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An apparatus is described for the measurement of the vapor pressures and concentrations of high polymer solutions. Results are given for the poly(vinyl acetate)‐benzene and poly(vinyl acetate)‐vinyl acetate systems. For both, the interaction constant, χ12 , decreases linearly as the volume fraction of polymer increases from 0.4 to 0.9.
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Nakajima et al. (1959) studied this question.
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