Classification of Polymers
a. Biological Polymer
This polymers are natural polymer, produced from the cells of living organism. They consist of monomeric units by covalently bonded to form a large molecule.
There are mainly 3 types of Bio-polymer-
i. Poly-nucleotides- DNA, RNA etc.
ii. Poly peptides- Collagen, Actin, Fibrin.
iii. Poly saccharides- Starch, Cellulose, Alginate etc.
b. Industrial Polymer- They are provide in fibers, plastics, rubbers, elastomers, adhesive.
Read More about Polymerization
B. According to the different points of view-
a. On the basis of origin
i. Natural polymer- Cellulose, Fibroin, Keratin, Cotton, Silk, Wool, Rubber etc.
ii. Semi-synthetic polymer- Viscose rayon, Acitate rayon, casein, Albumins Glue etc.
iii. Synthetic polymer- Polyethylene, Polyester, Nylon, Polystyrene etc.
b. On the basis of chemical nature
i. Organic- Polymer having carbons atoms in its main backbone. Such as- polyethylene, polypropylene, polyester, Nylon etc.
ii. Inorganic- Polymer having another atom without carbon in its main chain.- Silicon, Glass etc.
C. On the basis of chemical reaction mechanism
i. Chain/ Addition polymer- Polyethene, PVC.
ii. Step/Condensation polymer- Polyester, Nylon etc.
D. On the basis of the behavior of polymer towards that-
i. Thermoplastic- These polymers are softer on heating and solidified in cooling. Such as- polyester, nylon etc.
ii. Thermosetting- This polymers are harden during formation but once they became insoluble or infusible. Example- Urea formaldehyde, Melamine formaldehyde etc.
E. On the basis of repeat unit present in main chain
i. Homo polymer- If one type of repeat unit present in the main chain of a polymer, then it is called Homo polymer. Such as- Polystyrene, Poly Stillbene etc.
ii. Co-polymer- If more one type of repeat unit present in the main chain of a polymer then it is called co-polymer. Such as- Poly(styrene-co-stilbene).
F. On the basis of structure
G. On the basis of side chain/ tacticity
i. Isotactic- The polymers whose side chains are arranged in one side of its main chain alternately is called Isotactic.
ii. Syndiotactic- The polymer whose side chains are arranged in both side of it’s main chain alternately is called syndiotactic.
iii. Atactic- The polymer whose side chains are arranged in both side of it’s main chain randomly is called Atactic.
H. On the basis of and users
i. Fiber- Cotton, Nylon, Polyester etc.
ii. Elastomer- Spandex
iii. Plastic- PVC