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Unformatted text preview: POLYMER PHYSICS Spring 1999 NAME:___________________________ EMA 6165 EXAM III 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. 1. Draw the repeat units for the following polymers. 2. State the relative Tg and/or Tm for each polymer 3. (24pts) Polymer Structural Repeat Unit (2pt) Tg (1pt) Tm (1pt) a. poly(methyl methacrylate) b. poly(propylene) c. poly(hexamethylene adipamide) (nylon6,6,) d. poly(bis phenol A carbonate) e. poly(dimethylsiloxane) f. poly(ethylene terephthalate) POLYMER PHYSICS - Spring 1999 EMA 6165 - EXAM III 2. 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. Spinodal phase separation processes are characterized by instantaneous precipitation with small fluctuations in the electron density initially b. The retractive force of an ideal elastomer is predominantly controlled by the enthalpy at...
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This note was uploaded on 07/20/2011 for the course EMA 6165 taught by Professor Brennan during the Spring '08 term at University of Florida.
- Spring '08