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- Sep 04, 2018 -

Glue is a substance that can stick two objects together. Glue does not exist on its own. It must be applied between two objects to make it stick. The chemical composition in the glue, in a water-based environment. The polymer in glue (vinyl acetate in white glue is a type of petroleum derivative) is a round particle with a normal radius between 0.5 and 5 cycles m. Object bonding is achieved by the tension between the polymer in the glue. In the case of glue, water is the carrier of a medium polymer, which is slowly immersed into the tissue. When the water in the glue disappears, the polymer in the glue relies on the tension between the two objects. In the use of glue, too much glue will make the polymer in the glue crowded together. There is no good tension between the polymers. Polymer bodies crowd each other, making them less attractive to each other. At the same time, the water between the polymer is not easy to evaporate. This is why "the thicker the film, the worse the adhesive strength of the glue." The amount of glue is too much, and the glue plays a role of "filling" rather than adhesion. The adhesion between objects depends not on the adhesive force of glue, but on the "cohesive force" of glue. If it's not water soluble, the principle is much the same, just replace water with another solvent.