TABLE OF CONTENTS Eastman Performance Plastics: Tenite 3754000012
A study was conducted to determine the bond strength of a representative matrix of plastics and the adhesives best suited to them. The block-shear (ASTM D 4501) test was used because it places the load on a thicker section of the test specimen; the specimen can therefore withstand higher loads before experiencing substrate failure. In addition, due to the geometry of the test specimens and the block shear fixture, peel and cleavage forces in the joint are minimized.
The substrates were cut into 1" 1" 0.125" (25.4 25.4 3.175 mm) block shear test specimens. All bonding surfaces were cleaned with isopropyl alcohol. The test specimens were manually abraded using a 3M heavy-duty stripping pad. The surface roughness was determined using a Surfanalyzer 4000 with a traverse distance of 0.03 inches (0.76 mm) and a traverse speed of 0.01 inches/second (0.25 mm/s).
While the bond strengths in Table 21.1 give a good indication of the typical bond strengths that can be achieved, as well as the effect of many fillers and additives, they also face several limitations. For example, while the additives and fillers were selected because they were believed to be representative of the most commonly used additives and fillers, there are many types of each additive and filler produced by many different companies, and different types of the same additive or filler may not have the same effect on the bondability of a material. In addition, the...
