Properties And Uses Of Polymers Pdf

  • and pdf
  • Friday, January 29, 2021 5:46:01 AM
  • 4 comment
properties and uses of polymers pdf

File Name: properties and uses of polymers .zip
Size: 27498Kb
Published: 29.01.2021

Plastic , polymeric material that has the capability of being molded or shaped, usually by the application of heat and pressure. This property of plasticity , often found in combination with other special properties such as low density , low electrical conductivity, transparency, and toughness, allows plastics to be made into a great variety of products.

PDF This review article focuses on conducting polymers and their applications. Polyvinyl chloride is used in furniture and clothing and has recently become famous for the construction for doors and windows.

Characteristics, Applications and Properties of Polymers

This activity involves the students in an inquiry based examination of the physical and chemical properties of polymers. Note: This exercise should be changed to make use of the resources available. If a fume hood is not available then delete that portion of the procedures that requires that equipment. Polymers are all around us. Polymers are versatile as you note from the various uses in the materials around and on you, and resource efficient, as polymers consume only 4 percent of the world's oil supply.

Polymers reduce oil consumption and carbon dioxide emissions. This investigation focuses on the physical and chemical properties of polymers. State, "You have collected plastic containers that are made up of different kinds of plastics called polymers.

If you look on the bottom of your container you will see a triangle with a number in it. This is called a recycling code and refers to the type of polymer in the container. Each type of polymer is different from another in some ways and the same in other ways. Ask, "What do you think a physical property is? An example would be when you heat a metal and it melts.

Ask, "What do you think a chemical property is? An example would be adding acid to the same metal would cause the metal to react and become a salt with hydrogen gas given off.

Assessment: Ask students to give you examples of physical and chemical properties and qualify them by putting them on the board. 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. Ask, "Which of the physical properties should we test? Lead them to identify the following in the procedures below: Also conduct a discussion how they will record their observations and tests. For each polymer perform the following:.

Ask, "Which chemical properties should we test? Again lead students to perform the following:. Assessment: Have groups compare their test procedures and arrive at agreement on which procedures they will use and how they will document the test results. This could be in the form of tables or narratives but all students need to agree on the same format. Discuss why that is important. Have students report orally and in writing their results with comparisons between the different polymers.

Assessment: Have students compare results and communicate their findings to the entire group. Possibly students could form companies and test unknown polymers to determine their identity. Also students could adopt a polymer and generate a report which would include the test data. Also teachers could help form student advocacy groups for polymer use and education.

Assessment: Have groups correctly identify unknowns. Have students give oral reports on their advocacy efforts. To minimize safety concerns, the teacher should place the chemicals in a baby food jar or similar container that has a lid. The lid is only removed by the student to put the plastic in then quickly closed to prevent any vapors from escaping.

The physical test should be supervised by the teacher. Material Safety Data Sheets should be consulted for all chemicals used in this activity. Consumers of polymer products should be knowledgeable of their properties and biodegradability. Students should be able to define and give examples of physical and chemical properties of substances in general and polymers specifically. Grouping Suggestions: Students should be placed in groups of two or three.

Objectives What should students know as a result of this lesson? Operationally apply physical and chemical property definitions to specific examples.

Discuss that plastics are polymers that can be categorized into six types. Identify physical and chemical properties of polymers. Identify differences in polymers. What should the students be able to do as a result of this lesson? Test polymers for differences in physical properties. Test polymers for differences in chemical properties. Accurately record observations. Compare polymer tests for similarities and differences. Orally and in writing communicate test analysis and results.

Materials In this activity the teacher will need to gather polymers from various food containers, recycling codes 1 through 6, so have students collect these items at home and bring them to school at least the day before the activity. You will need the following reagents: distilled water, ethanol, acetone, 3. Preparation details for these reagents are in the safety section. Potassium carbonate, sodium chloride, and distilled water.

Electronic balances or else use large pieces of polymers and manual balances to determine their densities. Alcohol lamps or candles. Beakers or small containers to hold reagents.

A fume hood optional Procedures Note: This exercise should be changed to make use of the resources available. Engagement Polymers are all around us. Ask, "In what ways are they different? Ask, "In what ways are they the same? State, "Scientists categorize these differences into physical and chemical properties. State, "Let's test these polymers and see how they are the same and how they are different.

For each polymer perform the following: Describe the polymer to include color, hardness, flexibility, opaque or transparent, odor, etc. Compare your results. Determine the density of your sample by placing the sample in the test solutions provided by your teacher.

Record whether the sample sinks or floats in each solution and decide the approximate density. To find a more precise density for each sample, mass your sample, find the volume by water displacement, then divide mass by volume to calculate density.

Compare your results with the tests you preformed at the beginning of this procedure. Determine the strength of your sample by attempting to tear, bend, twist, stretch etc. Record your results for each sample.

What happens when you hit your sample with a hammer? Other tests can be performed at the teacher's discretion. Again lead students to perform the following: Use the fume hood and place a small piece of your sample in the second blue flame of a Bunsen burner. That is the part of the flame further from the barrel. Observe and record results. Introduce your sample close to a candle flame. Make observations and record results. State, "I have selected some chemical solutions for you to test chemical reactivity.

Perform the following:" Instruct the groups to repeat as necessary until they can illustrate the patterns in their notebook. Instruct students to select one person to put their mouth on the short side of the box and make a soft sound. Place 10 mL of each of the following in separate test tubes or glass containers: water, ethyl alcohol, acetone, ethyl acetate, 3M sulfuric acid, 3M nitric acid, 3M sodium hydroxide, 3 M sodium chloride, and mineral oil and then add a small piece of your sample to each container.

