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Chemicals, plastics and rubber industries

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Dissociation constant of a weak electrolyte in charged membrane

Article Abstract:

The Donnan equilibrium theory was used to measure the dissociation constant (K) of acetic acid as a weak electrolyte in an ion-exchange membrane. The K in the cation exchange was found to be on the order of 10(super -4) and larger than that in water. Results also revealed that the value of K increases as the concentration in the external solution increases and decreases with an increase in the fixed charge density.

Author: Tanioka, Masato, Yoshie, Kiyonori, Kawaguchi, Misako, Hamada, Masato
Publisher: American Chemical Society
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 1998
Ion exchange, Electrolytes, Acetic acid, Dissociation, Dissociation reactions

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Near-edge x-ray absorption fine structure spectroscopy of MDI and TDI polyurethane polymers

Article Abstract:

A study was conducted to analyze the sensitivity of near-edge X-ray absorption fine structure to differences in key chemical components of polyurethane polymers. The polymers were chosen to isolate particular chemical environments present in complex polyurethane polymers. Results indicated that differences in phenyl ring substitution promote significant variations in transition energies and character.

Author: Urquhart, Stephen G., Hitchcock, Adam P., Rightor, Edward G., Smith, Archie P., Ade, Harald W., Lidy, Werner
Publisher: American Chemical Society
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 1999
Polymers, Polyurethanes

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