By Vladimir Kestelman, Roman Veslovsky
If you'd like a basic realizing of polymer adhesion, this booklet isn't for you. it truly is for the complex reader and is overestimated!
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The adhesion strength was determined by the method of peeling polyethylene containing different types of added surfactant off aluminum. 5 0 20 Adhesive Properties Control by Surface-Active Substances 25 It is seen that the effect of the surfactant on the adhesion strength of polymer is related not only to the surface but also to the bulk properties of surfactant. Let us now pass to considering the details of surfactant behavior in oligomeric and polymeric solutions. 2 Colloid-Chemical Properties of Surfactants in Heterochain Oligomers Consider the properties of reactive surface-active (RS) substances (alkyl phenol oxyethylated ester (OP-10), dodecyl nitrile (DDN)) and of chemically indifferent surface-active substances (IS) like the oligoamidoamines L-18, L-19, L-20 capable of reacting with such oligomeric solvents as the ED-20 and DEG-1 epoxy resins and polyoxypropylenetriol (POPT) of molecular weight 750.
For RS substances there is no threat of formation of the weak boundary layers because the polymerization of systems with RS substances does not result in separation into macrophases. The information presented was obtained under equilibrium conditions, whereas an adhesive-bonded joint is formed under nonequilibrium conditions. Taking account of the fact that in the course of adhesive polymerization there are a number of processes running at different rates, the kinetics of the cementing process must exert a fundamental effect on the properties of adhesive-bonded joints.
42 Chapter Two there appear the creation of the three-dimensional network, the compatibility of which with the low-molecular weight substances is sharply decreased. The increase of aggregation of the surfactant molecules and the transformation of micelles of one type into another one was confirmed by a study of the light scattering of the surfactant solutions of various concentrations with various levels of system conversion. Note that the oligomers investigated involve colored products that hinder the detection of the small-sized colloid particles.
Adhesion of Polymers by Vladimir Kestelman, Roman Veslovsky