Results 261 to 270 of about 46,823 (313)
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Skin delivery by block copolymer nanoparticles (block copolymer micelles)
International Journal of Pharmaceutics, 2015Block copolymer nanoparticles often referred to as "block copolymer micelles" have been assessed as carriers for skin delivery of hydrophobic drugs. Such carriers are based on organic biocompatible and biodegradable materials loaded with hydrophobic drugs: poly(lactide)-block-poly(ethylene glycol) copolymer (PLA-b-PEG) nanoparticles that have a solid ...
Laredj-Bourezg, Faiza +6 more
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Dynamic Assembly of Block-Copolymers
2011Block copolymers (BCs) are well-known building blocks for the creation of a large variety of nanostructured materials or objects through a dynamic assembly stage which can be either autonomous or guided by an external force. Today's nanotechnologies require sharp control of the overall architecture from the nanoscale to the macroscale.
D, Quémener +2 more
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Polymer Bulletin, 1996
The preparation of acid chloride of poly(propylene oxide), PPO, the synthesis of prepolymer poly(p-benzamide), and of block copolymers of poly(p-benzamide)-b-poly(propylene oxide) are reported. The preparation of prepolymer poly(p-benzamide), PBA, and activated PPO, as well as PBA-PPO block copolymer are discussed according to their FTIR spectra.
F. M. Rabagliati +5 more
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The preparation of acid chloride of poly(propylene oxide), PPO, the synthesis of prepolymer poly(p-benzamide), and of block copolymers of poly(p-benzamide)-b-poly(propylene oxide) are reported. The preparation of prepolymer poly(p-benzamide), PBA, and activated PPO, as well as PBA-PPO block copolymer are discussed according to their FTIR spectra.
F. M. Rabagliati +5 more
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Current Opinion in Solid State and Materials Science, 1999
The efficient synthesis of structurally well-defined block copolymers is exciting and important area of research. This article describes several methods for the preparation of di- and triblock copolymers. Examples are taken from the literature and include anionic, cationic, free-radical and metal-catalyzed polymerizations that are useful for the ...
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The efficient synthesis of structurally well-defined block copolymers is exciting and important area of research. This article describes several methods for the preparation of di- and triblock copolymers. Examples are taken from the literature and include anionic, cationic, free-radical and metal-catalyzed polymerizations that are useful for the ...
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Prismatic Block Copolymer Hexosomes
ACS Nano, 2023Cubosomes and hexosomes are recent solution morphologies with an ordered porous structure and are observed for lipids and amphiphilic block copolymers (BCPs) with high hydrophobic fractions. Whereas lipid hexosomes typically exhibit a prismatic shape, BCP hexosomes have so far only been observed as closed microspheres where inner channels are not ...
André H. Gröschel +4 more
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2014
Phase separation of block copolymers, also known as directed self-assembly has potential application for increasing the resolution of existing lithographic tools to increase the density of patterns and interconnects in integrated circuits.
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Phase separation of block copolymers, also known as directed self-assembly has potential application for increasing the resolution of existing lithographic tools to increase the density of patterns and interconnects in integrated circuits.
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Cyclic Block Copolymers for Controlling Feature Sizes in Block Copolymer Lithography
ACS Nano, 2012Block copolymer lithography holds promise as a next-generation technique to achieve the sub-20 nm feature sizes demanded by semiconductor roadmaps. While molecular weight and block immiscibility have traditionally been used to control feature size, this study demonstrates that macromolecular architecture is also a powerful tool for tuning domain ...
J. E. Poelma +5 more
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Self-assembly of block copolymers
Chemical Society Reviews, 2012Block copolymer (BCP) self-assembly has attracted considerable attention for many decades because it can yield ordered structures in a wide range of morphologies, including spheres, cylinders, bicontinuous structures, lamellae, vesicles, and many other complex or hierarchical assemblies.
Yiyong, Mai, Adi, Eisenberg
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Morphology of block copolymers and mixtures of block copolymers at free surfaces
Polymer, 1992Abstract The microdomain morphology of block copolymers at the free surfaces of solution-cast films was investigated by means of transmission electron microscopy and ultramicrotomy. The free surfaces of block copolymers consisting of amorphous components obey the thermodynamic requirements, i.e.
Hirokazu Hasegawa, Takeji Hashimoto
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Bioinspired functional block copolymers
Soft Matter, 2007The diversity and complexity of structures and functions in synthetic polymer systems can be increased through conjugation with biological segments or, in other words, through generation of "polymer-bioconjugates" or "macromolecular chimeras". The present contribution highlights major synthetic approaches toward sophisticated functional hybrid block ...
Börner, H., Schlaad, H.
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