ARTICLE
POLYMER CHEMISTRY-APPLICATION OF POLYMER IN OUR DAILY LIFE
ABSTRACT
Polymer is now turning into an inevitable part of our existence that can not be replaced by means of every other material. Polymers are broadly used superior materials, which are discovered nearly in every cloth utilized in our each day existence. So far, the importance of polymers has been lots greater highlighted due to their applications in specific dominions of sciences, technology, and industry – from primary makes use of biopolymers and healing polymers. Polymers are very huge molecules, or macromolecules, formed by means of the union of many straightforward structural units, which typically are derived from monomers. Additionally, they are a great deal more analyzed with the aid of scientists nowadays as compared to the beyond as they are very important and there's no different molecule that can update them. This is because of the reality that they have got a huge utility in special aspects of sciences, technologies, and enterprise. The massive utility of these polymers has resulted in many environmental issues and worries and is likewise threatening every person’s fitness as a end result. this article portrays the critical application of polymers in our everyday lifestyles
INTRODUCTION
Polymer Chemistry is a multidisciplinary technological know-how that arranges the compound aggregate and chemical houses of polymers.The polymers, a word that we hear about it a lot, may be very crucial and one can not believe the lifestyles without it. Polymers, a huge elegance of substances, include many small molecules called monomers which can be connected collectively to shape long chains and are utilized in quite a few merchandise and items that we use in everyday existence.
For decades, people used polymers in their life but they did not realize it properly until global battle II. There have been highly few materials available for the manufacture of the thing wanted for a civilized lifestyle. metal, glass, wood, stone, brick, and urban for most of the construction and cotton, wood, jute, and a few different agricultural products for clothing or fabric manufacture have been used.
The rapid increase in call for synthetic merchandise introduces the new substances. These new materials are polymers, and their effect on the existing way of lifestyles is nearly incalculable. Product crafted from polymers are all around us: clothing made from synthetic fibers, polyethylene cups, fiberglass, nylon bearings, plastic bags, polymer-based paints, epoxy glue, polyurethane foam cushion, silicone heart valves, and Teflon-coated cookware. The listing is nearly endless.
Polymers permeate each component of day by day existence, and it is tough to assume a society without artificial and natural polymers. Almost all items that surround us are composed of polymers and examples encompass clothing, vehicle elements, medicinal drug coating, transportation, and buildings creation. in addition, polymers play a big position in the development of prescribed drugs, biomedicine, molecular biology, biochemistry, and biophysics.
The phrase “polymer”, or now and again "macromolecule", is derived from classical Greek poly which means "many" and meres meaning "elements". The polymer molecule has very high molecular weight (between 10 000-one thousand 000 g/mol) and includes numerous structural devices usually certain together by way of covalent bonds.
Polymers are obtained via chemical response of monomers. Monomers have the capability to react with some other molecule from the equal type or another type in the appropriate circumstance to form the polymer chain. This method in nature has resulted in the formation of natural polymers, at the same time as the artificial polymers are man-made.
Polymers were around us in the natural world from the very beginning (e.g., cellulose, starch, and herbal rubber). guy-made polymeric substances had been studied for the reason that in the middle of the nineteenth century. These days, the polymer industry has hastily advanced and is bigger than the copper, metal, aluminum and some other industries mixed.
CONTENT
The phrase “polymer”, or from time to time "macromolecule", is derived from classical Greek poly that means "many" and meres which means "elements". The polymer molecule has very high molecular weight (between 10 000-1000 000 g/mol) and consists of several structural devices normally bound together by using covalent bonds.Polymers are received through chemical reaction of monomers. Monomers have the capability to react with any other molecule from the same kind or some other kind in the proper condition to shape the polymer chain. This technique in nature has resulted to the formation of herbal polymers, while the artificial polymers are man-made.
Polymers have been round us within the natural world because the very starting (e.g., cellulose, starch, and herbal rubber). guy-made polymeric materials have been studied since the middle of the 19th century. today, the polymer enterprise has hastily developed and is bigger than the copper, metallic, aluminum and a few different industries mixed.both natural and synthetic polymers are remarkably involved in consolation and facilitation of human existence and are responsible for existence itself, for medication, nutrition, verbal exchange, transportation, irrigation, container, clothing, recording records, buildings, highways, and many others. In reality, it's miles tough to assume human society with out synthetic and natural polymers. In our ever-increasing technological global, technological know-how performs a important role in providing solutions to critical troubles of meals, clean and ample water, air, electricity, and fitness. The information of polymers and related texts offer both the statistics and insights in their better know-how in our lifestyles. The information accrued from the basic science courses lead to information the polymers. This data consists of actual, theoretical, and sensible principles provided in science. it's far of use to individuals who want to be honestly properly knowledgeable, as well as to people who want to pursue medication, engineering, physics, chemistry, biomedical sciences, regulation, business, and many others. synthetic and natural polymers will be used in the shape of inorganic and organic polymers; coatings, elastomers, adhesives, blends, plastics, fibers, caulks, ceramics, and composites. The fundamental principles which might be implemented to at least one polymer category are implemented to all different classes together with some simple fundamental regulations. these basics are included into the fabric of the polymer texts.
