Therefore they have different chemical and physical properties. I will avoid the obvious pun about molecular weight distribution and crystallinity.
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Physical properties of polymers include molecular weight molar volume density degree of polymerization crystallinity of material and so on.
Why do polymers have different properties. Polymers often have these properties in commonThey are. Monomers with different structures produce polymers with different types of intermolecular bonds. Viscosity is a term we use to describe the thickness of different liquids.
For example we. What are the properties and structures of polymers. While anything plastic is the most common example of a synthetic polymer broadly speaking there are for main categories of polymers thermoplastics and thermosets elastomers and synthetic.
This state is referred as the glassy state. One of the major breakthroughs in polymer chemistry occurred in the early 1950s when the German chemist Karl Ziegler discovered a group of catalysts that could efficiently polymerize ethylene. Polymers by definition are macro molecules ie.
This is why within any polymer there is a wide variation within the species. Different polymers have a number of unique physical and chemical properties due to which they find usage in everyday life. The properties of these polymers all depend on a variety of factors.
In this lesson we will learn about two classes of polymers thermo-softening polymers and thermosetting polymers. Below the covering of the cable is a block co-polymer of the two alkenes giving a very tough material with rubber-like properties. Plastic they can be moulded into shape.
Chemistry Single Science Separate chemistry 2. Mechanical Properties of Polymers. Different polymers have different properties depending on the monomers they are made from and the conditions under which these monomers were joined together.
The tacticity of a polymer chain can have a major influence on its properties. Prior to the session. PVC has chlorine atoms meaning PVCs can have dipole-dipole forces Explain why thermoplastic polymers have different properties to thermosetting polymers.
Answer 1 of 4. Thermal Properties of Polymers In the amorphous region of the polymer at lower temperature the molecules of the polymer are in say frozen state where the molecules can vibrate slightly but are not able to move significantly. It is of great importance to be familiar with some basic mechanical properties of the material before its application in any field such as how much it can be stretched how much it can be bent how hard or soft it is how it behaves on the application of repeated load and so on.
Lets start with a property that you are probably familiar with. In this state the polymer is brittle hard and rigid analogous to glass. Solids at room temperature.
Atactic polymers for example being more disordered cannot crystallize. This means that different polymers. Molecules of very large sizes and high molecular weight ranging from few 100 to several thousands.
However polymers are a much larger class of molecules that includes plastics and have a broad range of properties that can perform various functions. The key difference between polymers and metals is that the polymers are lightweight than the metals. Why does PVC polyvinyl chloride have different properties from polyethene.
Figure 3 Different types of co-polymer have different properties. The monomer unit the linkages between each monomer and the intermolecular and intramolecular forces that exist between polymers. Polymers have come to occupy a very important niche in the materials we use every day.
The structure of a polymer influences its use and properties. Now these big and bulky molecules having long chains can be arranged into varied arrangements. Sequence of activities Before the lesson.
Different types of intermolecular bonds exist. A polymer is a macromolecular material having a large number of repeating units linked to each other via covalent chemical bonds while metals are either pure elements or alloys. What makes them unique.
JEE Main 2021 LIVE Chemistry Paper Solutions 24-Feb Shift-1 Memory-Based. On the right the medical vials are made of a random co-polymer of ethene and propene which give a flexible and clear material. Suggest that students bring in samples of any plastic material washed and.
Some of these are. Polymers may be naturally found in plants and animals natural polymers or may be man-made synthetic polymers. Polymers have different properties and uses but it is difficult to dispose of them.
What common properties do all polymers have. DNA starch and proteins are biological polymers. Why do they have properties that arent easily replicated by other materials.
In laymans terms different polymers have different characteristics.
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