Fall_2004_EXAM_3 - POLYMER PROCESSING - FALL 2004 EMA 4666C...

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POLYMER PROCESSING - FALL 2004 NAME: PUT ON LAST PAGE and SIGN HONOR CODE EMA 4666C – EXAM 3 STUDENT #:______________________ INSTRUCTIONS: Read the entire exam carefully . Answer every question to the best of your ability, based upon the available information. State all assumptions in answers. SECTION I: Polymer Structures/Properties. (1 pt each/15 pts total) 1. State the relative Tg 2. State the Tm for each polymer. If a Tm is not expected indicate by NA. Polymer Tg Tm 1. poly(carbonate) (bisphenol-A) 2. poly(1,4-butadiene) 3. poly(propylene) 4. poly(methylmethacrylate) 5. poly(vinyl chloride) 6. poly(ethylene terephthalate) 7. poly(ethylene) 8. poly(styrene) 9. poly(hexamethylene adipamide) (Nylon 6,6) 10. poly(bisphenol A ether imide) (ULTEM) 11. poly(phenylene sulfide) 12. poly(caprolactam) (Nylon 6) 13. poly(dimethylsiloxane) 14. poly(terephthalamide) (Kevlar) 15. poly(Bisphenol A ether sulfone)
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Student Number:___________________________ Concepts. (2pts ea/12pts total) 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. 16. The transcrystalline zone thickness is dependent upon melt temperature. 17. Parison pleating decreases with increasing shear rate for a thermoplastic melt that behaves as a dilatant fluid. 18. Blow up ratio is relative dimensions of the parison wall thickness and the die slit dimension. 19. Frost line is directly proportional to the radius of the bubble for polyethylene film. 20. Transverse modulus will increase directly with fiber volume fraction in a unidirectional composite. 21. The mass output of the extruder through the nozzle is directly dependent upon the extruder screw speed. EMA 4666C Fall 2004 Exam 2 2
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Student Number:___________________________ Graphical Relationships (2 pts ea. / 8 pts total): A. SHOW ALL EQUATIONS. B. EACH GRAPH SHOULD BE A LINEAR RELATIONSHIP. C. LABEL ALL AXES WITH THE APPROPRIATE UNITS. D. CLEARLY STATE ALL ASSUMPTIONS . 22. Sketch the relationship between the melt temperature and shear rate. (Assume a Newtonian Fluid Behavior) 2 pts 23. Plot melt viscosity versus shear rate for high density polyethylene. Assume non-Newtonian behavior (i.e. use Power-Law relationship).
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Fall_2004_EXAM_3 - POLYMER PROCESSING - FALL 2004 EMA 4666C...

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