1. IntroductionPolymer materials play a functional role in every aspect of daily life, from clothing to infrastructure. Polymers differ greatly from other materials, such as ceramics or metals, based on bond types. Metals bond metallically, creating a sea of ​​electrons, and ceramics typically bond ionicly, strongly binding electrons to points in the lattice. Polymers bond covalently into carbon chains, which (in general) makes their properties more variable due to the possibilities for arrangement in terms of length, angle, and molecular configuration. Polymers, on average, tend to be lighter, have a greater color gamut, lower thermal and electrical conductivity, less brittleness, more resistance to acids, bases and moisture and dielectric strength higher than their ceramic or metallic counterparts, but with great range. This variety of properties leads to a variety of classifications, and therefore to different processing methods based on the classification of the polymer.2. Polymer ClassificationsPolymer processing differs significantly depending on the category of polymer within the system. Polymers can be classified according to their chemical composition, their structure or their behavior in tests (thermal or mechanical).2.1. By chemical composition Most polymers are organic molecules, based on a repeating carbon skeleton, but can also include other elements within the chain, most often oxygen, nitrogen or sulfur. The basic unit of a polymer chain is known as the monomer or mer. The composition of the monomer will greatly affect the properties shown. Monomers can be natural or created synthetically. Examples of common monomers can be seen in Figures 1 to 4. Within the monomer, the electronegativity and bonding properties of the constituent e...... middle of paper ......, experts. “INTRODUCTION TO POLYMER ADDITIVES AND STABILIZATION.” “CES EduPack.” Granta, 2013. Colton, Prof. JS “Injection Molding”. Injection molding. Georgia Institute of Technology, 2009.—. “Polymer processing”. Polymer processing. Georgia Institute of Technology, 2009.—. “Review of Polymers.” Polymer Review. Georgia Institute of Technology, 2011. Kailas, Professor Satish V. Materials Science. Indian Institute of Science, Chapter 11. Polymer Applications and Processing. “Rotary Wheel Blow Molder.” http://upload.wikimedia.org/wikipedia/en/thumb/4/40/Rotary_Wheel_Blow_Molder.png/450px-Rotary_Wheel_Blow_Molder.png. William D. McCallister, David G. Rethwisch. Materials science and engineering: an introduction. John Wiley and Sons, Co., 2009. Zehev Tadmor, Costas G. Gogos. Principles of polymer processing. Hoboken, New York: John Wiley and Sons, Inc..., 2006.