
Guo-Dong Liang ◽  
Jun-Ting Xu ◽  
Zhi-Qiang Fan ◽  
Shao-Min Mai ◽  
Anthony J. Ryan
Keyword(s):  
Thin Films ◽  
Molecular Weight ◽  
Block Copolymers ◽  
The Stability

Lattice self-consistent field calculations of confined symmetric block copolymers of various chain architectures

Soft Matter ◽  
2020 ◽  
Vol 16 (17) ◽  
pp. 4311-4323
Author(s):  
Jingxue Zhang ◽  
Jiaping Wu ◽  
Run Jiang ◽  
Zheng Wang ◽  
Yuhua Yin ◽  
...  
Keyword(s):  
Block Copolymer ◽  
Block Copolymers ◽  
Chain Architecture ◽  
Consistent Field ◽  
Copolymer Melts ◽  
Structural Details ◽  
Self Consistent ◽  
Self Consistent Field ◽  
Symmetric Block

The effects of chain architecture on the structural details and orientation of confined lamellae formed by symmetric AB-type block copolymer melts are studied.

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