Fall_2001_EXAM_3 - POLYMER PROCESSING - FALL 2001 EMA 4666C...

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POLYMER PROCESSING - FALL 2001 EMA 4666C - EXAM III STUDENT #:______ - ______ - ________ INSTRUCTIONS: Read the entire exam carefully. Answer every question to the best of your ability, based upon the available information. State all assumptions you use in answers. SECTION I: Polymer Structures/Properties. (24 Pts) 1. Indicate the type of polymerization process used to manufacture each of the structures: addition, step growth or ring opening. 2. State the relative Tg and/or Tm for each polymer, assume atactic configuration for vinyl polymers. Polymer Process Tg or Tm a. poly (ethylene) b. poly (propylene) c. poly (ethylene terephthalate) d. poly (methyl methacrylate) e. poly (bisphenol A carbonate) f. poly (ethylene oxide) g. poly (styrene) h. poly (vinyl chloride) i. poly (dimethyl siloxane) j. n. poly (caprolactam) (Nylon 6) k. o. poly (p-phenylene amide) (Kevlar) l. p. poly(phenylene ether sulfone) (Udel)
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POLYMER PROCESSING - FALL 2000 EMA 4666C - EXAM III SECTION II: Polymer Structures/Property Relationships. (12 pts) Concepts. 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. 2a. The thickness of the transcrystalline zone of an injection-molded part is independent of mold temperature. 2b. The freeze line indicates the intersection between upper Canada and the Arctic Circle. 2c. The crystallization rate of a typical polyolefin is solely dependent of the conformation of the main chain, i.e., backbone. 2d. Pleating in parison formed by extrusion is solely dependent of viscosity.
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This note was uploaded on 07/17/2011 for the course EMA 4666c taught by Professor Brennan during the Spring '08 term at University of Florida.

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Fall_2001_EXAM_3 - POLYMER PROCESSING - FALL 2001 EMA 4666C...

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