Abstract
In previous publications one of us developed the concept of the electrical theory of adhesion. On the other hand, many authors have repeatedly expressed opinions concerning the role of diffusion processes during the formation of adhesive and auto-adhesive bonds. Owing to the discussion of this problem an experimental investigation of the formation of adhesive bonds acquired special significance, in particular during the addition of two high molecular materials for the purpose of clarifying the correlation of electrical and diffusion processes in the phenomena of adhesion. The shape of the adhesiogram is very significant in solving the question of the type of adhesive bond. The effect of the velocity of rupture is comparatively small if the adhesive bond depended on the phenomenon of diffusion. If the adhesive bond is of electrical nature the adhesiogram has generally three clearly expressed sections. With the aid of a roller adhesiometer we have taken the adhesiograms of a series of polymers (gum type BF, polyurethans, polyamides, a series of vinyl polymers, rubbers, guttapercha, cellulose esters, and on.). The adhesiograms of different combinations of these polymers with glass, metal and with rubbers of a Na butadiene and acrylo nitrile rubber base usually gave three clearly expressed regions. However, in some cases there were only two sections and the third was absent. Three probably exist in all but some may be located in an area of significant velocity and experimental determination becomes difficult. Under our experimental conditions of a time interval <0.01 sec some could not be measured.
309 Role of three-dimensional transvaginal ultrasound and diffusion-weighted magnetic resonance imaging for assessment of myometrial invasion in patients with low-risk endometrial cancer
