Fall 97 EXAM2 - POLYMER PROCESSING - FALL 1997

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Unformatted text preview: POLYMER PROCESSING - FALL 1997 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. HONOR CODE : We, the members of the University of Florida community, pledge to hold ourselves and our peers to the highest standards of honesty and integrity. Signature:___________________________________________________________ SECTION I: Polymer Structures/Properties. Draw the repeat units for the following polymers. Indicate the type of polymerization process used to manufacture each of the structures and the Tg. (20pts) 1. Poly(tetrafluoroethylene) 2. Poly(dimethylsiloxane) 3. Nylon 6,6 4. Kevlar 1 POLYMER PROCESSING - FALL 1997 NAME:___________________________ EMA 4666C - EXAM II STUDENT #:______________________ 5. 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. (8 pts) The extruder output is directly proportional to the length of the channel in the absence of Pressure Flow. _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ ___ The Processing Window (Intersection of Extruder Output and Die Output) expands with increasing Channel Depth. _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________...
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Fall 97 EXAM2 - POLYMER PROCESSING - FALL 1997

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