What are some good polymerization chemistry experiment ideas

AI Thread Summary
Researching polymerization chemistry for a school science fair can involve various approaches, particularly with epoxy resins. One idea is to test how different hardeners, especially amines, affect cure time and strength, although this can be costly. Another suggestion is to explore the esterification of epoxy resins, though identifying a clear dependent variable is crucial. Simulating or modeling the cross-linking process with epoxy resins and curing agents is also a viable option. Discussions highlight the importance of understanding polymerization classes and their effects on properties like melting points and densities, which are influenced by crystallinity rather than just molecular weight. Practical examples include using body filler and hardening agents or Durham's wood putty, both of which are affordable and readily available, making them suitable for experiments.
Sam Donovan
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I'm very interested in researching polymerization chemistry for my school science fair.
All the ideas I have are either too expensive or not complex enough.
 
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What have you considered?
 
Bystander said:
What have you considered?

I've been focused on epoxy resins:

I thought about testing epoxy resins and how varying hardeners (mainly focused on amines: primary amines, tertiary amines, aliphatic,etc) affect "cure time" and relative strengths (this is too expensive).

I thought about an experiment about esterification of epoxy resins. (I'm not sure what my dependent variable, like what's a good thing to solve)

I thought about simulating or modeling the cross-linking caused by epoxy resin and a "curing agent"
 
Are you familiar with the various "classes" of polymerization reactions?
Sam Donovan said:
my dependent variable, l
Chain length?
 
Bystander said:
Are you familiar with the various "classes" of polymerization reactions?
Chain length?
No, not familiar.

How would you use chain length?
 
Look at melting points or densities as functions of chain length.
 
Bystander said:
Look at melting points or densities as functions of chain length.

Melt point of polymers is a function of crystallinity, not molecular weight. Density too is a function of crystallinity. Molecular weight is a function of chain length and its distribution.
 
A good example of a cross linking reaction is body filler and hardening agent. Inexpensive and sets up quick. You ca even mold it into shapes before it hardens. Available at Wal Mart and auto parts stores everywhere. Another example is Durham's wood putty. Cross links with water.
 
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