m25_ps15_fall03

m25_ps15_fall03 - d What is the glass transition...

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Problem M25 In addition to chapters 4-7 of Ashby and Jones Engineering Materials, you may also find the chapters on polymers in Ashby and Jones, Engineering Materials 2, helpful (this is a green covered book, available in the Aero-Astro library). a) Define the term polymer and list three engineering polymers. b) Define a thermoplastic and a thermoset. c) Distinguish between a cross-linked and a non-cross-linked polymer.
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Unformatted text preview: d) What is the glass transition temperature? e) Explain the change in moduli of polymers at the glass transition temperature. f) What is the range of temperature in which T G lies for most engineering polymers? g) How would you increase the modulus of a polymer? Unified Engineering Fall 2003 (Materials and Structures)...
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