Fall 2004 EXAM 2 - POLYMER PROCESSING - FALL 2004 NAME: PUT...

Info iconThis preview shows pages 1–5. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: POLYMER PROCESSING - FALL 2004 NAME: PUT ON LAST PAGE and SIGN HONOR CODE EMA 4666C EXAM 2 STUDENT #:______________________ 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. (2 pts each/12 pts total) 1. Draw the structural repeat units for the following polymers. 2. Indicate the type of polymerization process used to synthesize each of the structures, i.e. condensation, addition, ring opening. 3. State the relative Tg and/or Tm for each polymer. If a Tm is not expected indicate by NA. Polymer Structural Repeat Unit Process Tg Tm 1. poly(carbonate) (bisphenol-A) 2. poly(1,4-butadiene) 3. poly(methylmethacrylate) 4. poly(vinyl chloride) 5. poly(ethylene terephthalate) 6. poly(styrene) Student Number:___________________________ 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. 7 . The volumetric output through a circular die scales directly with the radius of the die raised to the fourth power. 8 . The total output from an extruder will increase with a decrease in polymer melt viscosity. 9 . A Newtonian fluid with a Reynolds number exceeding 2300 is shear rate independent. 1 . Increasing the die temperature of an extruder will reduce extrudate swell at the exit of the die. 1 1 . The temperature at which a semi-crystalline polymer is injection molded is typically 20-40 degrees above its Tg. EMA 4666C Fall 2004 Exam 2 2 Student Number:___________________________ 1 2 . During film blowing, increasing the blow-up ratio will increase the orientation of crystals in the machines direction. EMA 4666C Fall 2004 Exam 2 3 Student Number:___________________________ Graphical Relationships (3ea / 12 pts): A. SHOW ALL EQUATIONS. B. EACH GRAPH SHOULD BE A LINEAR RELATIONSHIP....
View Full Document

This note was uploaded on 09/18/2011 for the course EMA 4666c taught by Professor Brennan during the Spring '08 term at University of Florida.

Page1 / 14

Fall 2004 EXAM 2 - POLYMER PROCESSING - FALL 2004 NAME: PUT...

This preview shows document pages 1 - 5. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online