W

In particular, copolymers consisting of three different reiterative monomers are known as terpolymers. A typical example is ABS, i.e. acrylonitrile-butadiene-styrene terpolymer.

The chemical reaction of copolymer synthesis is copolymerization, and the joined monomers are comonomers. These combinations of monomers are intended to modify the properties of the original monomers or polymers.

Plastics (Greek: suitable for molding) are polymers that during some manufacturing stage are brought to the liquid state to be molded by heat or pressure in a mold. Once the parts have solidified, the material is chemically very stable under normal environmental conditions.

Synthetic resins are a group of synthetic substances whose properties resemble those of natural resins. Resins generally have the consistency and appearance of a viscous or pasty liquid at room temperature and soften on heating.

Examples of polymers

Semi-synthetic polymers: These are polymers obtained by the chemical transformation of natural polymers, without appreciably destroying their macromolecular nature. Ex: artificial silk obtained from cellulose.

Homopolymers. These are macromolecules formed by the repetition of identical monomeric units, i.e. they do not contain heteroatoms. Within this group of polymers, five main families can be distinguished: polyolefins, polystyrenes, unsaturated polymers (polyenes), polyvinyls and polyacrylics. Cellulose and rubber are natural homopolymers. Polyethylene and PVC are synthetic homopolymers.

Copolymers. These are macromolecules made up of two or more different monomer units. Silk is a natural copolymer and Bakelite is a synthetic copolymer.  The most common copolymers are formed by two different monomers that can form four different combinations.  If the monomers are randomly grouped together, the polymer is called a random copolymer.  If they are placed alternately, an alternating copolymer is obtained.  If, for example, two monomers of one type and three monomers of the other are grouped alternately, a block copolymer is formed.  If you start from a linear chain formed by one monomer and add branches of another monomer, you obtain a grafted copolymer.

Read more  What is high pressure processing used for?

Polymer materials

In particular, copolymers consisting of three different reiterative monomers are known as terpolymers. A typical example is ABS, i.e. acrylonitrile-butadiene-styrene terpolymer.

The chemical reaction for the synthesis of copolymers is copolymerization, and the joined monomers are comonomers. These combinations of monomers are intended to modify the properties of the original monomers or polymers.

Plastics (Greek: suitable for molding) are polymers that during some manufacturing stage are brought to the liquid state to be molded by heat or pressure in a mold. Once the parts have solidified, the material is chemically very stable under normal environmental conditions.

Synthetic resins are a group of synthetic substances whose properties resemble those of natural resins. Resins generally have the consistency and appearance of a viscous or pasty liquid at room temperature and soften on heating.

Synthetic polymers examples

Polymers are a set of macromolecules, usually organic, resulting from the union of simpler molecules called monomers by means of covalent chemical bonds. They are long molecular structures linked together by various forces (hydrogen bridges, Van der Waals forces or hydrophobic interactions).

Polymers can be of natural or synthetic origin, but they are always the result of a process called polymerization, in which phenomena such as temperature, reaction time or the nature of the monomers determine the length of the resulting polymer chain.

These complex structures are vital to the evolution of complex living things (the DNA molecule is a polymer), as well as highly versatile organic industrial substances such as plastics and other petroleum derivatives.

Polymers usually have the reactivity of the molecules that constitute the monomers at the ends of the chains. Synthetic polymers are not very reactive, although the presence of acids and organic solvents tends to corrode them rapidly.

Read more  What is process synthesis?