Tackiness of GR-S and Other Elastomers

Abstract

The deficiency of GR-S in ``tackiness'' resulted in a great deal of work in the rubber industry to improve this complex property, but practically all the work had to be evaluated by qualitative ``hand tests'' because quantitative tests were not available. An analysis of the factors involved in the ``tackiness'' of various materials showed that different factors were critical in the so-called ``tackiness'' of rubber, paints, and varnishes, printing inks, adhesive tapes, etc. A quantitative test was developed to measure the effects of rate of removal on the adhesion or ``tackiness'' of pressure-sensitive adhesive tapes over a 106-fold range of rates. This showed why the results of standard ``adhesion tests'' of tapes do not predict the relative behavior of the tapes under small forces acting for long times. Another test was developed for the measurement of the ``tackiness'' of GR-S rubber which correlates well with the judgment of tackiness by hand tests and it even works reasonably well with rough samples taken from a laboratory mill. With this test, the effects of mastication conditions, aging, and of the addition of softeners and tackifiers on ``tackiness'' of GR-S (with and without carbon black) were studied. The German tackifier ``Koresin,'' which is now manufactured in this country, was found to be far more effective than rosin and similar materials formerly used, and gave a tackiness approaching that of natural rubber.

Efficacy of Novel Nanoclay in Autohesive Tack of Brominated Isobutylene-co-p-Methylstyrene (BIMS) Rubber

“…In literature, it has also been shown that addition of reinforcing fillers such as carbon black can substantially increase the tack strength of elastomers [11][12][13].…”

“…On the other hand, addition of carbon black to styrene butadiene rubber (SBR) resulted in a significant reduction in the tack strength [1]. It was already established by Busse et al that SBR used in their study could not readily achieve bond formation due to the unfavorable intrinsic characteristics of the elastomer such as molecular weight and viscosity [12]. The addition of filler further restricts the chain mobility, reducing the interfacial interactions leading to lower tack.…”

Effect of topology on the adhesive forces between electrospun polymer fibers using a T-peel test

“…The peel test is a simple and commonly used method to quantify bulk adhesion between two surfaces . A fracture mechanics interpretation of the adhesive's detachment is used to obtain and compare the adhesive strength and energy of specimens tested in different peel configurations .…”

Comparison of the Effect of a Hydrocarbon Oil and a Terpene Tackifier on the Autohesion of Styrene-Butadiene Rubber

“…It is an important property of contact adhesives as well as for rubbery compositions used in the manufacture of multilayer composites such as tires. [1][2][3][4][5] When a conventional adhesive joint is formed, the adhesive is fluid to hasten wetting, and then sets by chemical or physical action to strengthen. However, in 96 G. R. HAMED AND G. D. ROBERTS autohesion the material remains in the same state during, and subsequent to, bond formation.…”