Present situation of the application of polymer rheology to industrial problems was discussed from a macroscopic point of view, and it was concluded that it still remains below the level we can reasonably expect. It was also pointed out that two sets of systems of different principles are generally standing in parallel for testing materials; namely the traditional one modified originally from that for steel and iron and the new one based on the application of polymer rheology. Two pieces of

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... osal were then recommended to raise the level up to that expected. The first one is the use of the material parameters of the phenomenological rheology model to characterize the rheological properties of polymer samples when the chemists employ the black-box technique to optimize the polymerization recipe. The second one is to reconstruct the entire series of traditional performance tests by the application of polymer rheology and others so as to reproduce substantially the mechanical excitation in service condition. Practical ways of approach of the proposal were also discussed somewhat in detail.