Coupling agent

Coupling agent is a kind of material with gender structure, it is a part of molecular groups can react with chemical groups on the surface of the inorganic matter, form a strong bond, another part of the group has the nature of organic matter, can react with organic molecules or physical wound, and the nature of the two kinds of different material firmly together.This makes sources, the price is cheap or specific performance inorganic as filling agent and strengthening agent use of plastic, not only can reduce the cost of plastic, and gives products other valuable performance, such as improve the mechanical properties, dimension stability, etc., to expand the application range of the plastic.
There are many kinds of coupling agent, the commonly used have titanate and silane, etc.Titanate coupling agent molecules contains an oxygen and three long chain alkanes molecular structure units, when the coupling agent and powder filler, alkoxy gain packing on the surface of the proton and the protons from the packing of bound water, including water of crystallization, chemical adsorption and physical adsorption of water, water to form a chemical bond, the filler coated on the surface of coupling agent molecules.And coupling agent on the other side of the molecular structure of three long chain unit with chemical crosslinking polymer molecules or physical wound, eventually combine inorganic fillers and polymer is very good, and improved the tensile strength, elongation and impact strength.At the same time, the effect of coupling agent can reduce the surface of the packing, improve the ability of filler dispersed in the resin, reduces the viscosity of filling system, increase the filling amount, reduced the mechanical wear and tear, saving power consumption, and also reduces the cost.

(source:http://www.ac-chem.net/news/coupling-agent-a1a4.html)