Download e-book for iPad: Adhesion of Polymers by Vladimir Kestelman, Roman Veslovsky

By Vladimir Kestelman, Roman Veslovsky

ISBN-10: 0071370455

ISBN-13: 9780071370455

If you would like a common knowing of polymer adhesion, this publication isn't for you. it's for the complex reader and is overvalued!

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2, surfactant aggregation must provide for the compatibility of the colloid particles with the oligomer. Upon achieving the limiting size of the colloid particles and with increasing polymerization of the oligomer, the concentration of particles per unit volume of the solvent increases, causing loss of stability and producing aggregation with formation of a separate phase. Separation of surfactant from the polymer results in the abrupt increase of its concentration in the surface layer; when the system becomes incompatible a decrease in its surface tension is observed.

4 Surface Tension of Curing Oligomers The chemical composition as well as molecular weight and structure changes when the oligomer is being cured. In the course of reaction of the epoxy resin with amines, the epoxy groups are replaced by hydroxyl groups; when polyesters react with isocyanate, the hydroxyl and isocyanate groups are replaced by urethanes, and so on. 5% solution of L-19 in DEG-1. the surface tension, this stage occurring for longer time at higher surfactant concentration. As noted above, the colloid-chemical behavior of RS substances does not differ from that of IS substances when there is no chemical interaction of RS substances with oligomer.

5-fold, although these substances are of similar structure. One can assume that the OP-10 molecules form associations with the DEG-1 molecules that result in considerable increase of the area occupied by a molecule on the surface. Let us calculate the area that should be occupied by OP-10 molecules in an extremely saturated adsorption layer. The effective area of the normal cross-section of the hydrocarbon chains for benzene derivatives (according to structural analysis) is 23:8 Â 10À10 m2 , and the distance between the axes of two oriented chains in the saturated layers is not less than ð4:5À6Þ Â 10À10 m.

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Adhesion of Polymers by Vladimir Kestelman, Roman Veslovsky

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