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The dimensional stability of molded thermoplastic articles is a function of the extent to which stresses are frozen into them on molding. The kind and amount of plasticizer included in the material to be molded may be varied to minimize the amount of these stresses. Methods of obtaining fundamental information about polymer–plasticizer systems from simple measurements of viscosity and osmotic pressure are suggested in this paper, and some results for cellulose derivatives are given.
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Spurlin et al. (1946) studied this question.
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