What are the properties of poly Chloroethene?
What are the properties of a polymer? Some of the useful properties of various engineering polymers are high strength or modulus to weight ratios (light weight but comparatively stiff and strong), toughness, resilience, resistance to corrosion, lack of conductivity (heat and electrical), color, transparency, processing, and low cost.
What are 3 properties of polymers? A1.1 PHYSICAL PROPERTIES
Physical properties of polymers include molecular weight, molar volume, density, degree of polymerization, crystallinity of material, and so on.
What are the uses of ethene? Uses of ethene – definition
(i) In the manufacture of many important polymers like polyethene and polyvinyl chloride (PVC). These polymers are used in the manufacture of raincoats, shoe soles, pipes and floor tiles.
What are the properties of poly Chloroethene? – Related Questions
What are the advantages and disadvantages of polymers?
They have relatively low melting and degredation temperatures, so this can be a limit for use at high temperatures. Some of polymers can degrade on sunlight and some of radiations. Strength and hardness is low compared with ceramics and metals. Modulus of elasticity or stiffness is generally low in polymers.
What are the properties and characteristics of smart polymers?
Smart polymers tend to have an all-or-nothing response, and are completely predictable, with the change being uniform throughout the material. They might alter their conformation, adhesiveness or water retention properties, and can return to their initial state when the stimulus ends.
What are the 4 types of polymers?
Terms. Synthetic polymers are human-made polymers. From the utility point of view, they can be classified into four main categories: thermoplastics, thermosets, elastomers, and synthetic fibers.
How do you change the properties of polymers?
Overall, the main ways to change and tune the properties of a polymer include changing the length of the polymer chains, creating branched chains from linear polymer chains, crosslinking the polymer chains and adding plasticizers into the polymer.
Why are polymers so strong?
The bigger the molecule, the more molecule there is to exert an intermolecular force. Even when only weak Van der Waals forces are at play, they can be very strong in binding different polymer chains together. This is another reason why polymers can be very strong as materials.
What are the properties of polymers dependent on?
Polymer properties depend on the chemicals that the polymer is made from and polymerization conditions that ultimately set molecular architecture: chemical linkage type, chain length, and the nature of the end groups. The type of the monomer-repeat unit that forms a polymer has a strong effect on polymer properties.
What is the revised classification of polymers?
The most common way of classifying polymers is to separate them into three groups – thermoplastics, thermosets, and elastomers. The thermoplastics can be divided into two types – those that are crystalline and those that are amorphous.
What is the importance of polymers?
Organic polymers play a crucial role in living things, providing basic structural materials and participating in vital life processes. For example, the solid parts of all plants are made up of polymers. These include cellulose, lignin, and various resins.
Why is ethene an important raw material?
Ethene (ethylene) is the most important organic chemical, by tonnage, that is manufactured. It is the building block for a vast range of chemicals from plastics to antifreeze solutions and solvents.
What is the main function of ethylene?
Some of the important functions of ethylene are seed germination, shoot and root growth, root development, abscission of leaves and fruits, the formation of adventitious roots, senescence of leaves and flower and sex determination.
What is the physical properties of ethene?
Ethene is a colourless gas with very light sweetish smell. It has melting point -169oC. It has boiling point -104oC. It is insoluble in water but soluble in alcohol and ether.
Are polymers good or bad?
Most polymers are safe and non-toxic. The monomers that are used to make polymers, though, are often toxic or stinky. That means that the companies that make polymers need to be very careful not to let the monomers get out before they’re made into polymers.
What is the problem with polymers?
Most polymers, including poly(ethene) and poly(propene) are not biodegradable . This means that microorganisms cannot break them down, so they: cause a litter problem if disposed of carelessly. last for many years in landfill sites.
What are the important uses of polymers in our daily lives?
Polymers become the raw materials for products we now use every day, including: synthetic clothing, fiberglass, plastic bags, nylon bearing, polyethylene cups, epoxy glue, silicone heart valves, Teflon-coated cookware and our personal favorite, polymer based paints.
What are smart and reactive polymers?
Linear and matrix smart polymers exist with a variety of properties depending on reactive functional groups and side chains. These groups might be responsive to pH, temperature, ionic strength, electric or magnetic fields, and light. Traditional drug encapsulation has been done using lactic acid polymers.
What are smart polymers examples?
Examples of smart polymers are those that undergo rapid, reversible phase changes in response to small changes in environmental conditions. Ista and Lopez employed poly(N-isopropylacryl-amide) (PNIPAAM), a polymer that is soluble in water below, but insoluble above, 32°C.
What are some examples of polymers?
Examples of synthetic polymers include nylon, polyethylene, polyester, Teflon, and epoxy. Natural polymers occur in nature and can be extracted. They are often water-based. Examples of naturally occurring polymers are silk, wool, DNA, cellulose and proteins.
Is DNA a polymer?
And even our DNA is a polymer—it’s made of monomers called nucleotides. The first man-made polymers were actually modified versions of these natural polymers.
What are the electrical properties?
Electrical properties are their ability to conduct electrical current. Various electrical properties are resistivity, Electrical conductivity, temperature coefficient of resistance, dielectric strength and thermoelectricity.
What are the chemical properties of polymers?
Melting point, boiling point, strength, hardness, density, color, opaqueness, transparency, and electrical conductivity are among the physical properties they might mention. Chemical reactivity such as combustion and biodegradability are common chemical properties.
How do plasticisers affect the properties of polymers?
Plasticizers are low molecular weight substances added to a polymer solution to promote its plasticity and flexibility. This is a temperature at which a polymer transforms from a hard, glassy material to a soft, rubbery material. Plasticizers lower the glass transition temperature of the polymers.