Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 66 for “"diblock copolymer"”.
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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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Interfaces and Fluctuations in Diblock Copolymer Melts and Ternary Mixtures with Homopolymers
… for study of equilibrium phase behavior of block copolymer melts and mixtures. However, it fails to take into account the effect of fluctuations. This leads to some incorrect predictions for the phase behavior including the nature and location of order-disorder tran- sitions, associated phenomemon …
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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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AB DIBLOCK COPOLYMER NANOPARTICLES VIA RAFT-MEDIATED POLYMERIZATION AS A PSEUDOSTATIONARY PHASE FOR ELECTROKINETIC CHROMATOGRAPHY
Electrokinetic chromatography (EKC) is a powerful analytical technique where analytes are separated according to their interactions with the pseudostationary and mobile phases within an electric field. Pseudostationary phases (PSPs) are an integral part of EKC and currently there are a limited …
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AB DIBLOCK COPOLYMER NANOPARTICLES VIA RAFT-MEDIATED POLYMERIZATION AS A PSEUDOSTATIONARY PHASE FOR ELECTROKINETIC CHROMATOGRAPHY
Electrokinetic chromatography (EKC) is a powerful analytical technique where analytes are separated according to their interactions with the pseudostationary and mobile phases within an electric field. Pseudostationary phases (PSPs) are an integral part of EKC and currently there are a limited …
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An investigation of structure and properties in a model set of diblock copolymer-homopolymer blends
Thesis (Sc.D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1982.
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Mechanical properties of PDMS-nylon-6 diblock copolymer and its blends with homo nylon-6
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1995.
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Single molecule tracking studies of solvent-swollen microdomains in cylinder-forming polystyrene-Poly (ethylene oxide) diblock copolymer films
Solvent swelling of block copolymer microdomains plays an essential role in the improvement of microdomain alignment by solvent vapor annealing and in chemical separations using block copolymer monoliths. Here, investigation of the effects of solvent swelling on the molecular permeability and …
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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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Economic potential of high density data storage implemented by patterned magnetic media technology
… lithography, nanoimprint lithography, templated diblock copolymer self-assembly and self-assembled magnetic nanoparticles are discussed. Cost modeling was done to prove the enormous gain in revenue for the proposed fabrication scheme. It is proposed that the fabrication scheme of templated …
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III-V inverse quantum dots fabrication, characterization and application
… shows the quantum dot like phenomenon. Diblock copolymer lithography and anodic aluminum oxide transfer are used to fabricate large area dot patterning. In diblock copolymer lithography, pore diameter and pitch are approximately 17 nm and 37 nm respectively. In anodic aluminum oxide …
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Characterization and technical studies of semiconductor nanoclusters synthesized within polymer films
… nanoclusters were synthesized within diblock copolymer films containing carboxylic acid units on one of the blocks. Diblock copolymer films microphase separate during film casting, and yield many different morphologies (spherical lamellar/ cylindrical ) depending on the ratio of the …
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Mathematical and computational modelling of stochastic partial differential equations applied to advanced methods
… modelling and simulations were carried to study diblock copolymer system confined in circular annular pores, cylindrical pores and spherical pores using Cell Dynamics simulation (CDS) method employed in physically motivated discretization. The lamella, cylindrical and spherical forming systems …
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Shear-induced alignment in block copolymer solutions
… alignment of the ordered microdomains of block copolymers in solution has been accomplished by using mechanical shear fields. Two pathways to monitore the achievement of aligned structures have been used: rheo-optical and in situ rheo-SAXS methods. The AC diblock copolymer and ABC triblock …
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From Nanoplates to Bottlebrushes: Engineering Thermodynamics in Polymer Nanocomposites
… (1) nanoplates grafted with polymers in a linear diblock copolymer matrix and (2) bare nanospheres in a core-shell bottlebrush matrix. The investigation advances the understanding of nanoparticle dispersion in linear diblock copolymer matrices and unveils the thermodynamics of a novel core-shell …
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DESIGN AND SYNTHESIS OF BLOCK COPOLYMERS THAT SELF ASSEMBLE INTO MICELLES WITH CONTROLLED ACID AND LIPASE CATALYZED DEGRADATION
… glycol) (PCL-b-PEG) is typical amphiphilic block copolymer that self assembles into micelles in water where the hydrolytically stable hydrophilic PEG segment forms the exterior corona and the core contains the hydrophobic degradable PCL block. Micelles from PCL-b-PEG block copolymers are among the …
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Development of Soft-Matter Delivery Systems: Coupling pH Responsive Polymers to Porous Silica Particles
… In addition to coupling commercially available diblock polymers we synthesized and characterized a unique dual hydrophilic pH responsive diblock copolymer, PEO-PAA. This hybrid polymeric-nanoparticle system drastically improves targeting and release capabilities through the modular ability to …
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Self-assembled thin polymer film used for sensing application
… monolayer and nanoporous thin films derived from diblock copolymer are discussed. In the first part of this thesis, a well-packed self-assembled monolayer with phosphonic acid as head group and diacetylenic functional group in the tail formed on AlGaN/GaN surface. According to water contact angle …
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Conformational investigations of a model polyzwitterion and its applications in oil recovery
… are leveraged in the form of schizophrenic diblock copolymer functionalized nanoparticles, to develop temperature tunable pickering emulsifiers. In contrast to conventional temperature responsive pickering emulsifiers, which induce phase separation upon heating, the schizophrenic diblock …
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