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EMA6165-Fall_2010_Exam2rev-b

EMA6165-Fall_2010_Exam2rev-b - 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.  Specify stereoisomers, tacticity, etc as required. Polymer Process (2pt) Tg (1pt) Tm (1pt) 1. Poly(propylene) 2. poly(n-butyl methacrylate) 3. Poly(arylene ether imide) Ultem 4. Poly(dimethylsiloxane) 5. Poly(bisphenol A carbonate) 6. Poly(vinyl chloride) EMA 4161C Fall 2010 Exam 2 ver b 1
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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. Physical   aging,   i.e.,   density   of   a   glass,   decreases   logarithmically   with   the   time   at  temperature above the Tg.
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