Page 180 - Demo

Flinn Lab Activities and Demonstrations
Polymers—Laboratory Kits, continued
Golf Ball Design—Chemistry of Sports
Student Laboratory Kit
By: The Flinn Staff
The relationship between science and sports is undeniable. Tennis racquets and bicycles are made lighter and stronger by nanotechnology; footballs are inflated to the appropriate pressure (we hope) in accor- dance with the ideal and simple gas laws; sports drinks are carefully made and studied using analytical chemistry to improve athletic perfor- mance; and breathable, comfortable apparel is designed by applying the principles of materials chemistry. In this lab, students design the best inner core of a golf ball possible by varying the composition of a reac- tion mixture to take advantage of the principles of polymer chemistry. This lab will hone students’ experimental design and polymer synthesis skills, but a lower golf score is not guaranteed!
Complete for 24 students working in pairs.
Polyurethane Foam Hearts—
Student Laboratory Kit
By: The Flinn Staff
Make valentine hearts for that special someone! In this lab students create a heart out of polyurethane foam by mixing equal amounts of polyurethane parts A and B. This lightweight foam expands to about 30 times its original liquid volume and will become rigid in about 5 minutes. The hearts can be shaped or colored to suit individual, student preference, combining art and chemistry in a way that will develop your students scientific reasoning skills.
Complete for 24 students working in groups of 2.
Recycling Plastics by Density—
Student Laboratory Kit
By: The Flinn Staff
The United States produces almost 100 billion pounds of plastics every year, yet only 4% of this amount is recycled. Recycling plastics is a special challenge because of the variety of plastics in everyday use. In this student lab kit, students investigate the composition and properties of plastics and their recycling codes. Students determine the densities of “unknown” plastic samples, identify the unknowns, and learn why sorting and separating discarded plastics helps make recycling more effective. The density range for each type of plastic (PETE, HDPE, PVC, LDPE, PP, and PS) is estimated using a “sink or swim” method in a series of liquids. In order of increasing density, the liquids tested are corn oil, 35% ethyl alcohol, water, 10% sodium chloride solution, and glycerin. An excellent critical-thinking exercise, this activity also helps students discover the fascinating uses and applications of polymers, true “giants” among molecules! Includes reproducible student handouts, detailed background information, complete Instructor’s Notes with sample data and answers to all questions, and all necessary chemicals and consumable supplies.
Complete for 30 students working in groups of three.
1-800-452-1261
flinnsci.com
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Golf Ball Design—Chemistry of Sports Student Laboratory Kit AP8499
Catalog No.
Description
Price/Each
AP8499
Golf Ball Design—Chemistry of Sports Student Laboratory Kit
$40.15
Catalog No.
Description
Price/Each
AP8369
Polyurethane Foam Hearts—Student Laboratory Kit
$76.35
Polyurethane Foam Hearts— Student Laboratory Kit AP8369
Catalog No.
Description
Price/Each
AP7103
Recycling Plastics by Density—Student Laboratory Kit
$53.70
POLYMERS—LABORATORY KITS continued on next page.
Recycling Plastics by Density—Student Laboratory Kit AP7103