Recent Advances in the Synthesis and Rearrangement of Block Copolymer Brushes

Boyes, Stephen G.; Granville, Anthony M.; Baum, Marina; Akgün, Bülent; Mirous, Brian K.; Brittain, William J.

doi:10.1002/3527603824.ch8

Cited by 7 publications

(7 citation statements)

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“…The anvils were then treated with a piranha solution (3 H 2 SO 4 : 1 H 2 O 2 (v/v)) to hydroxylate the surface and facilitate chemical attachment of the radical initiator, (11-(2-bromo-2-methyl)propionyloxy) undecyltrichlorosilane [16]. PMMA brushes were grown from these surfaces by atom-transfer radical polymerization (ATRP) [17].…”

Section: Methodsmentioning

confidence: 99%

Testing the minimum thermal conductivity model for amorphous polymers using high pressure

et al. 2011

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Pressure dependence of thermal conductivity provides a critical test of the validity of the model of the minimum thermal conductivity for describing heat transport by molecular 2 vibrations of an amorphous polymer. We measure the pressure dependence of the thermal conductivity Λ(P) of poly(methyl methacrylate) (PMMA) using a combination of time-domain thermoreflectance and SiC anvil cell techniques. We also determine Λ(P) from a computational model of amorphous polystyrene. In both cases, Λ(P) is accurately predicted by the minimum thermal conductivity model via the pressure dependence of the elastic constants and density.

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Section: Methodsmentioning

confidence: 99%

Testing the minimum thermal conductivity model for amorphous polymers using high pressure

et al. 2011

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“…Surface‐grafted polymerization is currently attracting growing interest from the scientific community,344–346 and the RAFT/MADIX process has been used in a variety of studies to produce surface‐grafted polymeric chains showing living character and/or controlled molecular weight. This area of research was pioneered by Tsuji et al,347 who first studied the use of RAFT to grow polymers from a silica surface.…”

Section: Molecular Architectures Prepared From Raft/madixmentioning

confidence: 99%

Macromolecular design via reversible addition–fragmentation chain transfer (RAFT)/xanthates (MADIX) polymerization

Perrier

Takolpuckdee

2005

J. Polym. Sci. A Polym. Chem.

1,145

1,042

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Among the living radical polymerization techniques, reversible addition-fragmentation chain transfer (RAFT) and macromolecular design via the interchange of xanthates (MADIX) polymerizations appear to be the most versatile processes in terms of the reaction conditions, the variety of monomers for which polymerization can be controlled, tolerance to functionalities, and the range of polymeric architectures that can be produced. This review highlights the progress made in RAFT/MADIX polymerization since the first report in 1998. It addresses, in turn, the mechanism and kinetics of the process, examines the various components of the system, including the synthesis paths of the thiocarbonyl-thio compounds used as chain-transfer agents, and the conditions of polymerization, and gives an account of the wide range of monomers that have been successfully polymerized to date, as well as the various polymeric architectures that have been produced. In the last section, this review describes the future challenges that the process will face and shows its opening to a wider scientific community as a synthetic tool for the production of functional macromolecules and materials.

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“…However, copolymers capable of forming thick, dense layers via physisorption have been identified. 24, 25 A notable example is PEO−PPO−PEO triblock copolymers, which are well established for stabilizing hydrophobic colloids in aqueous media. 11,25,26 While a number of studies have investigated the phase behavior and emulsion stabilizing ability of zwitterionic copolymers, 27−30 less have explored their use as colloidal stabilizers.…”

Section: ■ Introductionmentioning

confidence: 99%

“…24, 25 A notable example is PEO−PPO−PEO triblock copolymers, which are well established for stabilizing hydrophobic colloids in aqueous media. 11,25,26 While a number of studies have investigated the phase behavior and emulsion stabilizing ability of zwitterionic copolymers, 27−30 less have explored their use as colloidal stabilizers. 31,32 Many studies have explored synthesis of novel polymers, but none have systematically studied connections between layer properties, interactions, or effects on colloidal aggregation and deposition.…”

Section: ■ Introductionmentioning

confidence: 99%

“…First-principles design of copolymer compositions and architectures is not trivial based on a complex balance of segment, solvent, and surface interactions. However, copolymers capable of forming thick, dense layers via physisorption have been identified. , A notable example is PEO–PPO–PEO triblock copolymers, which are well established for stabilizing hydrophobic colloids in aqueous media. ,, While a number of studies have investigated the phase behavior and emulsion stabilizing ability of zwitterionic copolymers, − less have explored their use as colloidal stabilizers. , Many studies have explored synthesis of novel polymers, but none have systematically studied connections between layer properties, interactions, or effects on colloidal aggregation and deposition.…”

Section: Introductionmentioning

confidence: 99%

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kT-Scale Interactions and Stability of Colloids with Adsorbed Zwitterionic and Ethylene Oxide Copolymers

et al. 2018

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We report synthesis of novel zwitterionic triblock copolymers and direct measurements of their interactions when adsorbed to colloids and surfaces. We investigate triblock copolymers with poly(2-methacryloyloxyethylphosphorylcholine) (PMPC) end blocks separated by a poly(propylene oxide) (PPO) center block, with comparison to poly(ethylene oxide) PEO–PPO–PEO analogues. Interaction potentials are measured for a molecular weight series of PMPC and PEO copolymers adsorbed to hydrophobic colloids of varying diameter and planar surfaces. Findings indicate that, for the same number of repeat units, PMPC brushes generate repulsion at several times the distance of PEO brushes. PEO brush dimensions and interactions show good agreement with polymer brush models, whereas PMPC interactions suggest layer architectures with chain extensions approaching the PMPC block contour length. While PEO blocks must have 2–3 times as many repeat units to generate the same thickness as PMPC blocks, PMPC and PEO layers of the same thickness generate equivalent interactions and colloidal stability.

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Recent Advances in the Synthesis and Rearrangement of Block Copolymer Brushes

Cited by 7 publications

References 0 publications

Testing the minimum thermal conductivity model for amorphous polymers using high pressure

Testing the minimum thermal conductivity model for amorphous polymers using high pressure

Macromolecular design via reversible addition–fragmentation chain transfer (RAFT)/xanthates (MADIX) polymerization

kT-Scale Interactions and Stability of Colloids with Adsorbed Zwitterionic and Ethylene Oxide Copolymers

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