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Exploring the Properties and Applications of Polymers: A Comprehensive Overview

This seminar, presented by Jon Valasek from St. Marks School of Texas and Debbie Goodwin from Chillicothe High School, delves into the fascinating world of polymers. Attendees will learn about the history, classification, and various properties of polymers, including thermoplastics and thermosets. The session emphasizes hands-on experiments and demonstrations to engage participants, particularly educators looking to enhance their curriculum in materials science. Join us to uncover the science behind these vital materials and their everyday applications.

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Exploring the Properties and Applications of Polymers: A Comprehensive Overview

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  1. Polymers - Part 2 Properties

  2. Presenters Jon Valasek • St. Marks School of Texas • Dallas • valasekj@smtexas.org Debbie Goodwin • Chillicothe High School • Chillicothe, MO • nywin@hotmail.com

  3. Polymer Ambassadors www.polymerambassadors.org Mission Statement: The Polymer Ambassadors, with resources from educational,industrial, and professional societies, promote polymer educationwith teachers, students, and community audiences.

  4. Materials Science Teacher Camps • Sponsored by ASM International Foundation • http://www.asminternational.org • Click on “Foundation” tab • Click on “Materials Camp” tab • One week in the summer • No cost

  5. MST Summer Camps • Albuquerque, NM Eldorado High School June 12 - 16 • Ann Arbor, MI U of Michigan July 17 - 21 • Calgary, Canada S Alberta Institute Tech August 21 - 25 • Charlotte/Monroe Wingate University June 19 - 23 • College Park, MD U of Maryland June 27 - 30 • Columbus, OHOhio State University TBA • Dallas, TXUniversity of TexasJuly 17 - 21 • Denver, CO Colorado School of Mines June 26 - 30 • Edmonds, WA Edmonds Community College July 17 - 21 • Edmonton, Canada University of Alberta July 24 - 28 • Gainesville, FL U of Florida June 26 - 30 • Houston, TX U of Houston June 26 - 30 • Long Beach, CA California State University July 10 - 14 • Piscataway, NJ Rutgers UniversityAugust 7 - 11 • Toronto, Canada University of Toronto August 14 – 16 • Youngstown, OH Youngstown State University July 17 - 21

  6. Polymers • Poly – many • Mer - parts • Long chain molecules made of many smaller repeating units

  7. Brief History of Polymers • How old are they? • Why do we use them? • Serendipity books

  8. Polymers • Timeline of Plastics • 1868     Cellulose Nitrate • 1900     Viscose Rayon • 1909     Phenol-Formaldehyde • 1927     Cellulose Acetate • 1933     Polyethylene • 1936     Acrylic or Polymethyl Methacrylate • 1938     Polystyrene • 1939     Nylon • 1941     Polyethylene Terephthalate • 1942     Low Density Polyethylene • 1942     Unsaturated Polyester • 1957     Polypropylene • 1964     Polyimide • 1970     Thermoplastic Polyester • 1978     Linear Low Density Polyethylene • 1985     Liquid Crystal Polymers

  9. Classification • Natural vs. Synthetic • Type of Polymerization • Addition • Condensation • Response to Heat • Thermoplastics • Thermosets

  10. Packing Peanuts • Polystyrene • Starch • Science Lessons • Flex • Compression • Density • Burn • Solubility

  11. Polymer Powders • Water lock • Hydrophilic • Instant Snow • Hydroscopic crosslink • HDPE Powder • Hydrophobic • Gel Crystals • Hydroscopic with semi-permeable cover

  12. Water Loc vs. HDPE • Draw 2 circles on the filter paper • Place Water Loc powder in the center of one circle • Place the same amount of HDPE powder in the center of the other circle • Slowly add drops of water to each powder until the water reaches the edge of the circle

  13. HDPE vs. LDPE • Linear vs. branching • Density • Amorphous vs. crystallinity • Optical properties • Demo – HDPE bottle and heat gun

  14. Elasticity vs. Plasticity • Elastic – returns to its original shape after being distorted by a stress • Rubber ball • Elastic in a waistband • Plastic – retains new shape after being distorted by a stress • Mud ball • Saran wrap

  15. Polymers • Thermoplastic • Melts with heat • Thermoset • Sets with chemical reaction • Elastomer • Is elastic

  16. Additional Labs & Demos • Polydensity tubes • Fibers • Polarizing film and stress • Happy/sad balls • Others……………………

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