Surface tension of concentrated solutions of poly-m-phenyleneisophthalamide in dimethylacetamide
A stable value of the surface tension, σ, of concentrated solutions of PPIP in DMAc is established over the course of several days after completion of the synthesis.
Heating leads to a marked increase in σ, which then relaxes to a steady value over a period of several days.
The value of σ also depends on the ratio of the components in the neutralizing mixture, diethylamine plus DMAc.
KeywordsPolymer Surface Tension Concentrate Solution DMAc Diethylamine
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