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EMA4161-Fall_2010_Exam1reva

EMA4161-Fall_2010_Exam1reva - Student Number INSTRUCTIONS...

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Student Number:___________________________ 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. (4 pts each/24 pts total) 1. Indicate the type of polymerization process used to synthesize each of the  structures, i.e. condensation (C), addition (A), or ring opening (RO). 2. State the relative Tg and/or Tm for each polymer.  If either is not  measurable indicate by NA.   Polymer Process (2pt) Tg (1pt) Tm (1pt) 1. Poly(ethylene terephthalate) 2. poly(caprolactam) (Nylon 6) 3. Poly(styrene) 4. Poly(ethylene oxide) 5. Poly(methyl methacrylate) 6. Poly(butadiene) Indicate stereoisomer EMA 4161C Fall 2010 Exam 1 ver a 1
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Student Number:___________________________ SECTION II: 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.   HINT:  Normally one word can be modified to correct false statements. 7. The chi parameter is directly proportional to the change in enthalpy of mixing. 8. The   freely   jointed,   freely   rotating   model   overestimates   the   radius   of   gyration   of 
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