Polyethylene is one of the most common polymeric materials found in plastic packaging, bottles and shopping bags. Many consumer products are made from polymeric material. Additionally, have students each locate a material made from a polymer and be prepared to explain its chemical structure to the class. 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. (Grades 9 - 12). The word polymer is derived from the Greek root poly-, meaning many, and mer, meaning part or segment. Experiments with Polymers Annette M. Jacobson, ... and to make them aware of the usefulness of these materials which are found in many products we use in our everyday lives. 9 -
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. For instance, poly(vinyl chloride) is a strong, corrosion-resistant polymer commonly used in plumbing applications, whereas polyethylene is an example of a flexible polymer found in plastic bags. Recycling Drive: Ask students to each bring in several examples of polymeric materials for a class recycling drive. 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. However, most people do not even know what a polymer is, or just how widespread they are around us.Polymers are formed from hydrocarbons, hydrocarbon derivatives, or sometimes from silicon. A polymer is a chemical term for a material composed of repeating units called monomers. 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. The origin of man-made polymers traces back to Central America and the ancient Aztecs, Olmecs and Mayas, who all made a form of rubber by combining natural latex found in plants with the juice of morning glory vines [source: Kaufman ]. Fascinating new exhibition explores enduring artistic bond between Scotland and Italy, 6 Simple Tips and Tricks for Cheap Scrapbooking, Why Solar Power Popularity is Growing in Tucson. The physical properties of the materials are influenced by the arrangement of the chains. Polymers are an important part of our day-to-day lives, but how much do your pupils know about them? Large-scale commercial development dates from 1935 [11, 12]. BOTTLES. Polymers can be made into clear, waterproof films. Aromatic rings (also known as aromatic compounds or arenes) are hydrocarbons that contain benzene. 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. 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. Free K-12 standards-aligned STEM curriculum for educators everywhere. All 100,000+ K-12 STEM standards covered in TeachEngineering are collected, maintained and packaged by the Achievement Standards Network (ASN),
PARACHUTES. Figure 3: Three conformations in which the polymer chains may be arranged within a polymeric material.copyrightCopyright © 2011 Cherelle Bishop, Colorado State University, Molecular Forces and Chemical Composition of Polymers, Differences in chemical composition can influence a material's application. These covalent bonds cause the polymer chains within a polymeric material to become networked. (Bottom of slide from left to right:) The first two images show vascular grafts made from polytetrafluroethylene, with the second vascular graft (middle ) featuring roughness on the surface to promote integration of the vascular graft to the patient. The structure and chemical composition of the polymer chain determines the physical properties of the material. 2. Some activities or lessons, however, were developed to stand alone, and hence, they might not conform to this strict hierarchy. Cellulose, a polysaccharide, is used by many plants for structural stability. For example, the polymer polyethylene has an ethylene backbone (CH2CH2). some examples of such uses are listed below. Do you agree with this alignment? The information and activities provided show how scientists and engineers work together to create new products and processes using new materials discovered through chemistry. 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. 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. 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). 1. CREDIT CARDS. Knowledge gained from other fields of study has a direct effect on the development of technological products and systems. Polymers are formed from hydrocarbons, hydrocarbon derivatives, or sometimes from silicon. 8), Matter has definite structure that determines characteristic physical and chemical properties
homopolymer: A polymer made from only one type of monomer. Museums, Exhibits, Artists, Milestones, Digital Art, Architecture, Photography, Photographers, Special Photos, Special Reports, Featured Stories, Auctions, Art … (Listen to student responses.) Now, linear polymers do not have to be in a straight, rigid line. HS-PS2-6. Depending on the polymerization reaction conditions, the resulting polymer can be a simple linear chain of linked carbon atoms. Dear User, please complete the form below in order to recommend the Artdaily newsletter to someone you know. Bottles, toys, containers, trays, disposable glasses and plates, tv cabinets and lids are some of the daily-used products made up of polystyrene. After this lesson, students should be able to: Each TeachEngineering lesson or activity is correlated to one or more K-12 science,
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. 20. 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. 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. CONCLUSION:-We have tried to give a brief information on polymers .Polymers are everywhere around us and we tried to show a glimpse of polymers applications which are commonly used in our lives like plastics nylon and day to day used commodities. Depending on the degree of cross-linking within a material, the polymer chain will have different properties. Let us check it out some uses of polymers. about the process of development and the design and performance of a proposed process or system) in multiple formats (including orally, graphically, textually, and mathematically). Following the discovery of synthetic materials, scientists learned how to modify and tune their chemical and physical properties to make them useful for various applications. Some success has been achieved in recycling certain polymeric materials, such as polyethylene terephthalate (PETE), which is used to make plastic bottles, packaging and plastic containers. Polymers also exist inside the human body. Polyurethanes are connected by urethane linkages. Chain-growth polymerization (or addition polymerization) involves the linking together of molecules incorporating double or triple carbon-carbon bonds. 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. Thanks for your feedback! Polyethylene is utilized in the bottles, electrical insulation, toys, etc Polyvinyl Chloride (PVC) is used in siding, pipes, flooring purposes. Many of these materials are made from synthetic polymers and were developed in commercial laboratories, but countless other polymer examples are found in nature and in living organisms. Learn the basics and beyond in a series of activities designed to build skills in observation, planning, organic chemistry, and bonding. But are oil-based polymers sustainable? copolymer: A polymer made from two or more types of monomer subunits. Used for manufacturing optical fiber cables, drumheads, automotive industry, ropes, wire ropes and cables. The strengths of a polyethylene plastic bag and a water pipe made from cross-linked polyethylene are very different. The image on the right shows poly(vinyl chloride), commonly used in medical tubing. natural polymer: A polymer that is synthesized naturally by a plant or organism. Polyethylene is utilized in the bottles, electrical insulation, toys, etc; Polyvinyl Chloride( PVC) is used in siding, pipes,flooring purposes. In order to influence the material properties of the silly putty students make, they will need to determine the amount of tetrahydroxyborate anion or cross-linking agent that is incorporated into the polymer. Not everything you see here has a polymeric composition. Again, polyacrylamide can be derived from polyethylene by substituting a hydrogen atom with an amide functional group. The act of stretching a polymer forces the polymer chain to align with each other because of the force applied to the material. Acids are common chemicals and can be found everywhere even in our food. Hydrochloric Acid (HCl) Usually, from oil or natural gas, they are long-chain molecules, each chain having hundreds of thousands of bonds. Lesson, High School
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