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CHAPTER 14 POLYMER STRUCTURES PROBLEM SOLUTIONS 14.1 Polymorphismis when two or more crystal structures are possible for a material of given composition. Isomerismis when two or more polymer molecules or mer units have the same composition, but different atomic arrangements. 14.2 The mer structures called for are sketched below. (a) Polyvinyl fluoride (b) Polychlorotrifluoroethylene (c) Polyvinyl alcohol 1
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