Chemistry

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What are some of the polymers that you encounter every day?
Sandwich bags, carpets, nylon stockings, stackable chains, milk cartons, etc.
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Why do different polymers have different properties?
They have different chemical compositions (different monomer units), different structures, different ways of being fabricated, etc.
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Why are olefins (alkenes) good monomers for polymerization reactions?
The electrons in the weak p-bonds can be used to form strong s bonds to other monomer units.
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What kinds of structural changes accompany bond-breaking and bond-forming in olefin polymerization?
The olefin monomers are flat (two-dimensional) molecules with sp2-hybridized carbon atoms. The polymers are three-dimensional molecules in which the carbon atoms are sp3 hybridized
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How does the molecular-level structure of these polymers influence their physical properties?
The structure (e.g., extent of branching) determines how the individual polymer molecules can orient (or "pack") in the solid state. This, in turn, influences physical properties such as density, crystallinity, melting point, and strength.
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Why are metals often good catalysts?
They provide a site where organic molecules can come together and react.
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Other cards in this set

Card 2

Front

Why do different polymers have different properties?

Back

They have different chemical compositions (different monomer units), different structures, different ways of being fabricated, etc.

Card 3

Front

Why are olefins (alkenes) good monomers for polymerization reactions?

Back

Preview of the front of card 3

Card 4

Front

What kinds of structural changes accompany bond-breaking and bond-forming in olefin polymerization?

Back

Preview of the front of card 4

Card 5

Front

How does the molecular-level structure of these polymers influence their physical properties?

Back

Preview of the front of card 5
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