EMA6165-Fall-2008-EXAM1

EMA6165-Fall-2008-EXAM1 - POLYMER PHYSICS Fall 2008 EMA...

Info iconThis preview shows pages 1–6. Sign up to view the full content.

View Full Document Right Arrow Icon
POLYMER PHYSICS – Fall 2008 STUDENT UFID#:______________________ EMA 6165 - EXAM I (use the NEW UF ID No.) INSTRUCTIONS: Read the entire exam carefully. Answer every question to the best of your ability, based upon the available information. State all assumptions you use in answers. SECTION I: Polymer Structures/Properties. State the polymerization mechanism, i.e., condensation, addition, ring opening. State the relative Tg and/or Tm for each polymer. (20pts) Polymer Polymerization Mechanism (2pt) T g (1pt) T m (1pt) 1. poly(methyl methacrylate) 2. poly(styrene) 3. poly(propylene) 4. poly(butadiene) 5. poly(ethylene terephthalate)
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
POLYMER PHYSICS - Fall 2008 EMA 6165 - EXAM I SECTION II: Concepts. Answer the following statements with TRUE or FALSE . If the statement is false, state the reason(s). If you believe a statement can be made TRUE by a simple qualifier, then state it clearly. (Normally only a single word change is required.) (12 pts) 6. Chain disentanglement initiates at the ultimate strain to failure. 7. The second moment of the molar mass is defined as the Viscosity Average Molar Mass. 8. The mean square end to end distance defines the average distance between chain ends for a Gaussian Chain. 9. Chain branches increase the radius of gyration relative to linear chains of the same molar mass. 2
Background image of page 2
POLYMER PHYSICS - Fall 2008 EMA 6165 - EXAM I SECTION III: Graphical Relationships: 1. Each plot should be represented as a linear function if possible through algebraic manipulation. 2. You must provide all equations used to create the plot 3. Label all axes appropriately, i.e., provide units and orders of magnitude. 4. STATE ALL ASSUMPTIONS required. 10. The Characteristic Ratio versus the Molar Mass for a linear polyethylene (6pts) 11. Given a perfectly elastic chain, plot the ultimate stress as a function of the root mean square end to end distance. Show all equations! (6pts) 3
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
POLYMER PHYSICS - Fall 2008 EMA 6165 - EXAM I SECTION IV: Definitions/Concepts: Give a BRIEF description for each of the following terms in the SPACE provided. Use equations or words or figures. (16 pts) 12. Glass transition temperature: 13. <Mz>: 14. ROM: 15. Chain configuration: 16. Rayleigh Scattering: 17. Characteristic ratio: 18. Complex modulus: 19. Chain expansion factor : 4
Background image of page 4
POLYMER PHYSICS - Fall 2008 EMA 6165 - EXAM I SECTION V: Engineering Problem 20.
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 6
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 07/20/2011 for the course EMA 6165 taught by Professor Brennan during the Spring '08 term at University of Florida.

Page1 / 11

EMA6165-Fall-2008-EXAM1 - POLYMER PHYSICS Fall 2008 EMA...

This preview shows document pages 1 - 6. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online