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ch04 - Chapter 4 Polymer Structures Concept Check 4.1...

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Chapter 4 Polymer Structures Concept Check 4.1 Question: Differentiate between polymorphism (see Chapter 3) and isomerism. Answer: Polymorphism is when two or more crystal structures are possible for a material of given composition. Isomerism is when two or more polymer molecules or repeat units have the same composition, but different atomic arrangements.
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Concept Check 4.2 Question: On the basis of the structures presented in the previous section, sketch the repeat unit structure for poly(vinyl fluoride). Answer: Inasmuch as poly(vinyl chloride ) has the repeat unit structure shown in Figure 4.2(b), replacing the side-bonded chlorine atom with a fluorine atom will yield a poly(vinyl fluoride ) repeat unit, as shown below.
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Concept Check 4.3 Question: What is the difference between configuration and conformation in relation to polymer chains? Answer: Relative to polymer chains, the difference between configuration and conformation is that conformation is used in reference to the outline or shape of the chain molecule, whereas, configuration refers to the arrangement of atom positions along the chain that
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