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A method of measuring tackiness
Author(s) -
Kambe Hirotaro,
Kamagata Kazuo
Publication year - 1969
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1969.070130310
Subject(s) - rosin , activation energy , materials science , polyethylene , composite material , polytetrafluoroethylene , polymer chemistry , brass , ultimate tensile strength , methyl methacrylate , analytical chemistry (journal) , thermodynamics , copolymer , chemistry , polymer , organic chemistry , copper , resin acid , metallurgy , physics
For measuring the tackiness of viscous materials to the solid surface, we designed an attachment to the tensile tester driven with constant speeds. Blends at high molecular weight polyisobutylene with low molecular weight polyisobutylene or with a hydrogenated rosin were used as samples. The maximum force f b at the time t b of the force‐time relation recorded on a chart was determined as a measure of the tackiness. The relation between f b and t b satisfies the equation f b ∝ t b −1/2 derived by Eley. The f b depends on the time t c and the pressure p c at contact, the temperature and the rate of sepration, r, and the rosin content of the sample. The activation energy, obtained from the slope of plots of f b against the reciprocal of the absolute temperature shows a value of 2–6 kcal/mole, which is similar to the activation energy of the viscous flow. To decide whether the failure occurs at the interface or within the adhesive itself, f b was measured with cylinders made of various materials such as polytetrafluoroethylene, polyethylene, poly(methyl methacrylate), and brass.