Describe examples how polymers are used in everyday life. For example, needles used for vaccines and IVs use a plastic casing typically made of polyurethane. Large-scale commercial development dates from 1935 [11, 12]. monomer: The building block of polymers. Polycarbonate is commonly used in bulletproof glass and headlights, in lenses for headlamps, glasses and sunglasses, as well as in CD, DVD and Blu-Ray discs. within type by subtype, then by grade, etc. Polymeric materials, as demonstrated in this lesson and in Figures 2 and 6, are not all chemically the same. Then, talk about each item, highlighting its chemical structure. Therefore in engineering applications polymers are heavily used to replace costly materials whenever possible. They are the chemical substances; ranging in pH scale from 0 to 7. After this lesson, students should be able to: Each TeachEngineering lesson or activity is correlated to one or more K-12 science,
12). Ring stacking can also be observed between chains of polystyrene as with polycarbonate. Applications of polymer in daily life. Polymers are used to make electronic components, paint, plastic bottles, sunglass lenses, DVDs and so much more! Polymers are used in clothing, oil recovery, food and flavours, agriculture, packaging, consumer items like clothing, toys, skin care Polymers also used in automative parts, pipes, parts, additives etc. Any opinions, findings, conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation. Benzene, C6H6, is often drawn as a ring of six carbon atoms, with alternating double bonds and single bonds as shown below. A cross-link is a covalent bond formed between two polymer chains in a material (see Figure 5). Figure 1: Common applications for polymeric materials.copyrightCopyright © 2011 Cherelle Bishop, Colorado State University, Figures 1 and 2 list just a few examples of the many ways that polymeric materials have changed our day-to-day lives through primarily low-cost, mass-produced materials. Do you agree with this alignment? Recycling Drive: Ask students to each bring in several examples of polymeric materials for a class recycling drive. Thanks for your feedback! Lesson, High School
1. Lesson, Copyright © 2012 Cherelle Bishop, Colorado State University. Double-bag the slime formulations or use thicker freezer bags to prevent tears. Cups and bags have been made from this material. Attraction and repulsion between electric charges at the atomic scale explain the structure, properties, and transformations of matter, as well as the contact forces between material objects. Remind students of the study of atoms and basic molecules, and now molecules are going to link together to form a chain; that chain will create our polymer pet. You’ll explore commercial applications of polymers, learn how different plastics are synthesized, and discover how the materials and processes used can affect the product’s recyclability and malleability. (Present the following information to students as you show them the eight-slide Polymer Presentation, a PowerPoint file. The word “Polymer” is derived from two Greek words, ‘Poly’ that means many (numerous) and ‘Mer’ which means units. This means that non-covalent interactions between pi-bond electrons available in one polymer chain can interact with aromatic rings on another polymer chain when they are in close proximity. Have students describe how the material's properties and processing techniques enable the polymer to function well in various applications. Those single bonds between atoms in the backbone can swivel around a bit, like paper clips hooked together end-to-end. Most of these types of materials are easy to produce and have a low cost. For example, the polymer polyethylene has an ethylene backbone (CH2CH2). Polymers Found in Nature. Although recycling codes are usually placed on polymeric materials, not all polymeric materials used in consumer products are labeled with recycling coded and not all polymeric materials are actually recycled. In the ASN, standards are hierarchically structured: first by source; e.g., by state; within source by type; e.g., science or mathematics;
Polymers are used very widely in the production, distribution, packaging and preparation of food. One of the first uses of this material was in the Manhattan Project as a coating of valves and as a sealant in tubes containing uranium hexafluoride (highly radioactive material). Polymers are chains made of monomer subunits. Acids are common chemicals and can be found everywhere even in our food. In industrial field : PLA can also be used as a decomposable packaging material, either cast, injection-molded, or spun. Examine how plastics are used and polymers synthesized. In basic terms, a polymer is a long-chain molecule that is composed of a large number of repeating units of identical structure. Not everything you see here has a polymeric composition. Long-chain polymers often have many kinks in the chains, and these kinks can move and un-kink, causing the material to stretch. The name acid gives us sensory images of – Sourness. The first scientist to discover that polymers contained many small repeating units (monomers) was Hermann Studadinger. It is used in the manufacture of tyre ,cords, fabrics, and ropes. Bahadur, P. and Sastry, N. V. Principles of Polymer Science. Again, polyacrylamide can be derived from polyethylene by substituting a hydrogen atom with an amide functional group. Examples include nylon, acrylic, PVC, polycarbonate, cellulose, and polyethylene. Polyacrylamides are used in a various applications ranging from water purifiers, paper coating, cosmetic additives, photographic emulsion and contact lenses. Do chemical groups exist in the backbone?). The opposite is true with the "with cross-link" material, because chemical linkers between changes prevent the individual polymer chains from stretching when a force is applied to either end, making a more ideal material to bounce. This information gives students an idea for how to approach the design challenge after they make two different formulations of a poly(vinyl alcohol) silly putty. 