Abstract
From the results of reological studies of high polymers it has been said that the observation of creep behavior is the best way to find the presence of network.
The creep behavior of P. V. A. films without heat-treatment, which sorbed congo red in several concentrations in the dye solution, was observed.
In the low dye concentration the friction between P. V. A. polymer chains decreased in comparison with original P. V. A. film, but in the high concentration, on the contrary, it increased. Recovery behaviors of the creep were also measured, and the same phenomena as above were observed.
From the above results it may be concluded that the network structure is built in P. V. A, film by dye molecules.
