Fall_2009_Exam1 - POLYMER PROCESSING - FALL 2009 NAME: PUT...

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Unformatted text preview: POLYMER PROCESSING - FALL 2009 NAME: PUT ON LAST PAGE and SIGN HONOR CODE EMA 4161C Exam 1 STUDENT #:______________________ Version 2 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, addition, ring opening. 2. State the relative Tg and/or Tm for each polymer. If either are not measurable indicate by NA. Polymer Repeat Unit Structure Process Tg Tm 1. Poly(ethylene) 2. poly(1,6-hexamethylene amido adipate) (Nylon 6,6) 3. Poly(bisphenolA carbonate) 4. Poly(dimethyl siloxane) 5. Poly(butadiene) 6. Student Number:___________________________ EMA 4161C Fall 2009 Quiz 1 2 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, linear polymer. 8. Poly(1,4-butadiene-net-1,2-butadiene) is a linear polymer 9. Chain entanglements increase in the linear, elastic region of a stress versus strain tensile experiment. 10. Chain entanglements increase in the linear, elastic region of a stress versus strain tensile experiment. 11. Chain entanglements increase in the linear, elastic region of a stress versus strain tensile experiment. 12. Chain entanglements increase in the linear, elastic region of a stress versus strain tensile experiment. Section III: Graphical Relationships (NEXT PAGE): A. SHOW ALL EQUATIONS. B. IF POSSIBLE, REPRESENT EACH GRAPH AS A LINEAR RELATIONSHIP. C. LABEL ALL AXES WITH THE APPROPRIATE UNITS AND CRITICAL TRANSITIONS. D. CLEARLY STATE ANY/ALL ASSUMPTIONS. Student Number:___________________________ EMA 4161C Fall 2009 Quiz 1 3 13. Sketch the general features of the storage modulus (E) a function of temperature for poly(styrene). Label the major transition (s) and their magnitude relative to E 4 pts 14....
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Fall_2009_Exam1 - POLYMER PROCESSING - FALL 2009 NAME: PUT...

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