Vapour pressure of polymer solution

To compare the vapour pressure of solutions of rubber in benzene with the Flory-Huggins formula. 

The vapour pressure of solutions of rubber in benzene has been measured at 25 C bj Gee and his collaborators (Gee and Treloar, Trans. Faraday Soc. 1942, 38,147 Gee and Orr, Trans. Faraday Soc. 1946,42, 507 supplemented by private communication from Dr. Gee). Values of the ratio of the vapour pressure f of the solution to the vapour pressure of pure benzene for various values of the volume fraction q of rubber are given in table 1. 

We obtain a satisfactory straight line of slope 0.43 and accordingly assume /S = 0.43 

We shall now compare calculated with experimental values of For this purpose we construct table 3. The agreement is usually, but not always, better than 1%. 

The use and significance of the formula here used has been reviewed by Gee ( Advances in colloid science . Interscience, 1946, vol. 2, p. 168 J. Chim. phys. 1947,44, 70). 

---