CLASSIFICATION OF POLYMERS:-
On the basis of structure-LINEAR POLYMERS, BRANCHED POLYMERS, CROSS-LINKED POLYMERS
On the basis of molecular forces-Elastomers, Fibers, Thermoplastics, Thermosetting polymers
Thermoplastics: These are polymers that can be easily softened repeatedly when heated and hardened when cooled with little change in their properties. When heated due to the absence of cross-links, they become free to move and can be molded into any desired shape.EXAMPLES- Polyvinyl Chloride (PVC) and Polystyrene and Polymethyl methacrylate
Thermosets:-These are the polymers that undergo permanent change on heating and can not be remolded into our desired shape. On heating, their cross-links get highly linked with each other and become hard and infusible. EXAMPLES-Bakelite, formaldehyde etc.
PROPERTIES:-
1.Tensile strength,Higher tensile strength holds a greater weight before snapping. Tensile strength increases with polymer chain length and crosslinking of polymer chains
2.Melting point
The term melting point when applied to polymers, suggests not a solid-liquid phase transition but a transition from a crystalline or semi-crystalline phase to a solid amorphous phase.
3.Boiling point
The boiling point of a polymeric material is strongly dependent on chain length. The polymers with a large degree of polymerization do not exhibit a boiling point because they are decomposed before reaching their respective theoretical boiling point.
APPLICATIONS OF POLYMERS:-
Molecular technological know-how has evolved especially in recent eras. Molecular science has a major role in our lives. It has become a need in our each day workouts we shall speak now about the primary applications of polymers without which lifestyles weren't that easy. we are going to discuss a number of the primary polymers used in our lives.
RUBBER:-
HISTORY OF RUBBER: – Natural rubber, obtained from the sap of the hevea tree. Rubber was named by the chemist Joseph Priestley who found that a piece of solidified latex gum was good for rubbing out pencil marks on paper.
TWO TYPES OF RUBBER ARE THERE:-
NATURAL RUBBER:-
Natural rubber is a polymer of isoprene (2-methyl-1, 3-butadiene), with a joined network structure.There is no cross links between the polymer chains. It is not hard and tough. It becomes sticky and soft when heated. It can be easily deformed but regains its original shape after the stress is released. It involves a addition reaction in which one double bond in isoprene open to form a new bond with next unit forming a large chain.
VULCANIZED RUBBER:-.A chemical reaction of sulfur (or other vulcanizing agent) with rubber or plastic to cause cross-linking of the polymer chains; it increases strength and resiliency of the polymer chemically; the process involves the formation of cross-linkages between the polymer chains of the rubber’s molecules. It was invented by Charles Goodyear in 1839.The formation of cross links formed at the time of vulcanization at the reactive sites makes rubber hard, tough with greater tensile strength. It has very high elasticity, resistance to oxidation and organic solvents.
OTHER TYPES OF RUBBER:-
NEOPRENE RUBBER:-
USES: – used as insulator, making conveyor belts, printer roller belts are also made from it.
SBR (Styrene Butadiene Rubber):-Known as BUNA-S
USES: – it is used for making automobile tyres and footwears.
NITRILE RUBBER:- Recognized as BUNA-N
USES:-it is used for making oil seals, manufacture of hoses and tank linkings.
PLASTICS OR POLYHALO-OLEFINS:-
A very useful but common commodity of our life. But nowadays it has become a serious problem due to its problem of degradation which is a process which is a time consuming process. These are called polyhalo-olefins because they are derived from halogen substituted olefins.
1.POLYVINYLCHLORIDE-(PVC):-
Its monomer is unit is vinyl chloride. it is prepared by heating vinyl chloride in an inert solvent in the presence of peroxides (eg.dibenzoyl peroxides).It isa hard horny material. It is a thermoplastic polymer and its plasticity can be increased . Fig 15.0
USES:-It is used in manufacturing of rain coats, hand bags, curtain clothes, toys
Artificial flooring.
As a good insulating material in wires and other electrical goods.
For making gramophone records.
2.TEFLON:-(POLYTETRAFLOUROETHYLENE):
Tough material resistant to heat and chemical actions such as acids and bases. It is an addition polymer of tetraflouroethylene.It is bad conductor of heat.
USES:It is used as a material resistant to heat and chemical attack in household works.
For coating articles and cookware to make them non-sticky as non stick utensils
For making gaskets, pump packaging, valve, seals, non-lubricated bearings, etc.
3.POLYESTERS:-
Fibers represent a very important application of polymeric materials, including many examples from the categories of plastics and elastomers.It involves ester linkages
TYPES OF POLYESTERS(FIBRES):-
1.TERYLINE:-It is a polymer of ethylene glycol and terephthalic acid. Also known as Dacron.
USES:-For making cloth by mixing with cotton.
For making magnetic recording tapes.
2.NYLON66:-Monomers are hexamethylenediamine and adipic acid.
USES:-Used for making bristles of brushes.
In textiles and also for making sheets. It is blended with wool to make socks and sweaters.
3.NYLON 6:- its monomer is caprolactam made up of cyclohexane.
USES:-It is used in the manufacture of tyres, cords, fabrics, and ropes.
CONCLUSION
A polymer is a big molecule together with many smaller subunits known as monomers. There are exceptional sorts of polymers and plenty of uses for them all. Even though human beings may not recognise it polymers play an important role in our regular life. Polymers variety from plastics, percent, and Styrofoam to key systems within the human body like DNA and proteins which might be key components to the human frame that makes it feasible for every one of us to stay and be particular. So without polymers in our body, we'd be useless, and without them in our society, it might be notably changed for the worse to say the least.
REFERENCES
Uses of Polymer retrieved from https://www.britannica.com/science/polymerhttps://www.britannica.com/science/polymer on 25-03-2021
Classification of Polymers retrieved from
https://en.wikipedia.org/wiki/Polymer_chemistry on 25-03-2021