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Fall_2000_EXAM_2 - POLYMER PROCESSING FALL 2000 EMA 4666C...

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POLYMER PROCESSING - FALL 2000 NAME:___________________________ EMA 4666C - EXAM II STUDENT #:______________________ 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. 1. Draw the repeat units for the following polymers. 2. Indicate the type of polymerization process used to manufacture each of the structures. 3. State the relative Tg and/or Tm for each polymer (24pts) Polymer Structural Repeat Unit Process Tg Tm a. poly (butadiene) b. poly (2,6,-dimethyl phenylene oxide) c. poly (bisphenol A carbonate) d. poly (propylene) e. Kevlar {poly (p-phenylene amide)} f. poly (tetrafluoroethylene)
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POLYMER PROCESSING - FALL 2000 EMA 4666C - EXAM II 4. 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. (12 pts) a. The biaxial stress of an ideal elastomer under tension is indirectly proportional to the 3.4 power of the extension ratio. b. The shear modulus of PVC (assuming ideal elastomer behavior) should scale directly with the cube root of the volume fraction of the plasticizer.
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