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Akron Global Polymer Academy Lesson Plans

Ooeey Gooey Fun! But Can We Sell This Stuff? - Putty Experiment

Grades: 10-12
Author: Michael Owen
Source: 1) stevespanglerscience.com and others- provide the directions for making the putty like material; 2) Instructions for interpretation of PDMS mass spectrum and poster design is original


Abstract

Students will make a puttylike material and test it for maximum bounce. Students will then use mass spectrometry as an analytical technique to determine if they can market their putty or if it is just a copy of Silly Putty ®.


Objectives

What should students know as a result of this lesson?

What should the students be able to do as a result of this lesson?


Materials


Procedures

Engagement

  1. Students will be presented power point notes and online video clips explaining the concept of mass spectrometry.
  2. Students will go on a field trip to the Knight Chemical Laboratory/University of Akron Mass Spectrometry lab. (mass spectrums of PDMS are attached if this is impractical)

Assessment: formative assessments will be made during the notes and field trip during Q and A sessions.

Exploration

  1. Students will work in pairs in the lab to create a puttylike material that has properties similar to Silly Putty ®. Students will adjust the ratios of the reacting materials to determine the one that produces maximum bounce of the polymer.
  2. Students will be able to observe the analysis of a polymer using the mass spectrometer.

Assessment: formative assessments will be made in the lab while the students are experimenting with their ratios of reactants to achieve maximum bounce.

Explanation

Assessment formative assessments will be taken as the lab groups analyze the mass spectrum of the PDMS.

Elaboration

Throughout the class, mass spectrometry will be referred to as an analytical technique that can determine what elements and bonds are in a certain compound. Mass spectrometry as a technique to determine average atomic mass will also be explained and assessed on a traditional end of course exam.


Prerequisites


Best Teaching Practices


Alignment with Standards

NGSS Standards:

*Essential knowledge 1.D.2: (from AP Chemistry course description at collegeboard.org)

b. Data from mass spectrometry also demonstrate direct evidence of different isotopes from the same element.

Ohio Standards:

*From Ohio's New Learning Standards: Science-Chemistry pg 298-299


Content Knowledge

Students will need to have knowledge of basic carbon chemistry and its ability to form long repeating chains. Students will also need access to the internet to perform their research into Silly Putty'sŪ creation and chemical makeup.


Safety


Applications

Students will know that mass spectrometry is an analytical technique that can identify the types of elements and bonds in a sample. This knowledge can be applied commercially to prevent trademark infringement.


Assessment