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Showing 1 to 20 of 84 for “"diblock copolymers"”.
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Self-assembly of linear-dendritic diblock copolymers
Linear-dendritic diblock copolymers combine the properties of dendritic macromolecules with the morphology of block copolymers, making it possible to create nanostructured materials which self assemble in the bulk state to form ordered thin films, and in solution to form highly functional micellar …
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Complexation Between DNA and Hydrophilic-Cationic Diblock Copolymers
… polycation architectures, hydrophilic-cationic diblock copolymers are particularly promising due to their versatility. Compared to the emphasis on biological evaluation of polyplexes, however, in-depth understanding of the polyplex formation process (and the parameters involved) is rather …
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Self-assembly of globular protein-polymer diblock copolymers
Self-assembly of protein-polymer block copolymers provides a simple bottom-up approach towards protein nanopatteming for the fabrication of more effective and efficient bioelectronic and biocatalytic devices. Changes in shape and surface chemistry between proteinpolymer conjugates and classical …
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Order in side-chain liquid crystalline diblock copolymers
The architecture of side-chain liquid crystalline diblock copolymers (SCLCBC's) involves order on two different but interdependent length scales. Through molecular-scale interactions, liquid crystalline moieties self-assemble into a variety of mesophases, and on a larger length scale, chemical …
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Synthesis, morphologies and applications of polyoxometalate-containing diblock copolymers
Block copolymers by virtue of their ability to self assemble and microphaseseparation due to the contrast in chemical and physical properties of the covalently linked blocks constitute the essential building blocks towards various nano or micro sized architectures. Polyoxometalates (POM), on the …
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Order in Thin Films of Diblock Copolymers by Supramolecular Assembly
Thin membranes with dense periodic arrays of nanoscopic voids were fabricated using the principles of supramolecular assembly and self-organization in polymers. Such nanoporous membranes can be used as templates for synthesis and patterning of various organic and inorganic materials. In this thesis …
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The synthesis and assembly of linear-dendritic rod diblock copolymers
… linear polymer core, and hybrid-linear dendritic diblock copolymers have been prepared by attaching a dendron to the end functional group of a linear polymer. This linear block in the diblock copolymers also adds physical integrity and an assembly mechanism for arrangement of the polymer. …
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Catalytic properties of palladium nanocluster synthesized within microphase-separated diblock copolymers
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1997.
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Disentangle model differences and fluctuation effects in DPD simulations of diblock copolymers
… DPD simulations of microphase separation of diblock copolymer melts by Groot and Madden 2 , the simulation results were compared and found to be consistent with the phase diagram for the "standard model" of continuous Gaussian chains with Dirac δ-function interactions obtained from …
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Raft Polymerization Of Ph-Responsive, Diblock Copolymers For Nucleic Acid Delivery Vehicles
… of a family of amphiphilic, cationic copolymers to be utilized for nucleic acid delivery. These copolymers are composed of a stabilizing hydrophilic block of oligo(ethylene glycol) methyl ether methacrylate (OEMGA) and a cationic, endosomolytic block of 2-(dimethylamino) ethyl …
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New siloxane - nylon-6 diblock copolymers for emulsification and toughening of blends
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1989.
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Novel amphiphilic diblock copolymers by RAFT-polymerization, their self-organization and surfactant properties
… to synthesize novel well-defined amphiphilic diblock copolymers composed of the constant hydrophobic block poly(butyl acrylate) and of 6 different hydrophilic blocks with various polarities, namely a series of non-ionic, non-ionic comb-like, anionic and cationic hydrophilic blocks. The …
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Amphiphilic Diblock Copolymers: Study of Interpolyelectrolyte Complexation in Organic Media and Nanoencapsulation of Melatonin
… and poly(acrylic acid) (PAA), and amphiphilic diblock copolymers based on polystyrene and the ionizable block poly(acrylic acid) were synthesized via Atom Transfer Radical Polymerization (ATRP). All polymers were characterized using 1H NMR and gel permeation chromatography to confirm their …
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Crazing and large deformation behavior in a model set of polystyrene/polybutadiene diblock copolymers
Thesis (Sc.D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1984.
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Synthesis and Functionalization of Poly(ethylene oxide-b-ethyloxazoline) Diblock Copolymers with Phosphonate Ions
… as hydrophilic "stealth" drug carriers. As block copolymers, the PEOX group offers a wider variety of functionalization. The goal of this project was to synthesize a poly(ethylene oxide)-b-poly(2-ethyl-2-oxazoline) (PEO-b-PEOX) block copolymer and functionalize pendent groups of PEOX with …
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The synthesis of amphiphilic diblock copolymers: An investigation into the formation of micelles as a function of hydrophobic block length
<p>Acrylate-based amphiphilic diblock copolymers show great potential for anti-cancer drug transport due to their ability to aggregate into protective core-shell micelles. Using RAFT polymerization, copolymers containing poly(acrylic acid) and poly(methyl acrylate) blocks were made with high …
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Study of the phase behavior of poly(n-alkyl methacrylate-b-methyl methacrylate) diblock copolymers and its influence on the wettability of polymer surfaces
… poly(n-alkyl methacrylate-b-methyl methacrylate) diblock copolymers and its influence on the wettability of the polymer surfaces were carried out. For this investigation two polymethacrylic systems differing only in the alkyl rest of one block: poly(pentyl methacrylate-b-methyl methacrylate) and …
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The Physical and Spectroscopic Study of a Series of Poly(3-hexyl thiophene) Homopolymers and Poly(3-hexyl thiophene)-block-Poly(2-hydroxyethyl methacrylate) Diblock Copolymers
In block-selective solvent, the rod-coil block copolymers can form various micellar structures. With block copolymers that contain a conjugated polymer block, the conformation of the conjugated polymer can be reflected by spectral changes in the solution. Therefore, it is of interest to study the …
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Self-assembly of silicon-containing triblock copolymer and terpolymers
… with a variety of morphologies. Compared to diblock copolymers that have been extensively studied to form the conventional morphologies such as spheres, cylinders, and lamellae depending on the block volume fraction, more complex polymer architectures are expected to offer additional degrees …
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Synthesis and characterization of bifunctional materials for electro-optical applications
… hole transport units II. Fully functionalized AB-diblock copolymers I. Bifunctional Ru(II) dyes carrying hole transport units for interface modification in solid-state dye-sensitized nc-Titaniumdioxide solar cells The main concern in this part of this work was the improvement of the …
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