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Physical Sciences and Mathematics Commons

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Polymer and Organic Materials

University of Massachusetts Amherst

Block copolymer

Articles 1 - 3 of 3

Full-Text Articles in Physical Sciences and Mathematics

Effect Of Chemical Identity And Morphology On Amphiphilic-Zwitterionic Block Copolymer Membranes, Ria Ghosh Apr 2023

Effect Of Chemical Identity And Morphology On Amphiphilic-Zwitterionic Block Copolymer Membranes, Ria Ghosh

Doctoral Dissertations

Amphiphilic block copolymers have gained a broad research interest attributed to their self-assembly properties over a range of pH, temperature, and ionic strength. Polyzwitterions have attracted special attention due to their hydrophilicity, charge sensitivity and coulombic attraction of the opposite charges over a range of environments making them a popular material of study in the field of stimuli responsive systems, for example in self-healing hydrogels, and water transport membranes. Combining the stimuli responsiveness and higher hydrophilicity of zwitterionic polymers with self-assembly behavior of amphiphilic block copolymers created an interest to study the effect of composition and identity of the zwitterionic …


Source Data For "End Exclusion Zones In Strongly Stretched, Molten Polymer Brushes Of Arbitrary Shape", Michael S. Dimitriyev, Gregory M. Grason Jan 2021

Source Data For "End Exclusion Zones In Strongly Stretched, Molten Polymer Brushes Of Arbitrary Shape", Michael S. Dimitriyev, Gregory M. Grason

Data and Datasets

Supplementary code for solving the constraint equations that describe curved polymer brushes. Also contains software for analyzing the resulting solutions.


Functional Nanocomposites From Self-Assembly Of Block Copolymers With Nanoparticles, Xinyu Wang Nov 2014

Functional Nanocomposites From Self-Assembly Of Block Copolymers With Nanoparticles, Xinyu Wang

Doctoral Dissertations

This dissertation studied the proper distribution and location control of nanoparticles (NPs) within block copolymer (BCP) templates. A facile ligand exchange reaction was introduced for the hydrophilic magnetic NPs (MNPs) that are readily dispersed in polar solvents with outstanding stability. Small molecule ligands were selected to associate strongly with particle surfaces, provide hydrophilic termini for polarity matching with polar solvents, and offer the potential for hydrogen-bonding interactions to facilitate NP incorporation into polymers. Areal ligand densities of NPs indicated a significant increase in the ligand coverage after the exchange reaction. Hydrophilic MNPs were shown to drive the self-assembly of BCPs …