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The wear of an adhesive tape as it slides across a substrate can be estimated using Archard's Law of Adhesive Wear, where and are the hardness and wear coefficients of the adhesive tape, is the distance the adhesive is dragged across the substrate surface, is the total normal load acting on the adhesive tape, and is the volume of the adhesive ...
Some removable adhesives are designed to repeatedly stick and unstick. They have low adhesion and generally cannot support much weight. Sometimes clean removal of pressure sensitive tape can be difficult without damaging the substrate that it is adhered to. Pulling at a slow rate and with a low angle of peel helps reduce surface damage.
Epoxy value derives from the Epoxy equivalent weight (EEW) or Weight Per Epoxide (WPE) and is a measure of the epoxy content of an epoxy resin or epoxy reactive diluent, or glycidyl ether. [1]
The Mapei Group has been publishing a two-monthly magazine in Italian and English since 1991. Adriana Spazzoli was the editor-in-chief of the magazine called Realtà Mapei for 28 years until 2019. 160,000 copies of the magazine are distributed all over Italy and 22,000 copies of Realtà Mapei International are published worldwide.
where is the heat released up to a certain time , ˙ is the instantaneous rate of heat and is the total amount of heat released in , when the reaction finishes. [ 9 ] Also in this case the degree of curing goes from zero (no bonds created) to one (no more reactions occur) with a slope that changes in time and has its maximum about at half of ...
There are two types of adhesives that harden by drying: solvent-based adhesives and polymer dispersion adhesives, also known as emulsion adhesives. Solvent-based adhesives are a mixture of ingredients (typically polymers) dissolved in a solvent. White glue, contact adhesives and rubber cements are members of the drying adhesive family. As the ...
The contact angle (θ), as seen in Figure 1, is the angle at which the liquid–vapor interface meets the solid–liquid interface, and is determined by the balance between adhesive and cohesive forces. As the tendency of a drop to spread out over a flat, solid surface increases, the contact angle decreases.
A uniform polymer (often referred to as a monodisperse polymer) is composed of molecules of the same mass. [5] Nearly all natural polymers are uniform. [6] Synthetic near-uniform polymer chains can be made by processes such as anionic polymerization, a method using an anionic catalyst to produce chains that are similar in length.