Adhesion of Polymers by Vladimir Kestelman, Roman Veslovsky

By Vladimir Kestelman, Roman Veslovsky

If you would like a common figuring out of polymer adhesion, this e-book isn't for you. it really is for the complicated reader and is overvalued!

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In so doing, the rise in OAA concentration in the system results in more intensive formation of reaction products and an increase of the micelle failure rate. Actually, the measurements of the optical density of the DEG–PEPA system cured with L-19 indicate that increase in the surfactant concentration does not result in noticeable increase of the optical density of the cured system. , OP-10 or DDN. Thus, despite the similarity of the surface tension changes of systems that incorporate RS and IS substances, the observed phenomena are based on different mechanisms.

As shown above, the solubility of PR in the system is higher than that of OAA. At the beginning of the reaction when the PR concentration is low, the PR are in the molecular-dispersed state, which is why they do not affect the determined size of the colloid particles in the system. As Fig. 5 shows, in the early stages of the reaction there is an abrupt decrease of the particle concentration while their size does not change significantly. Once the concentration of the PR molecules formed exceeds CCMF, a decrease of the particle size is observed such that the size of the PR aggregates is smaller than that of OAA.

Depending on the reaction time, the character of the alteration of the surface tension is similar for DEG–PEPA systems that contain OP-10 or L-19. 3. , OP-10. 5), which is why the decrease of the surface tension cannot be caused by the separation of surfactant from the system. 2) 52 Chapter Two The products of the reaction between DEG-1 and L-19 have higher solubility in the oligomer, and the extent of their aggregation in the course of micelle formation is much lower than that of the initial surfactant.

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