Stopper test tubes or place the lid on the glass containers. Make initial observations and then record results after 30 minutes, and 24 hours. State, "To test biodegradability let's do the following:" Place a piece of your sample in the "Is it biodegradable" container and observe monthly.

Explanation Have students report orally and in writing their results with comparisons between the different polymers. Elaboration Possibly students could form companies and test unknown polymers to determine their identity. MS-PS Analyze and interpret data on the properties of substances before and after the substances interact to determine if a chemical reaction has occurred.

MS-PS Gather and make sense of information to describe that synthetic materials come from natural resources and impact society. Safety To minimize safety concerns, the teacher should place the chemicals in a baby food jar or similar container that has a lid. Prepare reagent as follows Acetone is available in finger nail polish remover. Prepare 3. Prepare 2. Applications Consumers of polymer products should be knowledgeable of their properties and biodegradability.

Assessment Students should be able to define and give examples of physical and chemical properties of substances in general and polymers specifically. Other Considerations Grouping Suggestions: Students should be placed in groups of two or three.

Service Unavailable in EU region

Anyone can learn for free on OpenLearn, but signing-up will give you access to your personal learning profile and record of achievements that you earn while you study. Start this free course now. Just create an account and sign in. Enrol and complete the course for a free statement of participation or digital badge if available. Polymers are long chain molecules with properties dominated by their chain behaviour and the nature of their chemical make-up or constitution. The distinction between thermoplastics and thermosets has become rather blurred with the development of new materials for more demanding environments than previously.

Introduction to polymers

Plastic , polymeric material that has the capability of being molded or shaped, usually by the application of heat and pressure. This property of plasticity , often found in combination with other special properties such as low density , low electrical conductivity, transparency, and toughness, allows plastics to be made into a great variety of products. These include tough and lightweight beverage bottles made of polyethylene terephthalate PET , flexible garden hoses made of polyvinyl chloride PVC , insulating food containers made of foamed polystyrene , and shatterproof windows made of polymethyl methacrylate.

Polypropylene PP is a linear hydrocarbon polymer, expressed as CnH2n. Polypropylene is one of those most versatile polymers available with applications, both as a plastic and as a fibre, in virtually all of the plastics end-use markets. Looking to buy polypropylene? Following the work by Ziegler in Germany, the process for producing "stereoregular" polymers was perfected by Professor Giulio Nattain in Italy.

Polymer , any of a class of natural or synthetic substances composed of very large molecules, called macromolecules, that are multiples of simpler chemical units called monomers. Polymers make up many of the materials in living organisms, including, for example, proteins , cellulose , and nucleic acids. Moreover, they constitute the basis of such minerals as diamond , quartz , and feldspar and such man-made materials as concrete , glass , paper , plastics , and rubbers. The word polymer designates an unspecified number of monomer units.

Lesson Plans

British Plastics Federation

This activity involves the students in an inquiry based examination of the physical and chemical properties of polymers. Note: This exercise should be changed to make use of the resources available. If a fume hood is not available then delete that portion of the procedures that requires that equipment. Polymers are all around us. Polymers are versatile as you note from the various uses in the materials around and on you, and resource efficient, as polymers consume only 4 percent of the world's oil supply.

Polymer Engineering Science and Viscoelasticity pp Cite as. Many materials found in nature are polymers. In fact, the basic molecular structure of all plant and animal life is similar to that of a synthetic polymer. Natural polymers include such materials as silk, shellac, bitumen, rubber, and cellulose. Other engineers mechanical, civil, electrical, etc. 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. Many of the useful properties of polymers are in fact unique to polymers and are due to their long chain molecular structure.

Prior to the early 's, chemists doubted the existence of molecules having molecular weights greater than a few thousand. This limiting view was challenged by Hermann Staudinger , a German chemist with experience in studying natural compounds such as rubber and cellulose. In contrast to the prevailing rationalization of these substances as aggregates of small molecules, Staudinger proposed they were made up of macromolecules composed of 10, or more atoms. He formulated a polymeric structure for rubber , based on a repeating isoprene unit referred to as a monomer. For his contributions to chemistry, Staudinger received the Nobel Prize. The terms polymer and monomer were derived from the Greek roots poly many , mono one and meros part. Recognition that polymeric macromolecules make up many important natural materials was followed by the creation of synthetic analogs having a variety of properties.


A large number of polymer applications in different fields depend on their unique mechanical properties like tensile strength, elasticity, toughness, etc. These.


Structure, Types and Characteristics of Polymers

 Прими аспирин. - Не помассируешь мне спину? - Он надулся. Мидж покачала головой. - В Космополитене пишут, что две трети просьб потереть спинку кончаются сексом. Бринкерхофф возмутился. - У нас ничего такого не случалось.

 Обычная проверка кандидата. - Ну и ну… - Беккер с трудом сдержал улыбку.  - И что же ты ответила. Она ткнула его в ногу носком туфли. - Я сказала нет! - И, выдержав паузу, добавила: - И до вчерашней ночи это была правда. В глазах Сьюзан Дэвид был самим совершенством - насколько вообще такое .

4 Comments

  1. Zak H. 01.02.2021 at 04:28

    Pdf file opener free download abnormal psychology book 9th edition pdf

  2. Jodi B. 01.02.2021 at 11:52

    Electrocardiography for healthcare professionals 3rd edition pdf getting started with blender pdf

  3. Marsilius D. 01.02.2021 at 19:16

    ACC is investing in research to improve understanding of how chemicals impact health and the environment.

  4. Eustache R. 03.02.2021 at 23:16

    Getting started with blender pdf nasm study guide 6th edition pdf