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Polymers - Part 2

Polymers - Part 2. Properties. Presenters. Jon Valasek St. Marks School of Texas Dallas valasekj@smtexas.org Debbie Goodwin Chillicothe High School Chillicothe, MO nywin@hotmail.com. Polymer Ambassadors. www.polymerambassadors.org Mission Statement:

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Polymers - Part 2

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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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