F94exam1 - EMA 4666C Exam I Name Student ID # Read each...

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EMA 4666C Name Exam I Student ID # Read each question carefully. State any assumptions you make to answer the question/problem. 1. Sketch the structures of the following polymers: (10 pts) a. LDPE b. PVC c. Nylon 6,6 d. Poly(acrylic acid) e. Kevlar
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2. a. List in order from lowest to highest the Tg of the polymers in question #1: (2 pts) < < < < b. List those polymers from question #1 that are semi-crystalline. (2 pts) 3. Identify two thermoplastic elastomers. Give their structures. (4 pts) a. b. 4. Sketch the thermomechanical spectrum of PETP on the axis below. Give magnitude for modulus and temperature for transition(s). (6 pts) ℵ⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗
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Illustrate with dashed lines the effect of lower volume fraction crystallites on the plot in #4. (2 pts) 6. What effect would higher extruder speeds have on the volume fraction crystallites of PETP? (2 pts)
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F94exam1 - EMA 4666C Exam I Name Student ID # Read each...

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