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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. 1 6 . The transcrystalline zone thickness is dependent upon melt temperature. 1 7 . Parison pleating decreases with increasing shear rate for a thermoplastic melt that behaves as a dilatant fluid. 1 8 . Blow up ratio is relative dimensions of the parison wall thickness and the die slit dimension. 1 9 . Frost line is directly proportional to the radius of the bubble for polyethylene film. 2 0 . Transverse modulus will increase directly with fiber volume fraction in a unidirectional composite. 2 1 . 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:___________________________ EMA 4666C Fall 2004 Exam 2 3
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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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