Chains and ShrinkvNecklaces
cross-linked polymer model
Author: Gina Watkiss: Georgia Polymer Ambassador
are giant molecules(too small to see) made up of smaller molecules called
"monomers". By cross-linking your gumdrop chains, you have created a
cross-linked polymer. That doesn't behave
like unlinled chains: they can't
move as easily.
a needle with strong thread.
a gumdrop and knot to hold in place.
to add gumdrops, carefully knotting and spacing about 2.5 inches apart.
the two chains by threading the two chains together at the gumdrops. Try
to leave about 2 inches between the gumdrops.
bears can be substituted for the gum drops.
Thank you to Ruth Kinsler for finding this activity in Super Science ConcoctionsJill Frankel Hauser, Williamson Publishing, October
a look at these books that can be used with polymer activites:
by Gina Watkiss, Georgia Polymer Ambassador,email: [email protected]
Try these activities: "Doing Science" by asking questions:
Lonely Sea Horse, Saxton Freymann & Joost Elferrs, Arthur Levine,
April 2000, ISBN#0439110149
Bear Counting Book, Lindley Boegehold, Anness Publishing Ltd., March
Alligator, Shirley Mozelle, Econo-Clad Books, October 1999, ISBN#0785761055
and Bottoms, Janet Stevens, Harcourt Brace, March 1995, ISBN#0152928510
Why not do some more fun things with your gumdrop chains
What happens to your chain if you tie the ends together? See what neat
mixtures of some linear chains and necklaces you can make. Draw the ones
you make and describe their properties:
How they move if you pull on just one point.
You made one crosslink between two linear chains. What happens if you make
more cross links between these two chains? With other chains?
Record your observations in words and drawings.
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©2000 | Department
of Polymer Science | University
of Southern Mississippi
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