Ordering transition of block copolymer films

Article Abstract:

A study is carried out on the ordering temperature of poly(styrene-b-methyl methacrylate) (PS-b-PMMA) thin film diblock copolymers of thickness h less than or equal to 2L that is supported by SiO(sub x)/Si substrates, in vacuum environments. It is found that in compressed Co2 environments, these films are ordered at temperatures where the films are disordered in vacuum (or air) environment.

Atomic force microscopy, Transition state (Chemistry)

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Linear conformation of poly(styrene-alt-maleic anhydride) capable of self-assembly: A result of chain stiffening by internal hydrogen bonds

Article Abstract:

A study presents a careful conformational analysis of poly(styrene-alt-maleic anhydride) at different pH value. The findings reveal that a strong internal hydrogen bond is formed at intermediate pH, which indicate a change in the conformation of the polymer chain, which finally becomes linear.

Organizational history, Science & research, Research, Company restructuring/company reorganization, Reorganization and restructuring, Conformational analysis, Hydrogen bonding, Hydrogen bonds, Hydrogen-ion concentration, Company organization, pH

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Aggregation of ionic surfactants to block copolymer assemblies: A simple fluorescence spectral study

Article Abstract:

A simple method based on steady-state fluorescence spectral measurement which could be used to study the interaction mechanism of copolymers and ionic surfactants is demonstrated.

Surface active agents, Surface Active Agent Manufacturing, Chemical synthesis, Fluorescence spectroscopy

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