20. Studadinger received the Nobel Prize in chemistry for his discovery of the chemical structure of natural rubber. The final monomer featured in Figure 2 is the monomer unit for polyurethane. Students explore the basic characteristics of polymers through the introduction of two polymer categories: thermoplastics and thermosets. (Listen to student responses.) Introduce students to the different chemical players involved in making silly putty: monomer, cross-linker and polymer. For example, Chitin, also known as N-acetylglucoseamine (derived from glucose monomers), forms the hard exterior of many crustaceans, turtle and beetle shells. The importance of polymers is due to their wide application range, as they resemble industrial, economical, medical, and academic interests and goods that enhance our lives on a daily basis . The "no cross-link" material has free-flowing polymer chains and stretches if force is applied to either end of the material chains. Additionally, have students each locate a material made from a polymer and be prepared to explain its chemical structure to the class. Styrene is used for important co-polymers and terpolymers such In other words, more cross-linking within a polymeric material results in a more rigid material, whereas less cross-linking results in a more elastic material. But are oil-based polymers sustainable? The Great Pacific Garbage Patch (GPGP) is an intriguing and publicized environmental problem. At the end of the animation, a final polymer strand is show in an A-B-A-B pattern. Common polymers you encounter every day are organic molecules. During teacher demos, students observe the unique behaviors of thermoplastics. To do this, researchers are working to develop polymers that, when compared with their non-sustainable counterparts: use renewable feedstocks, such … Since the 1930s the monomer has been used in co-polymers with elastomeric characteristics . (Another example would be to link student hands, paper clips, or strips of paper to form a chain). Do you agree with this alignment? To illustrate this point, imagine a kink in a garden hose; the kinks loosen after enough force is applied, which is similar to how polymeric materials stretch. They are used in the construction, furniture, electronics, communication, packaging, energy, health care, transportation, and sports & leisure industries, in everything from tractors to detergents to fabrics to aircraft. Review their answers to gauge their comprehension. Knowledge gained from other fields of study has a direct effect on the development of technological products and systems. This special issue of Biomacromolecules highlights research from The International Polymer Colloid Group (IPCG), which was founded in 1972 as a forum for the exchange of ideas and emerging research activities for scientists and engineers from both academia and industry who study or use polymer colloids. Activity, Middle School
Polyethylene is utilized in the bottles, electrical insulation, toys, etc Polyvinyl Chloride (PVC) is used in siding, pipes, flooring purposes. Polymers can be used to make items that have no alternatives from other materials. Ahluwalia, V. K. and Mishra, A. Polymer Science: A Textbook. Predict how a cross-linker will cause a change in the physical properties of a polymer system and how molecular arrangements influence these materials properties. Polyethylene is one of the most common polymeric materials found in plastic packaging, bottles and shopping bags. Over-aggressive mixing of slime in the plastic bags can lead to rupture, resulting in a slimy mess. Humans take what they find in nature and adapt it to their own needs. A familiarity with basic chemistry concepts. Some activities or lessons, however, were developed to stand alone, and hence, they might not conform to this strict hierarchy. Other applications for poly(vinyl chloride) are door frames, waterproof fabric and electrial wire insulation, The only chemical difference between polyethylene and poly(vinyl chloride) is the substitution of one hydrogen atom in polyethylene for a chloride ion in poly(vinyl chloride), as shown in Figure 4. In general, cross-links tend to make the polymer chain closer together and cause the material to become more rigid. Monomers can be combined in various repeating patterns to form different types of polymers. Use this opportunity to identify the seven recycling codes (see Figure 6) and discuss the chemical properties of each plastic material. 8), Matter has definite structure that determines characteristic physical and chemical properties
When many long polymer chains with a large number of cross-links are present within a material, the chains are chemically linked, making the material more rigid. Investigating or designing new systems or structures requires a detailed examination of the properties of different materials, the structures of different components, and connections of components to reveal its function and/or solve a problem. Usually, from oil or natural gas, they are long-chain molecules, each chain having hundreds of thousands of bonds. In this activity, polymers are used as illustrative materials for intermolecular bonds to help students to learn how the structures of polymers relate to their practical uses and properties. Consumer products also typically use an initial stamp to signify the chemical compositions of the polymer used to create the material. For example, the demand for lightweight parts and vehicles using recycled materials challenges engineers to make "smart polymers" that change their properties according to their environments. The act of stretching a polymer forces the polymer chain to align with each other because of the force applied to the material. Use this as an opportunity to incorporate scientific writing guides, electronic researching tools, and scientific citation into the class. Thanks for your feedback! Proteins and DNA are both synthesized from small subunits, called amino acids.Figure 2: Structures and common applications of six polymers.copyrightCopyright © 2012 Cherelle Bishop, Colorado State University, Polymers are formed by a process called polymerization, in which a chemical reaction of reacting monomer molecules forms polymer chains in a variety of complexities. 1. 94-107. Let us check it out some uses of polymers. The next monomer unit, featured in Figure 2, is polycarbonate. a project of D2L (www.achievementstandards.org). The inclusion of the aromatic rings can lead to pi-stacking between different polymer chains. Polymers are a part of our every day life and without them around, this world would be very, very different, if not impossible to live in. Many consumer products are made from polymeric material. www.teachengineering.org/lessons/view/csu_polymer_lesson01, Search curriculum by Common Core standards, Print lesson and its associated curriculum, Click to view other curriculum aligned to this Performance Expectation. Polymers are very large molecules compared to water. Polyurethanes are connected by urethane linkages. This work was developed by the Colorado Higher-Education Interdisciplinary Project (CHIP) in the Department of Electrical and Computer Engineering, based upon collaborative work supported by National Science Foundation grant no. Learn the basics and beyond in a series of activities designed to build skills in observation, planning, organic chemistry, and bonding. Boca Raton, FL: CRC Press, 2002; p. 401. Materials engineers rely on some polymers for their rigid strength, others for their flexibility, and still others for their resistance to corrosion. The polymer called Polyethylene is used in plastic bags and film wraps. Polycarbonate monomer includes the integration of two, six-membered aromatic rings separated by a carbon atom that has two methyl groups attached. Optionally, ask students to include schematics of the polymer chains and describe how certain functional groups interact with other functional groups between different polymer chains. CONSTRUCTION &REMODELING. The slime formulations or use thicker freezer bags to prevent tears students explore the basic characteristics polymers... 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