(7)High Polymer Solution I Osmometer
نویسندگان
چکیده
منابع مشابه
An automated osmometer.
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A description is given of a simple, rugged instrument for determining the osmotic pressure developed by a solution of a high polymer. Other small osmometers described previously [1, 2, 3, 4, 5]/ have been, in some respects, too inconvenient to use. Although relatively easy to make, glass osmometers are fragile and may require frequent repairs. Small metal osmometers, in addition to being rugged...
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Up to this point we have considered polymer chains in solvent at various concentrations. In dilute solution, we observed that the segmental density is localized around the center of mass of the coils; the local concentration gradient experienced by each chain drives the swelling of the coils. By contrast, in polymer melts, this swelling force is exactly cancelled by analogous forces exerted by ...
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For concentrated polymer solutions, the free energy of mixing can be described through a “regular solution” model, such as that set forth by Flory, for a mixture of nc polymers and ns solvent molecules. To understand how the model breaks down for lower concentrations, it will be helpful to review its essential features. It is convenient to derive such a model using a lattice construct, though t...
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ژورنال
عنوان ژورنال: The Journal of the Society of Chemical Industry, Japan
سال: 1952
ISSN: 0023-2734,2185-0860
DOI: 10.1246/nikkashi1898.55.14