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Unformatted text preview: POLYMER PROCESSING - FALL 1997 NAME:___________________________ EMA 4666C - EXAM III STUDENT #:______________________ EMA 4666C - POLYMER PROCESSING EXAM III - FALL SEMESTER 1997 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 either the Tg or the Tm . (16 pts) 1. Poly(arylene ether sulfone) 2. Poly(vinylchloride) 3. Poly(butadiene) 4. Poly(ethylene terephthalate) 1 POLYMER PROCESSING - FALL 1997 NAME:___________________________ EMA 4666C - EXAM III 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. (10 pts) a. Blow up ratio is a relative difference between the actual dimensions of the parison and the final dimensions. ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ b. Parison length increases with die swell ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ c. Barrier Properties of blown film improve with blow up ratio....
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This note was uploaded on 07/17/2011 for the course EMA 4666c taught by Professor Brennan during the Spring '08 term at University of Florida.
- Spring '08