Effect of acid on the aggregation of poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) block copolymers

Article Abstract:

Transmission electron microscopy (TEM), particle size analyzer (PSA), Fourier transformed infrared and fluorescence spectroscopy are used to investigate the acid effect on the aggregation of poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) block copolymers E[O.sub.20]P[O.sub.70]E[O.sub.20]. It is attributed to the aggregation of micelles through the protonated water bridges between different micelles through hydrogen bonds.

Usage, Oxides, Transmission electron microscopes, Block copolymers, Report

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Detailed structures and mechanism of polymer solvation

Article Abstract:

A model system, polyethylene (PE) in biphenyl is simulated, to gain the insight into the detailed solvation structures and the molecular mechanism of polymer chain solvation. Using atomistic molecular dynamics (MD) simulation, it is found that when the biphenyl is far from PE chain or in the bulk, the dihedral angle of the two rings in the solvent molecule are 32 degree.

Analysis, Polymers, Solvation

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