Through the following key select activities, students examine viscoelastic, mechanical, and absorptive properties of polymers. They design and test a nonelectrical humidity sensor made of a polymer film.
MWM will give students an opportunity to understand the world around them in a way they have never experienced before. The modules promote an awareness of the roles science and technology play in society and guide students to take increased control of their work.
Activity 1: Changing Polymer Pellets
Students compare the absorptive properties of polymer pellets in plain water and in a saturated salt solution. Based on their data, students draw conclusions about the application of this polymer in gardening and other areas.
Activity 5: Measuring Water Absorption by Different Polymer Films
Students cast films of polystyrene, poly(vinyl alcohol), and three molecular weights of poly(vinyl acetate) and then test water absorption by each film. Students learn about the effects of monomer type and film thickness on water absorption by polymer films.
Design Project 1: Designing a Humidity Sensor
Students construct prototypes of a humidity sensor in the form of polymer films embedded with cobalt(II) chloride, which changes color as the surrounding humidity changes. Students test and evaluate their prototypes and redesign them to make them more effective.
Connecting to Your Curriculum
Materials World Modules are simple to organize and inexpensive to run. They are designed to be easily incorporated into any middle school science or high school science lab or lecture course. The chart below lists the subjects covered in the Activities and Design Projects sections of this module.
Physics & Physical Science
Geology & Earth Science
Biology and Life Science
People often wonder how Teflon, created to be non-stick, is attached to a frying pan.
With great difficulty!
The pan’s metal surface must be severely scratched – or microscratched, to be exact – in the first step of the Teflon coating process.
How much Teflon do you need by weight to cover an average frying pan surface?
Solutions and Clues in Polymers Module.
|Renee DeWald talks about the Polymers Module (8 minutes 5 seconds)|
|View Youtube video|