Water- based or water-soluble polymers are substances that dissolve, disperse, or swell in water and, thus, modify the physical properties of aqueous systems in the form of gelation, thickening, or emulsification/stabilization. They can be used in various purposes like medicine, drug delivery, concrete, painting, etc.
What are 5 examples of polymers?
Examples of Polymers Natural polymers (also called biopolymers) include silk, rubber, cellulose, wool, amber, keratin, collagen, starch, DNA, and shellac.
Which polymer is water soluble?
3.2 Gelatin-based hybrid polymer nanocomposites Water soluble polymers have a wide range of industrial applications including food and pharmaceuticals. Polysaccharide and protein based polymers were the two dominant groups among water soluble polymers.
Are synthetic polymers water based?
Water-soluble synthetic polymers contain hydrophilic functional groups, such as ether, alcohol, amide, and pyrrolidone, which are often biocompatible and nontoxic. As a result, water-soluble polymers are taking a more active role in novel applications.
What is a water based emulsion?
Water-based emulsion polymers are created by initiating a reaction between thousands of monomer units causing them to link together to form polymer chains. As these tiny spheres propagate and disperse in water, they form an emulsion.
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.
What are the examples of natural polymer?
They are often water-based. Examples of naturally occurring polymers are silk, wool, DNA, cellulose and proteins. In our previous section on network polymers, we mentioned vulcanized rubber and pectin. Vulcanized rubber is a synthetic (man-made) polymer, while pectin is an example of a natural polymer.
What are the 2 types of polymer?
Polymers fall into two categories: thermosetting plastic or thermoset. thermoforming plastic or thermoplastic.
What are the disadvantages of synthetic polymers?
They are not free from disadvantages. The raw materials used to produce them can get extinct, and disposing of synthetic polymers is a very difficult and time-consuming task. If proper care is not taken, it can result in environmental degradation.
What is synthetic polymer used for?
Uses Of Synthetic Polymers The polymer called Polyethylene is used in plastic bags and film wraps. Polyvinyl Chloride(PVC) is used in siding, pipes, flooring purposes. The synthetic polymer Polystyrene is used in cabinets and in packaging. Polyvinyl acetate is used in adhesives and latex paints.
What is the function of polymer?
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.
What are the uses of polymer?
Uses of polymers Polymer Properties Uses Poly(chloroethene) ‘PVC’ Tough, electrical insulator, can be made hard or flexible Insulation for electrical wires, windows, gutters, pipes Poly(tetrafluoroethene) ‘PFTE’ Slippery, chemically unreactive Non-stick coatings for pans, containers for laboratory substances.
What are the main types of polymers?
There are 3 principal classes of polymers – thermoplastics, thermosets, and elastomers. Differentiation between these classes is best defined by their behaviour under applied heat. Thermoplastic polymers can be either amorphous or crystalline.
What is an example of a thermosetting polymer?
Common examples of thermoset plastics and polymers include epoxy, silicone, polyurethane and phenolic. Different thermosets provide different advantages when used as a production material. For example, epoxies are highly elastic, tough and resistant to many chemicals while phenolic is highly flame resistant.
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.
Which polymer is heat resistant?
Polytetrafluoroethylene (PTFE) PTFE has one of the highest melting points of any thermoplastic at 327°C, and a very large operating temperature range. It’s thermally stable enough to be used anywhere between -200°C and +260°C.
Is PVC a natural polymer?
PVC, also known as polyvinyl chloride is a synthetic plastic polymer. Proteins are the natural polymers. Proteins are made out of amino acids hence proteins are polyamides so we can say that proteins are obtained from the plants and animals directly.
What is polymer explain?
Polymers are materials made of long, repeating chains of molecules. The materials have unique properties, depending on the type of molecules being bonded and how they are bonded. Some polymers bend and stretch, like rubber and polyester. The term polymer is often used to describe plastics, which are synthetic polymers.
Which polymer is not synthetic?
Cellulose is not a synthetic polymer.
What are the advantages of polymer?
Polymers are more resistant to chemicals than their metal counterparts. Polymer parts do not require post-treatment finishing efforts, unlike metal. Polymer and composite materials are up to ten times lighter than typical metals.
What is polymer give example?
Polymer is a substance made up of a large number of smaller molecules that link together to form larger molecules. An example of a synthetic polymer is plastic. An example of a natural polymer is rubber.
What are the characteristics of 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.
Which is not a thermosetting polymer?
SBR is not a thermosetting polymer Bakelite, polyester, polyvinyl acetate, SBR, polypropylene, nylon 6,6, thiokol, urea-formaldehyde resin, melamine formaldehyde resisn.
What are the different types of thermosetting plastics?
3.2. 2 Thermosetting Plastic Examples: Epoxy Resin. Phenolic(Bakelite) Vinyl Ester Resin. Cyanate Ester. Poly Ester.
What happens when thermosetting polymers are heated?
The bonding process: When thermoplastic polymers are heated they become flexible. Thermoset polymers do not soften when heated because the molecules are cross-linked together and remain rigid. The chemical bonding formed within a polymer, and the shape of the resulting polymer, affect its properties.
What is high temperature polymer?
High temperature resins offer better mechanical performance, wear resistance, and chemical resistance than most other polymers. Although all polymers will lose performance over time at elevated temperatures, high temperature polymers have rigid polymer chains that allow them to operate at higher temperatures.
Which polymer has highest service temperature?
Polytetrafluoroethylene, also known as PTFE and Teflon, is a widely used plastic that was discovered in 1938 by the company Chemours. It has one of the highest melting points out of any plastic, 620°F (327°C), but it maintains its strength at temperatures as low as -450°F (-268°C).
What are fire resistant polymers?
Fire-safe polymers are polymers that are resistant to degradation at high temperatures. Fire-safe polymers also find application as adhesives in aerospace materials, insulation for electronics, and in military materials such as canvas tenting.