Unformatted text preview: C118 Discussion Worksheet Polymers, 2009 Name __________________ 1. This equation represents the polymerization of vinyl chloride. At the molecular level as the reaction takes place, how does the bonding around both carbons change? Are there any geometry changes? Answer: 2. Here is a monomer for polymerization Cl CC Cl Cl Cl a. Analogous to the equation in your notes for polyethylene, write the chemical reaction for the polymerization of n molecules of tetrachloroethylene to form a polymer b. Why is a repeating head‐to‐tail arrangement not possible for this polymer? Answer: 1 3. When Styrofoam packing peanuts are immersed in acetone (the primary component in some nail‐polish removers), they dissolve. If the acetone is allowed to evaporate, a solid remains. The solid still consists of Styrofoam, but now it is solid and much denser. Explain. Hint: Remember that Styrofoam is made with foaming agents. Answer: 2 4. Here is a monomer that forms rubber. Here is its structural formula, with the carbons numbered. 1 23 4 When this monomer adds to form a polymer, the polymer has a C‐to‐C double bond between carbon atoms 2 and 3. Draw a mechanism to show how this double bond forms? Hint: Each double bond has four electrons in it. When a new single bond is formed between two monomers, that single bond only needs two electrons in it; one from each of the monomers joined by that new bond. Answer: 3 ...
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