Thermoset materials are those materials that are made by polymers joined together by chemical bonds, acquiring a highly crosslinked polymer structure. The highly crosslinked structure produced by chemical bonds in thermoset materials, is directly responsible for the high mechanical and physical strength high strength to support high stress or load, temperature compared with thermoplastics or elastomers materials. On the other hand is this highly crosslinked structure which provides a poor elasticity or elongation of these materials. Imagine that on a table we have a set of strings mixed with each other, each of these strings is what we call polymer, we introduce some effort if we want to separate the strings from each other, now began to make knots between each of the strings, we see that as more knots made more ordered and rigid becomes all the set of the strings, in this example the knots represent the chemical bonds, which make the polymers to be strongly linked each other and form highly cross-linked polymeric structures.
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