Tunable helical structures formed by ABC triblock copolymers under cylindrical confinement

2019 ◽  
Vol 21 (48) ◽  
pp. 26333-26341
Author(s):  
Meijiao Liu ◽  
Ka Chen ◽  
Weihua Li ◽  
Xinping Wang
Keyword(s):  
Block Copolymers ◽  
Triblock Copolymers ◽  
Helical Structures ◽  
Abc Triblock Copolymers

Block copolymers confined in nanopores provide unique achiral systems for the formation of helical structures.

Preparation of ABC triblock copolymers of N-alkyl substituted acrylamides by RAFT polymerization

2007 ◽  
Vol 85 (6) ◽  
pp. 407-411 ◽  
Author(s):  
Ya Cao ◽  
X X Zhu
Keyword(s):  
Block Copolymers ◽  
Propionic Acid ◽  
Chain Transfer ◽  
Triblock Copolymers ◽  
Raft Polymerization ◽  
Synthetic Pathway ◽  
Abc Triblock Copolymers ◽  
Alkyl Groups ◽  
Reversible Addition ◽  
Acrylamide Monomers

Reversible addition-fragmentation chain transfer (RAFT) polymerization of N-alkyl substituted acrylamides has been carried out by the use of a trithiocarbonate (2-dodecylsulfanylthiocarbonyl-sulfanyl-2-methyl propionic acid) as the RAFT reagent. The N-alkyl groups of the acrylamide monomers are important in the RAFT process. N-alkyl monosubstituted polyacrylamides are found to be active macro-chain transfer agents, while N,N-disubstituted monomers can react easily with them to form a sequent block. We have designed a synthetic pathway to successfully prepare ABC triblock copolymers of N-alkyl substituted acrylamides with low polydispersities (PDI < 1.20) by a three-step RAFT polymerization process.Key words: block copolymers, RAFT polymerization, N-alkyl substituted acrylamides, thermosensitive polymers.

Self-Assembly of Hydrogels From Elastin-Mimetic Block Copolymers

2002 ◽  
Vol 724 ◽  
Author(s):  
Elizabeth R. Wright ◽  
R. Andrew McMillan ◽  
Alan Cooper ◽  
Robert P. Apkarian ◽  
Vincent P. Conticello
Keyword(s):  
Block Copolymers ◽  
Self Assembly ◽  
Triblock Copolymers ◽  
Variable Temperature ◽  
Inverse Temperature ◽  
Temperature Transition ◽  
Scanning Calorimetry ◽  
Design Synthesis ◽  
Inverse Temperature Transition ◽  
Functional Biomaterials

AbstractTriblock copolymers have traditionally been synthesized with conventional organic components. However, triblock copolymers could be synthesized by the incorporation of two incompatible protein-based polymers. The polypeptides would differ in their hydrophobicity and confer unique physiochemical properties to the resultant materials. One protein-based polymer, based on a sequence of native elastin, that has been utilized in the synthesis of biomaterials is poly (Valine-Proline-Glycine-ValineGlycine) or poly(VPGVG) [1]. This polypeptide has been shown to have an inverse temperature transition that can be adjusted by non-conservative amino acid substitutions in the fourth position [2]. By combining polypeptide blocks with different inverse temperature transition values due to hydrophobicity differences, we expect to produce amphiphilic polypeptides capable of self-assembly into hydrogels. Our research examines the design, synthesis and characterization of elastin-mimetic block copolymers as functional biomaterials. The methods that are used for the characterization include variable temperature 1D and 2D High-Resolution-NMR, cryo-High Resolutions Scanning Electron Microscopy and Differential Scanning Calorimetry.

Stable Superhydrophobic Porous Coatings from Hybrid ABC Triblock Copolymers and Their Anticorrosive Performance

2017 ◽  
Vol 9 (35) ◽  
pp. 30056-30063 ◽  
Author(s):  
Xin Zhou ◽  
Junhua Kong ◽  
Jiaotong Sun ◽  
Hui Li ◽  
Chaobin He
Keyword(s):  
Triblock Copolymers ◽  
Porous Coatings ◽  
Abc Triblock Copolymers

Self-assembly of block copolymers into sieve-like particles with arrayed switchable channels and as scaffolds to guide the arrangement of gold nanoparticles

Nanoscale ◽  
2017 ◽  
Vol 9 (39) ◽  
pp. 15056-15061 ◽  
Author(s):  
Yun He ◽  
Yan Zhang ◽  
Nan Yan ◽  
Yutian Zhu ◽  
Wei Jiang ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Block Copolymers ◽  
Self Assembly ◽  
Triblock Copolymers ◽  
Emulsion Droplets

The unique sieve-like particles with lattice arrayed switchable channels were created via the confined self-assembly of P4VP-b-PS-b-P4VP triblock copolymers within the emulsion droplets.

Antinucleation Effect of the Polyethylene Block on the Polycaprolactone Block in ABC Triblock Copolymers

1998 ◽  
Vol 31 (22) ◽  
pp. 7756-7763 ◽  
Author(s):  
V. Balsamo ◽  
A. J. Müller ◽  
R. Stadler
Keyword(s):  
Triblock Copolymers ◽  
Abc Triblock Copolymers
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