EMA6165-Fall_2010_Exam1revb

EMA6165-Fall_2010_Exam1revb - Student Number:_...

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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(styrene) 2. poly(caprolactam) (Nylon 6) 3. Poly(ethylene oxide) 4. Poly(ethylene terephthalate) 5. Poly(butadiene) Indicate stereoisomer 6. Poly(methyl methacrylate) EMA 6165 Fall 2010 Exam 1 ver b 1
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Student Number:___________________________ SECTION I: 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 rubber modulus slope of the Storage modulus is zero for a high molecular weight,  thermoplastic elastomer, i.e., poly(styrene-block-isoprene-block-styrene). 8. The   freely   jointed,   freely   rotating   model   underestimates   the   radius   of   gyration   of  polyethylene by a factor of 2 compared to the freely rotating model 9. The change in enthalpy of mixing is proportional to the difference of the square of the 
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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.

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EMA6165-Fall_2010_Exam1revb - Student Number:_...

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