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Showing 1 to 20 of 160 for “"diblock"”.
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Morphologies of PDMS-containing diblock polymers
… of polydimethylsiloxane (PDMS)-containing diblock polymers are investigated as a function of volume fraction, segregation, processing procedure, and temperature. Strongly segregated polyisoprene-PDMS and polystyrene-PDMS diblocks are prepared according to standard procedures in the …
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Nanophase separation in monodisperse rodcoil diblock polymers
… self-organization in condensed phases of rodcoil diblock polymers synthesized in our laboratory. Each macromolecule consists of a rigid and monodisperse rodlike segment covalently attached to a flexible coillike segment of narrow molecular weight distribution such that both segments share the same …
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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 in linear-dentritic diblock copolymer films
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1999.
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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
… capability. Combining POM clusters with diblock copolymers can lead to a fascinating class of hybrid materials where the POM cluster not only affect the selfassembly process of various diblock copolymers but also brings its unique electronic properties into the hybrid system. Herein we …
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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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Development of Carbohydrate-based Diblock Polymers for Nucleic Acid Delivery
… nucleic acid delivery vehicles based on cationic diblock glycopolymers that contain glucosamine and trehalosamine. Practical procedures were developed to synthesize 2-methacrylamido-2-deoxy glucose and 6-methacrylamido-6-deoxy trehalose starting with commercially available carbohydrates and …
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The structure, color, and rheology of concentrated diblock bottlebrush polymer solutions
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2023-04-12 without embargo terms
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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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Interfaces and Fluctuations in Diblock Copolymer Melts and Ternary Mixtures with Homopolymers
… asym- metry in ternary mixtures of AB diblock copolymers, A homopolymers and B homopolymers which are high molecular counterparts of oil-water-surfactant mixtures. We show that the sign of the spontaneous curvature of an asym- metric diblock copolymer monolayer in these ternary mixtures …
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Raft Polymerization Of Ph-Responsive, Diblock Copolymers For Nucleic Acid Delivery Vehicles
Since the development of gene therapy, a variety of non-viral nucleic acid delivery vehicles have been prepared and studied for their transfection efficiencies. Recently, polymeric gene delivery vehicles have gained popularity for their low immunogenicity and high transfection efficiency. With the …
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Blend of crystallizable polybutadiene isomers : compatibilization by addition of amorphous diblock copolymer
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1991.
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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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