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Unformatted text preview: 0.08 0.15 32,00044,000 0.17 0.21 44,00056,000 0.29 0.28 56,00068,000 0.23 0.18 68,00080,000 0.16 0.10 80,00092,000 0.05 0.03 2 3. Callister 4.7 Make comparisons of thermoplastic and thermosetting polymers (a) on the basis of mechanical characteristics upon heating, and (b) according to possible molecular structures. 4. Callister 4.8 The number-average molecular weight of a poly(acrylonitrile-butadiene) alternating copolymer is 1,000,000 g/mol; determine the average number of acrylonitrile and butadiene repeat units per molecule. 5. a) What is a mer? b) What is the mer for PTFE (polytetrafluoroethylene)? c) What is the mer for polyvinylchloride (PVC)? d) What is the mer for polystyrene (PS)?...
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This note was uploaded on 11/28/2010 for the course ENME 250 taught by Professor Shang during the Spring '10 term at Maryland.
- Spring '10