Plastic materials making

The main production systems of the plastic materials are:
The polymerization is the union of simple molecules, called monomers, strongly reactive. The process is triggered by temperature, by the pressure and by specific reagents or catalysts. If exothermic reactions occur, heat must be removed.
The polymer that is set up has the same chemical characteristics of the starting monomer , it only has a higher molecular mass.
The polycondensation is a reaction between different and highly reactive monomers. During the reaction develops water.
Polycondensation has a progressive course and may be terminated at will, creating materials with different characteristics.
The polyaddition is another chemical process to form plastic materials and is due to linkage of different components as a result of hydrogen atoms displacement.
It 'important to emphasize that the combination of various polymers produce a number of very different materials. You can then change the properties of materials, for example by increasing the hardness or impact strength, heat resistance or weather resistance, etc..