Share This Author
Unexpected consequences of block polydispersity on the self-assembly of ABA triblock copolymers.
- Joan M. Widin, A. Schmitt, A. L. Schmitt, K. Im, M. Mahanthappa
- Materials ScienceJournal of the American Chemical Society
- 16 February 2012
It is demonstrated that polydisperse SBS triblockCopolymers self-assemble into periodic structures with unexpectedly enhanced stabilities that greatly exceed those of equivalent monodisperse copolymers, and it is shown that narrow dispersitycopolymers are not required for periodic nanoscale assembly.
Effect of Nanoscale Morphology on the Conductivity of Polymerized Ionic Liquid Block Copolymers
- R. Weber, Yuesheng Ye, A. L. Schmitt, S. Banik, Y. Elabd, M. Mahanthappa
- Materials Science
- 24 June 2011
Polymerized ionic liquid (POIL) block copolymers represent a unique class of materials for fundamental studies of single ion conduction as a function of morphology in microphase-separated polymer…
Ab Initio Modeling of Electrolyte Molecule Ethylene Carbonate Decomposition Reaction on Li(Ni,Mn,Co)O2 Cathode Surface.
This work implies that the possible rate-limiting steps of the electrolyte molecule decomposition are the reactions on the decomposed organic products on the cathode surface rather than on the bare cathodes, which is commonly used in commercial Li-ion batteries.
Low-symmetry sphere packings of simple surfactant micelles induced by ionic sphericity
- Sung A. Kim, Kyeong-Jun Jeong, A. Yethiraj, M. Mahanthappa
- Chemistry, PhysicsProceedings of the National Academy of Sciences
- 3 April 2017
It is shown that surfactant micelles also form complex, tetrahedrally closest-packed Frank–Kasper (FK) phases, and it is demonstrated that these unexpected structures arise from simultaneous optimization of interparticle electrostatic interactions and the spherical symmetry of the charged ion clouds around each micelle.
Micellar Mimicry of Intermetallic C14 and C15 Laves Phases by Aqueous Lyotropic Self-Assembly.
Investigation of hydrated mixtures of the ionic surfactant tetramethylammonium decanoate loaded with 40 wt % n-decane revealed the formation of a high symmetry bicontinuous double diamond LLC, as well as cubic C15 and hexagonal C14 Laves LLC phases that mirror the MgCu2 and MgZn2 intermetallic structure types, respectively.
Poly(vinyl ester) block copolymers synthesized by reversible addition-fragmentation chain transfer polymerizations
Homopolymerizations and block copolymerizations of vinyl acetate (VAc), vinyl pivalate (VPv), and vinyl benzoate (VBz) by reversible addition−fragmentation chain transfer (RAFT) polymerization have…
Synthetic Mimics of Bacterial Lipid A Trigger Optical Transitions in Liquid Crystal Microdroplets at Ultralow Picogram-per-Milliliter Concentrations
These and other results suggest that these amphiphiles trigger orientational transitions at ultralow concentrations through a unique mechanism that is similar to that of Lipid A and involves formation of inverted self-associated nanostructures at topological defects in the LC droplets.
Titanium-mediated syndiospecific styrene polymerizations: role of oxidation state.
Characteristics of lamellar mesophases in strongly segregated broad dispersity ABA triblock copolymers
We report the synthesis and characterization of a series of 13 strongly segregated poly(lactide-b-1,4-butadiene-b-lactide) (LBL) triblock copolymers, in which a broad dispersity center B segment (Đ =…
Microphase Separation Mode-Dependent Mechanical Response in Poly(vinyl ester)/PEO Triblock Copolymers
The morphology and mechanical properties of a series of poly(vinyl ester)/poly(ethylene oxide) triblock copolymers are reported. Reversible addition–fragmentation chain transfer (RAFT)…